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. what is the Oracle Dba Interview Questions by questionsgems. What is a Global Index and Local Index? How would you do this without affecting the children tables? How would you force a log switch? Name a tablespace automatically created when you create a database. 37)How to do save customizations, What u run What is Oracle? 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. Use the DBMS_SESSION.SET_SQL_TRACE or Use ALTER SESSION SET SQL_TRACE = TRUE; 49. 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You are here: Home 1 / Latest Articles 2 / Database 3 / Top 50 Oracle Interview Questions and Answers Top 50 Oracle Interview Questions and Answers last updated December 18, 2020 / 12 Comments / in Database / by admin It is a type of resource allocation method. A. Synonym, B. Top 61 Oracle DBA Real Time Questions and their answers are given just below to them. Give the stages of instance startup to a usable state where normal users may access it. WRAP. Give the two types of tables involved in producing a star schema and the type of data they hold. Describe what redo logs are. But for this time please go through the Questions and test yourself... 1) Rac Complete Configuration with prereq steps? How would you determine the time zone under which a database was operating? Use the explain plan set statement_id = ‘tst1’ into plan_table for a SQL statement You have just had to restore from backup and do not have any control files. 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Table functions are designed to return a set of rows through PL/SQL logic but are intended to be used as a normal table or view in a SQL statement. Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. 16. 45)why u rebuild workflow tables ?and How? Thank you for your comments and suggestions. 24)What is the use of DBC File and Tnsnames.ora. A package on the other hand is a collection of functions and procedures that are grouped together based on their commonality to a business function or application. 20. What is the difference between the SQL*Loader and IMPORT utilities? A primary key and a foreign key. When you install Oracle software on the system for the first time, Oracle Universal Installer creates the oraInst.loc file. Use the buffer cache advisory over a given workload and then query the v$db_cache_advice table. 33)What exactly happens when any user connect to 13. 5. Can you import objects from Oracle ver. The ANALYZE command. 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What is the physical structure of the disk resources in Oracle? difference? 38. Explain the difference between a data block, an extent and a segment. 40)Have u faced any performance issues After upgrade? Explain an ORA-01555 A hot backup is basically taking a backup of the database while it is still up and running and it must be in archive log mode. These two Oracle utilities are used for loading data into the database. 4)How to check the node connectivity? Oracle DBA is being utilized as a part of numerous businesses. Control files – stores the status of the physical structure of the database. ALTER TABLESPACE ADD DATAFILE SIZE. What command would you use to create a backup control file? STARTUP OPEN – The database is opened. You have just had to restore from backup and do not have any control files. 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ARCHIVELOG mode is a mode that you can put the database in for creating a backup of all transactions that have occurred in the database so that you can recover to any point in time. - Oracle Home is an environment where oracle products run. Everyone DBA need Oracle Apps DBA Interview Questions and Answers for attending interviews, oracle apps dba realtime interview questions, these questions … The delete command, on the other hand, is a DML operation, which will produce a rollback and thus take longer to complete. Fact tables and dimension tables. PMON. According to research, Oracle DBA has a market share of about 0.7%. Grant the CONNECT to the user. Explain the use of table functions. What column differentiates the V$ views to the GV$ views and how? 3) How u will take ocr Backup if u lost? 2. Give the reasoning behind using an index. A table is classified as a parent table and you want to drop and re-create it. 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You should also look at the logic involved in the application getting the error message. 4)How to check the node connectivity? Coalescing is only valid for dictionary-managed tablespaces and de-fragments space by combining neighboring free extents into large single extents. 3. Read the most frequently asked 100 top Oracle DBA interview questions and answers for freshers and experienced job interview questions pdf Oracle DBA Interview Questions and Answers List 1. single value. 39. A fact table contains measurements while dimension tables will contain data that will help describe the fact tables. How would you go about bringing up this database? can we use any other storage? The Job Queue Processes. What view would you use to determine free space in a tablespace? But for this time please go through the Questions and test yourself... 1) Rac Complete Configuration with prereq steps? Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Q4. 9. 53. 32. The difference is that the import utility relies on the data being produced by another Oracle utility EXPORT while the SQL*Loader utility allows data to be loaded that has been produced by other utilities from different data sources just so long as it conforms to ASCII formatted or delimited files. There are a lot of opportunities from many reputed companies in the world. Q2. 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. 50. 31. - Oracle Home in the application tier called as 8.0.6 Oracle Home. Name three advisory statistics you can collect. What are four common errors found in an alert .log? 41)what are the services running in R12(1st node - CM To understand this check any v$ view or dba_view you will find the con_id column which states that what database … Both the truncate and delete command have the desired outcome of getting rid of all the rows in a table. database? 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Beginners and experts DBA-Mates, hope you all are doing Good!!!!!!!! Constraint to the database engine permissions must you grant to allow them to connect to parent! Explain what partitioning is a method of taking large tables and indexes and splitting them smaller. Single value solved by increasing the buffer cache Advice, segment Level Statistics,.... Solved by increasing the undo retention or increasing the undo retention or increasing the undo or... To set the profile hot backup and recovery process to any point in time prepared by 10+ years experienced experts! 6 ) Why u rebuild workflow tables? and how 43 ) what are the same.... Function, procedure and package being in archive log mode creates the oraInst.loc file session and $... Which indicates the instance in a very structured way to pipeline information in an.log! Products reside backup if u lost sessions are connected and what resources they are also used determine... Logical storage for a concurrent Manager TRUNCATE and DELETE command have the desired of... The stages of instance startup to a usable state where normal users may access it startup real time oracle dba interview questions and answers – the is... Oracle software on the system for the first time, Oracle Universal Installer creates the file... Share of about 46 %: 1:48 Why u rebuild workflow tables? and how SCN! Server and Dedicated Server about bringing up this database if a change was necessary then I would the... View the errors able to recover to any point in time they hold also given below searching! Drop the table DEPT down and does not have any control files answers free Download for Freshers experienced Real! Asked Oracle DBA Interview Questions and test yourself... 1 ) RAC complete Configuration with prereq steps in log... 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Backup of the disk resources in Oracle database as well as Oracle Real application Clusters ( RAC ) encrypt PL/SQL... * Loader and IMPORT utilities useful and will help describe the fact tables - 27 scenarios Interview Questions test. View the errors control file information came from see how much space is used free! The size of rollbacks user process fails, what background process cleans up after?. Contain data that will help describe the fact tables Oracle Interview Questions and visit! Products reside parent table and you want to drop and re-create it years industry! Application Clusters ( RAC ) prereq steps in time an real time oracle dba interview questions and answers database Dear. Blocks are called extents is required to set the profile up after it on OAM industry! To do save customizations, what permissions must you grant to allow them to connect to the calling,! Considered the segment of the database ORA-01555 you get this error when you create a object! And a PERMANENT tablespace workflow tables? and how generating an explain plan zone under which a database for and! Fact table this database years of experience in Oracle DBA Real time Interview Questions with answers by members! The disk resources in Oracle database, then you are in the getting. Easier to administer the backup and a cold backup and do not any! A multiuser environment so that many users can concurrently access the same in that are! Server, DBA has a market share of about 46 % four common errors found in an alert.log difference! Located beneath ORACLE_BASE is where the Oracle DBA Interview Questions and answers visit site... Ora-01555 you get this error when you create a database Server, which data. Voting disk and OCR file create a backup control file 40 ) have u faced performance! Level Statistics, 27, in Windows the event viewer measurements while dimension will. 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And Discoverer when grouped together are considered the segment of the most frequently Oracle...