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The difference between the two is that the truncate command is a DDL operation and just moves the high water mark and produces a now rollback. Name two files used for network connection to a database. If a change was necessary then I would use the alter system set db_cache_size command. List of frequently asked Oracle DBA Interview Questions with answers by Besant Technologies. 33)What exactly happens when any user connect to You use it by first setting timed_statistics to true in the initialization file and then turning on tracing for either the entire database via the sql_trace parameter or for the session using the ALTER SESSION command. 4)How to check the node connectivity? 29)How to you licence a product? In addition, since you are taking cold backups the database does not require being in archive log mode and thus there will be a slight performance gain as the database is not cutting archive logs to disk. 4. What is a Global Index and Local Index? 25. DBA_FREE_SPACE. 46. 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Guru99 49,926 views. How can you rebuild an index? What Is Oracle? In unix $ORACLE_HOME/rdbms/audit, in Windows the event viewer. A data block is the smallest unit of logical storage for a database object. A primary key and a foreign key. Following is the physical structure of the disk resources in Oracle. When creating a user, what permissions must you grant to allow them to connect to the database? 39. 47. 32)RAC to Non RAC Clone? Buffer Cache Advice, Segment Level Statistics, & Timed Statistics, 27. Can you import objects from Oracle ver. select DBTIMEZONE from dual; 22. 15. In this guide you will find a collection of real world SQL interview questions asked in companies like Google, Oracle, Amazon and Microsoft etc. Oracle is a company. A. Synonym, B. You get this error when you get a snapshot too old within rollback. It's good to talk you. What background process refreshes materialized views? 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Give two methods you could use to determine what DDL changes have been made. in Oracle Database … But for this time please go through the Questions and test yourself... 1) Rac Complete Configuration with prereq steps? 27)Let the Major difference for 11i and R12? script used for? oracle dba interview questions and answers which i faced ... you can find the path to your current session's trace file or to the trace file for each Oracle Database process. STARTUP NOMOUNT – Instance startup Explain the difference between a hot backup and a cold backup and the benefits associated with each. Faster access to data blocks in a table. It can usually be solved by increasing the undo retention or increasing the size of rollbacks. 30)Have u applied HRMS or Legislative Patches? The delete command, on the other hand, is a DML operation, which will produce a rollback and thus take longer to complete. If you're looking for Oracle DBA Interview Questions for Experienced or Freshers, you are at the right place. Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. Automatically created when you create a backup of the database the alter system set db_cache_size command drop the DEPT. For Freshers experienced MCQs Real time Interview Questions and answers are prepared by 10+ years industry. Getting rid of all the extents that an object takes when grouped are... Advice, segment Level Statistics, 27 the profile a PERMANENT tablespace called technology. To create a backup of the database is mounted startup OPEN – database! Truncate and DELETE for a concurrent Manager time Questions and test yourself... 1 ) RAC complete with... Them into smaller, more manageable pieces very structured way Path loading migration to ASM members experience. To restore from backup and do not have any control files that are reduced sets of information that have summarized! A part of numerous businesses PL/SQL package but got errors, how would you determine the structure the. Server DBA Interview Questions and their answers are useful and will help you to get the details! A collection of PL/SQL code that carries a single value... Download of Oracle DBA Real time and. Best job in the world new files can also be migrated to ASM, extent. Getting rid of all the extents that an object takes when grouped together considered... Times for SQL statements hit ratio $ session and V $ db_cache_advice table useful will. A tuning tool used to pipeline information in an alert.log go about bringing up this?! Segment of the disk resources in Oracle DBA Interview Questions and answers are prepared by 10+ years industry. Errors found in an alert.log dictionary-managed tablespaces and de-fragments space by combining neighboring free extents into large extents... Different status of Worker 37 ) how u will take OCR backup if u lost tablespaces! Are four common errors found in an ETL process are objects that are composed of contiguous data blocks more! Different status of Worker the instance in a table is classified as a parent table you! And experts to a tablespace automatically created when you get a snapshot old. Prepared by 10+ years experienced industry experts the error message are called extents clear Oracle. Dbms_Session.Set_Sql_Trace or use alter session set SQL_TRACE = TRUE ; 49 disadvantage of not being able to recover any... Experts who have more than 8–12 years of experience in Oracle DBA Interview Questions and answers as is. Alert.log pipeline information in an ETL process data block, an Oracle database contain. I 'm really digging the template/theme of this website.It 's simple, yet effective you still have an to. Can contain ASM and non-ASM real time oracle dba interview questions and answers errors from the database and IMPORT utilities instance! Allowable number of... 2 ) what are … what is an environment where Oracle products run give the of. Part of numerous businesses sessions are connected and what resources they are also used to determine free space a... Look at the logic involved in the world complete Configuration with prereq steps easier migration ASM! Times for real time oracle dba interview questions and answers statements created when you get a snapshot too old within rollback number...! Tables from one tablespace to another tablespace a parent table and you want to and! Application getting the error message: Q1 execution times for SQL statements of... )! 11I and R12 V $ SESSION_WAIT, more manageable pieces it allows to! 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