oracle dba interview questions for experienced professionals


New connections will not be% accepted and will not come down until all committed transactions %are written in the DB(Rolled_forward) and all uncommitted data is removed (Rolled_back). The size of the recoverycatalog schema depends on the number of databases being monitored by the catalog. Ø Use SYNC/AFFIRM I/O where Primary waits for acknowledgement that redo has been transmitted synchronously and written to disk. Save my name, email, and website in this browser for the next time I comment. If you are staying or looking training in any of these areas, Please get in touch with our career counselors to find your nearest branch. This list includes questions for junior,  experienced and characteristics of Oracle database, roles of a database administrator, tools used for administering Oracle database, comparing a cluster and a grid, Oracle Grid Computing Architecture and more. Dear Readers, Welcome to Oracle 11g Interview questions with answers and explanation. Q12.What is the difference between SPFILE and PFILE? We provide the Oracle DBA online training also for all students around the world through the Gangboard medium. According to research, Oracle RAC has a market share of about 1.0%. When the instance crash happens and data are missed to write in the data file, then the changes can be obtained from the redo log, so work is never lost. Create the control file from the control file backup and place it in the correct location, When tablespace is put into offline/read only/drop or truncate, sysdba: Can do all kinds of DBA works and also can create a DB. A profile is the resource limit(session per user,connect time,password expiry,password login atteps) That is, it synchronizes the information hinders in the support reserve with the datafiles on circle. It is a DML lock. Q9.what are the different components of physical and logical database structure? If control file backup is not available, then the following will be required. parameters in this file are necessary to start a DB. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Question3: What are the steps to performing complete recovery on the whole database? Library cache,  Database Buffer Cache, Data Dictionary cache, Redo log Buffer cache, Shared Pool. SHUTDOWN NORMAL, TRANSACTIONAL, IMMEDIATE. $cp *.dbf/u01/app/backup/db_name (This command will copy all datafile. Hot Backup: Backup is taken when DB is up and running. To use this feature FLASHBACK_ON parameter needs to be set and flashback point should be created beforehand. Our SQL Interview Questions blog is the one-stop resource from where you can boost your interview preparation. Answer:  ./opatch lsinventory 100 GB of database size while applying opatch it will take 30 mins, so 500 GB of database size how much time it will take to apply opatch. I have divided the questions into 3 categories Technical Interview Questions, Unix Related questions asked to an Oracle Database Administrator (DBA) and Backup and Recovery Interview Questions commonly asked in Oracle DBA interview. List of frequently... We are conveniently located in several areas around Chennai and Bangalore. When the server method demands free space in buffer cache to read new blocks. Q41.When effects DBWR write to the data file? Schema(User) Level export/import, exp system/manager file=’/u01/app/oracle/ctsuser.dmp’ log=’/u01/app/oracle/ctsuser.log’ owner=ram View Disclaimer. Oracle Database Interview Questions are the frequently asked questions in the interview process for database related job roles. From sql we can execute in SQL> show parameter control_files; The primary function of the redo log file is to record all changes made to data. Q45.Clarify the devices which are utilized to fire up an Oracle database? These questions and answers are suitable for both freshers and experienced professionals at any level. A physical standby database is a robust and efficient DR solution which is easy-to- manage. Learn more about Oracle DBA in Oracle DBA Tutorial. Question2: What is fractured Block? The data file has all the data stored. OEM will recognize the status of the down database and will introduce you " Startup" catch. Prophet utilizes Tablespace for consistent information Storage. Recovery catalog also holds RMAN stored scripts. The  PFILE is read at instance startup time to get specific instance characteristics. Oracle Interview Questions. you can send me your word document at **email address removed by Netminder 18 Oct 2005**. Full database Level export/import Oracle Database Administrator Interview questions and answers. AWR: AWR report mainly we have to analyze query elapsed time and executions. It inludes DB name,datafiles,redofile names and its location,timestamp of DB creation,cureent log sequence number,checkpoint info etc.. These questions are common for both Senior Oracle DBA or Junior DBA. All trademarks are properties of their respective owners. SQL> select file_name, hwm, blocks total_blocks, blocks-hwm+1 shrinkage_possible, FILE_NAME                             HWM TOTAL_BLOCKS SHRINKAGE_POSSIBLE, set markup html on spool on spool select_result.html, select table_name, tablespace_name from all_tables. The PFILE is text-based and can be edited in an editor like vi on UNIX or Notepad on Windows. select max(sequence#) from V$archived_log; select max(sequence#) from V$log_history; Q24.Our standby database not in sync with production 10000 archivelogs gap will be there how to sync with production ? Q19.RMAN full backup was failed due to archivelogs error, What we will do ? Parameters in SPFILE are changed dynamically.. RMAN cant backup PFILE, It can backup SPFILE. Answer:  It is used to security of our database, Privileged IP address only able to access the database. Lietener.ora and Tnsnames.ora files are used. Oracle Database is a database management system, where data are inserted and retrieved. “Very useful questions and proper answers of Oracle DBA HR Interviews” Here are some common and general interview questions raised by either HR department or It recruiters. Ans-It is an database object used to increase the performance for retrieval data. If they are lagging, then we must restore the missing logs. The frequently asked questions from oracle database are given below. Database files (Header of datafiles is freezed during backup). Also, we can check alert logs on both standby and primary database. SQL> select status,error from gv$archive_dest where dest_id=2; ERROR ORA-00270: error creating archive log ERROR ORA-00270: error creating archive log ERROR ORA-00270: error creating archive log. oracle apps dba interview questions: 60 awesome oracle apps dba interview questions.Must read to succeed in interviews and jobs oracle apps technical interview questions and answers: 19 oracle apps technical interview questions and answers to succeed in your career. The ID1 column identifies the object being modified. It is responsible to writing data from database buffer cache into datafiles. Library cache is used to store Oracle statements.Data Dictionary Cache contains the definition of Database objects and privileges granted to users. Any changes that were made in PFILE would only take effect when the database is restarted only. Top Oracle DBA, RAC, and Performance Tuning Questions on Advanced Topics for Experienced Professionals: In continuation of the previous article, Top Oracle interview questions , this article includes a set of interview questions to cover some advanced Oracle concepts like database architecture, backup/recovery of database and performance tuning. I have divided the questions into 3 categories Technical Interview Questions, Unix Related questions asked to an Oracle Database Administrator (DBA) and Backup and Recovery Interview Questions commonly asked in Oracle DBA interview. Q39.What are the specific disk components? Ø Data loss can happen in case of failover, Ø Uses ASYNC/NOAFFIRM I/O where primary will not wait for acknowledgement of redo transmission. UNDO & TEMP tablespace are optional when you create a database. Q51.How will you recover the database from a loss of a data file? Oracle database is used to store and retrieve information. ... as well as a brief explanation of their experience level with each. The location of user process trace file is specified in the USER_DUMP_DEST parameter. Your email address will not be published. What is an Oracle Instance? Hi Yogesh, Thanks for the URL, but all these questioniers are already available with me but , I am seriously looking for senior ORACLE DBA positions where configurations,Replication s, Data gaurd, and RAC installation and Trouble shooting questions with answers are available. Q28.What are the different tools that are provided by Oracle to assist performance monitoring? Spfile: Server parameter file of binary file, It contains all the information for setting the database initialization parameters. Q44.What is Oracle and what is it utilized for? Let’s start by looking at a few of the most frequently asked Oracle DBA interview questions: Q1. SPFILE permits dynamic changes without requiring you to restart that instance. Its value can be known by querying v$pgastat dynamic performance view. From the views % v$session% and % v$process%, mkdir -p /db_name/oracle/admin/scripts cp -R copy directory tree, scp rman_driver_10g.sh oracle@90.501.30.19:/GDSNP/oracle/admin/scripts. Using flashback and restore point option we can open and rollback the standby database. If not we will either create new indexes or can use hints to specify which indexes to use. Oracle Interview Questions and Answers. select ‘alter system kill session ”’||sid||’,’||serial#||”’ immediate;’ from v$session where SERVICE_NAME =’Processing’ and status=’INACTIVE’ ; select inst_id,sid,serial#,machine,username,OSUSER,status from gv$session where SERVICE_NAME =’Processing’ and status=’INACTIVE’; select tablespace_name,sum(bytes)/1024/1024/1024 as GB from dba_data_files group by tablespace_name; I will investigate V$SYSAUX_OCCUPANTS col OCCUPANT_NAME for a30. Que: Tell us something about yourself? The last SCN number. The language may even be exactly the same as that used in the application, which does not force the programmer to have two representations of his objects. DBA need to select the option based on either application is looking for benefit of performance or protection. If a customer calls you about a hanging database session, what will you do to resolve it? All the tables are stored in data files. As soon as you start a database, the instance sit in RAM, and retrieves the data and update it through SGA. It is always in open state and allows users to access for queries and reporting at any time. 7 Database Administrator Interview Questions and Answers . New connections will not be% accepted and will not come down until %existing transactions to commit and exit or close themselves. for the current user. Oracle Interview Questions and Answers provided here are appropriate for both freshers and experienced candidates. Each piece order is known as a partition also can occur accessed separately. Physical backup – User Managed backup( Cold and Hot backup) The control file contains the physical structure of the database, such as the number of log files and their location. Oracle Apex Interview Questions for Experienced Professionals Q1. It is network connectivity, Application and sql developer tool to access database. All this is accomplished while delivering high performance. We need to take AWR report and check query elapsed time and how many executions, Query using proper index or not, or elase we have to analyze table and indexes.Check alertlog any issue occurred. Rolling –> Each node is patched one by one. Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. 2. Collectively, the software that runs oracle and the physical database are called the Oracle database system. The database is updated using SQL statements generated by mining the redo logs. Oracle Dba Interview Questions by questionsgems. 1. Release locks or other resources 2. it can be known by using command from sqlplus as show parameter pga. Primary database issue commits only when transaction gets applied to standby database. Q35.Different areas where we can perform tuning? Yes, the damaged blocks can be recovered. exp system/manager file=’/u01/app/oracle/ctsfull.dmp’ log=’/u01/app/oracle/ctsfull.log’ full=y Hot backup is taken when the database is still online and database should be in ARCHIVE. The Oracle Certified Professional (OCA/OCP) Database Administrator (DBA) accreditation is intended to reflect capability in Oracle database engineering, establishment, organization, execution tuning, and investigating. Download of oracle dba interview questions and answers as PDF is also given below SCN is a unique ID that Oracle generates automatically for every transaction which is committed., It is recorded for every change in the redo entry. While the db_file-scattered_read event indicates full table scan. It is done when maintanance is planned.It is a reversible role transition. Haw many databases and what sizes? $cp  *.ctl/u01/app/backup/db_name   (This command will copy control file ). SCN is an ID that Oracle makes to every transaction. We will start looking at the network issues, Check if the query is changed from yesterday to today, Generate explain plan and see where is the problem. and then shutdown instance and startup once again. ADDM: It is a utility helps in providing some recommendations based on the statistics collected every hour. SPFILE is available from Oracle 9i and above. You must also backup your ORACLE_HOME binaries which are used for cloning. If you are looking for DBA Database Tuning Interview Questions, here is the comprehensive list. Minimum Downtime Patching –> some nodes are up.some nodes under patching, unwanted process or ubnormally terminated process Oracle Performance Tuning Interview Questions and answers are very useful to the Fresher or Experienced person who is looking for a … You initially associate with an inactive case with SQL*Plus and after that startup the case with "startup" direction. The logical structure is a database, tablespace, segment, extent, and blocks. Ans-It will help optimizer to generate best execution plan. The shrinkage is in blocks, to get how much you can shrink multiply by block%size of the database to TOTAL_BLOCKS SHRINKAGE_POSSIBLE to find out amount of space will be released . A database buffer cache stores the data in memory for quicker access. Both primary and standby database can be either standalone or RAC Database. Q30.How can we identified the resources for which the sessions are waiting? LGWR writes redo or changed information from redo log buffer cache in cyclic fashion to redo log files. These 50 solved Oracle 11g questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. SQL_TRACE parameter can be set at database, instance, or session level. There are a lot of opportunities from many reputed companies in the world. List... CCNP Interview Questions and Answers for beginners and experts. Due to various insert & delete actions, that file gets fragmented & unstructured data, through creating that relationship slowly. startup nomount- does not mount the controlfile. Whenever number of changed blocks reaches a maximum value. Ø It is a Mixture of Maximum Protection and Maximum Performance. Get top rated Oracle DBA interview questions here-. Pfile: It is text parameter file, information for setting the database initialization parameters. SQL*Plus: This is the most generally utilized choice. are clean shutdown methods as database maintains its consistency. MAXLOGMEMBERS, MAXLOGHISTORY, MAXDATAFILES for the database to use the command. If you have to advise a backup strategy for a new application, how would you approach it and what questions will you ask? and tracking every single activity in the database. The certification names are the trademarks of their respective owners. As an Oracle DBA, you can expect to be involved in the following tasks: Performing upgrades of the database and software to new release levels, Starting up and shutting down the database, Managing the database’s storage structures, Managing schema objects, such as tables, indexes, and views, Making database backups and performing recovery when necessary, Proactively monitoring the database’s health and taking preventive or corrective action as required. Oracle Exadata Database is the database primarily developed by Oracle which provides optimized functionality. That is the reason why without control file database cannot be up. UL Lock – Defined with dbms_lock package. The motivation behind a database is to store and recover related data. B-tree index – Retrieves a small amount of information from a large table. Ø At least one standby database should get synchronized before the transaction commits at primary. Oracle as a database service provider to the industry is the leading vendor for Transactional systems, Data warehouse, enterprise grid … You should change your init.ora file with the following information, log_archive_dest=’/u01/oradata/archlog’ (for example). You can easily create PFILE from SPFILE simply by giving create PFILE from SPFILE; All the parameter values are now updated with SPFILE. There are a lot of opportunities from many reputed companies in the world. A tablespace can have objects from various outline's and construction can have numerous tablespace's. The database makes " Framework tablespace" as a matter of course amid database creation. When Can Hash Cluster Used? If you're searching for Oracle DBA interview questions and answers for experienced professionals, then you are in the right place. Monitoring and tuning performanceIn a small to midsize database environment, you might be the sole person performing these tasks. RMAN can be used without recovery catalog. Once original database objects remain classified. Q7.How to check opatch applied or not in our Oracle home? These oracle performance tuning interview questions will help you to crack your oracle job interview. What is the way to clear them? Q25.How to open standby database read write mode and again how to rollback, What are options we have to use it. Ans. There are 3 types of protection mode for standby database. remap_schema,remap_table,remap_tablespace. Before DBWR writes modified blocks to the datafiles, LGWR writes to the. Data files, Control files , Redolog file Password files, Parameter files. Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPARTMENTS, and LOCATIONS tables. So, it is recommended to have minimum 2 standbys when configuring maximum protection mode to avoid unwanted outages on production. Cold Backup: Backup is taken when DB is down and in mount stage, ( select file_id, max(block_id+blocks) hwm. Oracle provides software to create and manage the Oracle database. Here is a list of 60 interview questions about Oracle Database with their answers. Q16.How to analyze AWR report and ADDM report. LGWR is the background method that writes redo data from redo log buffers before the log files. All Rights Reserved. There are a lot of opportunities from many reputed companies in the world. Physical backup Don't let the Lockdown slow you Down - Enroll Now and Get 3 Course at 25,000/- Only. For such queries the specified cluster key value is hashed. DBWR is a background process which writes data blocks info from DB buffer cache to data_files. Oracle DBA Interview Questions and answers for the job placements. Dear Readers, Welcome to Oracle 11g Interview questions with answers and explanation. Oracle Dba Interview Questions by questionsgems. PGA_AGGREGATE TARGET parameter specifies target aggregate PGA memory available to all server process attached to an instance. how you  will troubleshoot this problem? Oracle is also a database server, which manages data in a very structured way. These questions and answers are suitable for both freshers and experienced professionals at any level. 1. cluster loses connectivity between each other and starts to function independantly. sysoper: can do all kinds of DBa works but cant create a DB with this user. His duty is to take backup of the growing data, and install patches, and secure the data. As long as all data files are safe and on a successful completion of it is ok, We can restore the control file by performing following commands CONNECT INTERNAL STARTUP MOUNT and then, you can TAKE ANY OFFLINE TABLESPACE (Read-only), after that you have to ALTER DATABASE DATAFILE (OFFLINE), RECOVER DATABASE USING BACKUP CONTROL FILE, Shutdown and back up the system. We hope these Oracle DBA Interview Questions and answers are useful and will help you to get the best job in the networking industry. normalization benefits in identifying specific relationships between schema objects. It is recorded including those corresponding variety into a redo approach. According to research, Oracle DBA has a market share of about 0.7%. A binary file that records physical straucture of the DB,needed to startup the DBand operate it SELECT blocked_locks.pid AS blocked_pid, blocked_activity.usename AS blocked_user, blocking_locks.pid AS blocking_pid, blocking_activity.usename AS blocking_user, blocked_activity.query AS blocked_statement, blocking_activity.query AS blocking_statement FROM pg_catalog.pg_locks blocked_lock, JOIN pg_catalog.pg_stat_activity blocked_activity ON blocked_activity.pid =, JOIN pg_catalog.pg_locks           blocking_locks, ON blocking_locks.locktype = blocked_locks.locktype, AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE, AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation, AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page, AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple, AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid, AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid, AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid, AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid, AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid, AND blocking_locks.pid != blocked_locks.pid, JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid. It does OCR backup for every 3hrs. List of frequently asked... Informatica MDM Interview Questions and Answers Are you aspiring to start your career... PySpark Interview Questions and Answers Are you looking for a career in Apache... Flutter and Dart Interview Questions and Answers Are you looking for the best... Microsoft Dynamics CRM Interview Questions Have you come here in search of Microsoft... Angular 8 Interview Questions and Answers for beginners and experts. Oracle Questions Did you use online or off-line backups? Which software Course is the Best to Get a High Paying Job Quickly? Redo log buffer cache records all changes made to the data files. These oracle performance tuning interview questions will help you to crack your oracle job interview. We can take export(exp) in four levels. The Control file information can be shown in the initialization parameter file. By this we can easily find out the culprit and kill it . It has the information when was the last database backup was taken, whether is failed or success. Updates are first committed to production database before the logfile arrives on DR site. By combining V$locked_object and v$session. This blog is the perfect guide for you to learn all the concepts related to SQL, Oracle, MS SQL Server and MySQL database. Oracle Performance Tuning Interview Questions and answers are prepared by 10+ years of experienced industry experts. What is an Oracle Instance? ©, 2020. $cp *.log/u01/app/backup/db_name (This command will copy all redo log file. The redo logs track and store all the changes made to the database. To update the DB components with the new atch details and get validated. It contains physical and logical structures. When a row is too long that it cannot and then it will end up accepting consequent blocks which can be lead to this concept of Row Chaining. Q54.What are the two involved in network connection to a database? Changes made in SPFILE are dynamically effected with running database whereas PFILE changes are effected after restarting the database. Cold backup is taken when the database is in offline mode. The objects as such can be stored in the database. Q36.How can we monitor these space allocations in a database? To get data inside these indexes, rebuilding is completed. $cp  *.dbf/u01/app/backup/db_name   (This command will copy all datafile. If you're looking for SQL Server DBA Interview Questions for Experienced or Freshers, you are at the right place.There are a lot of opportunities from many reputed companies in the world. It is the medium to connect to the database. One or more data files. In case you are looking for Oracle DBA interview questions, this is the correct place for you. If you're looking for Oracle DBA Interview Questions for Experienced or Freshers, you are at the right place. New connections will not be% accepted and db will not come down until existing % connections exit or close themselves. Q22.how to import table with different schema and different table and different tablespace ? These are the best Oracle DBA Interview Questions. Home Blogs Interview Questions Oracle DBA Interview Questions and Answers. The language of the DBMS can be integrated with an object- oriented programming language. Q18.What are the different types of backups that are available in Oracle? Slove : Hope the above set would have provided you a good knowledge of any of the advanced ideas of Oracle. For RAC,if n number of redo logfile in primary, then nuber of thread *(n+1) standby redo logfile should be created for standby. select dbms_metadata.get_ddl(‘USER’,’NAVA’) from dual; select dbms_metadata.get_granted_ddl(‘SYSTEM_GRANT’,’NAVA’) from dual; select dbms_metadata.get_granted_ddl(‘OBJECT_GRANT’,’NAVA’) from dual; select dbms_metadata.get_granted_ddl(‘ROLE_GRANT’,’NAVA’) from dual; ORA-39095: Dump file space has been exhausted: Unable to allocate 8192 bytes, Job “SYS”.”SYS_EXPORT_FULL_07″ stopped due to fatal error at Mon Oct 29 00:56:43 2018 elapsed 0 03:42:59. The database consists of physical and logical structures in which system, user, and control information is stored. ... as well as a brief explanation of their experience level with each. Alert log file is a log file that records database-wide events which is used for trouble shooting. A full backup is a backup of all the control files, data_files, and parameter_file both SPFILE binary file and PFILE-static). Note: RAM is a user in the database, exp system/manager file=’/u01/app/oracle/ctstab.dmp’ log=’/u01/app/oracle/ctstab.log’ tables=ram.emp, imp system/manager file=’/u01/app/oracle/ctstab.dmp’ log=’/u01/app/oracle/ctstab_imp.log’ fromuser=ram touser=ram tables=emp, Shared pool,Db buffer cache and Redo buffer cache are the components of SGa, A java based utility that applies or rollback of patches to oracle software. It is expected to save session specific information. imp system/manager file=’/u01/app/oracle/ctsuser.dmp’ log=’/u01/app/oracle/ctsuser_imp.log’ fromuser=ram touser=ram INVALID –>When LGWR cannot write or ACCESS, Collection of high impact, low risk and proven fixes for a specific product, All node –> Patches done at all nodes at a time This output can be used for control file recovery as well. The physical standby database is sync with production by Redo Apply. Different types of user locks are given as follows. 11G also supports heterogeneous configurations in which the primary and standby systems may have different bit/processors or OS version. Oracle DBA Interview Questions and Answers. If you're looking for Oracle RAC Interview Questions for Experienced or Freshers, you are at the right place. So, this article on Oracle interview questions will cover the most frequently asked interview questions and help you to brush up your knowledge before the interview. Each object, which is being changed mainly we have to analyze query oracle dba interview questions for experienced professionals time and.. Complete Oracle Interview questions are common for both freshers and experienced professionals, then we must the. That holds by the metadata managed by RMAN from the backup mode, therefore there is no extra redo buffer! The number of changed blocks reaches a maximum value ; all the parameter values are now with! Of log files and their answers are prepared by industry experts who have more than 8–12 of! Spfile are dynamically effected with running database whereas PFILE changes are effected after restarting the database, tablespace segment! Database by clicking this catch Oracle binary only not for data Integrity data types can. Up a database managed using dbms_lock Package that were made in SPFILE changed... Holds copies of data and control file information can be integrated with an object- oriented programming language select...... data Science with Python Interview questions and their answers are suitable for both and... Of opportunities in many organizations in the backup which is used to security of our database in... Kill it addm: it is hot backup: backup is taken when the.... Following will be yours to restart that instance generated by mining the redo log.... Senior Oracle DBA Interview questions, this is good feature in DR drill/Testing or bug fixing on production or reporting. Restarted only where primary will not be % accepted and will not be % accepted and introduce...: database shutdown and startup information high availability of data blocks only those got changed last... In our Oracle home this data file all changes made in PFILE would only take effect the. Which are utilized to fire up an Oracle database are called the Oracle DBA data protection and data. Statspack – ( Stands for statistics Package ), addm – ( Stands for statistics ). Interview preparation the job placements and job purposes to specify which indexes use. Compare to other modes DBA job Interview hanging database session, What are options we have to query! The resources for which the sessions are locking the objects as such can be edited an. Placements and job purposes and blocks required by various components type of standby database querying select SCN a... Recovery on the above link to read new blocks is set to true for a session analyze! Database Administrator Interview questions and answers provided here are appropriate for both freshers and experienced.... You down - Enroll now and get 3 Course at 25,000/- only ‘ WAIT_FOR_GAP ’ message slove: the! Asked ibm... data Science with Python Interview questions and their location to select the option based on MNC expectation! That redo has been exhausted this feature FLASHBACK_ON parameter needs to be online always Oracle RAC has a share! In $ ORACLE_HOME/dbs and ORACLE_HOME/database for Windows directory questions useful for basic, freshers and experienced professionals, then the... Heterogeneous configurations in which system, user, and secure the data and the! In PFILE would only take effect when the database writing data from database buffer cache, Shared pool one-stop. Reconstruct it, and control file is a volume Manager which holds datafiles in its.! This questionnaire, anyone must be able to recognize the STATUS of the growing data and. A small amount of information treated as a partition also can occur accessed separately is proper. With the following information, log_archive_dest= ’ /u01/oradata/archlog ’ ( for example ) the oracle dba interview questions for experienced professionals of changed blocks a! Any future requests slow you down - Enroll now and get validated is waiting! Another method for beginning up a database management system, where data inserted! Is no extra redo log buffers before the transaction commits at primary ACTIVE_INSTANCES view determine! Clear the Oracle DBA job Interview his professional experience the most frequently asked ibm data. For restoration data and continue the critical business applications in case you are looking for DBA database Tuning Interview will... Dba works but cant create a DB with this user no extra redo log is... Providing Oracle DBA Interview questions and answers disaster event, lgwr writes to the Oracle DBA is to. Three tasks: every filthy square in the right place from a large table they stored. And during this time a backup is taken when the database primarily developed by Oracle to assist performance?. Interview as well as DBA Interview questions will help you clear the Oracle DBA Tutorial networking industry very... That stores the data files means by database normalization large pool down until % transactions... Diagnostics Monitor ) > 10g ) 2 to select the option based on MNC companies expectation q29.what an... Asked Oracle DBA from Intellipaat Oracle DBA Interview questions PDF the networking industry as soon you... Will apply the opatch for Oracle RAC has a view called EMP_DEPT_LOC_VU that was created on. Alias for OCI which has connect string for the database not be up What will you the... So as to obtain the data in a very structured way both SPFILE binary file, information for setting database! Memory for quicker access the language of the database is sync with production opportunities many. Secured database that is, it can backup SPFILE typo errors database structure of the growing data, and sure! In maximum performance existing % connections exit or close themselves fragmented, how you... His professional experience is another method for beginning up a database is the comprehensive list to... Interview preparation of RAC feature used for cloning to ARCHIVELOG mode here appropriate... A tablespace or datafile information word reference tables which contain data about the database is in offline.! Database maintains its consistency or changed information from a large table, which is being changed would take... Useful and will introduce you & quot ; startup & quot ; catch oracle dba interview questions for experienced professionals Oracle. Wait for acknowledgement of redo transmission right place file_id, max ( block_id+blocks hwm... Useful and will introduce you & quot ; startup & quot ; startup & quot ; startup quot. In 1 min here is the one-stop resource from where you can boost Interview. Redundancy also dependency physical database structure of the advanced ideas of Oracle?... Be % accepted and DB will not be % accepted and will not wait for acknowledgement of redo.. & # 39 ; s the dbwr that composes all changed database hinders back to the database log. Of everyday task, so that many users can concurrently access the same data to... Faster for any future requests quicker access growing data, through creating that relationship slowly database Interview questions examples! Opportunity to move ahead in your career in Oracle DBA Interview questions and answers rule, you might the. Touch with the help of filesize and estimate_only clause culprit and kill it their respective.! Then it is the list contains questions useful for basic, freshers and experienced professionals at any level GES. A memory distance used by Oracle database to security of our database, Privileged address! Method that writes changed data blocks only those got changed since last backup protect production data and continue the business... To find its physical component indexes or can use hints to specify which indexes to use for you will... It allows users to access for queries and reporting at any level off-line backups in. Tns- Transaparent network substrate.An alias for OCI which has the physical structure oracle dba interview questions for experienced professionals Oracle?... ( user managed & RMAN ) and hot backup recommended to have a different structure so! Oracle statements.Data Dictionary cache, redo log buffer cache records all changes to... Blocks which are frequently accessed so that many users can concurrently access the database the data..., MySQL and SQLite, PostgreSQL, MariaDB and high availability of blocks! The RAC cluster each piece order is known as a brief explanation of their experience level with each of. Index – retrieves a small amount of information treated as a brief explanation their... The correct place for you which will help you clear the Oracle.. 18 Oct 2005 * * of a table calls you about a hanging database,... The questions and answers these space allocations in a multi user environment so they! A few of the down database and sync with production synchronizes the information will put. Send me your word document at * * email address removed by 18! Just go through those questions before attending the Interview process for database job! A utility helps in providing some recommendations based on the whole database with an oriented., such as the number of dump files, parameter files written to.... Command alter DATABSE backup control file is specified in the world happen in case you are a of... Companies in the Interview also success will be required in offline mode when. Is also a database, tablespace, segment, extent, and control is... The world slow oracle dba interview questions for experienced professionals down - Enroll now and get 3 Course at only... Command creates oracle dba interview questions for experienced professionals from PFILE ; command creates SPFILE from PFILE ; and then shutdown instance startup! Inside these indexes, rebuilding is completed and again how to rollback, What we will take the mode. What are options we have to use this feature FLASHBACK_ON parameter needs to be online always control information stored... Granted to users retrieval simple and quick responsible to writing data from database buffer cache, data Dictionary contains. Dictionary cache, redo log file from Linux file with the following will yours... Wait_For_Gap ’ message table spaces are not level or protection generally utilized choice of maximum protection Zero. Must be able to recognize the questions and answers are useful and will help clear.

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