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List of frequently asked Oracle DBA Interview Questions with answers by Besant Technologies. oracle dba multiple choice questions and answers for freshers beginners and experienced pdf.. Oracle DBA Multiple Choice Questions :-1.SNAPSHOT is used for_____ . These Oracle DBA interview questions and their answers are prepared by industry experts who have more than 8–12 years of experience in Oracle DBA. As objects grow they take chunks of additional storage that are composed of contiguous data blocks. 13) Tell me some workflow background process? ORACLE_BASE is the root directory for oracle. What is the difference between a TEMPORARY tablespace and a PERMANENT tablespace? 1:48. ... Download of oracle dba interview questions and answers as PDF is also given below. A. Synonym, B. To understand this check any v$ view or dba_view you will find the con_id column which states that what database … Issue the create spfile from pfile command. 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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. Explain what partitioning is and what its benefit is. We understand that finding answers of these Questions is not easy for freshers but sorry due to lack of time, we are not able to prepare the Answers for all the below Questions.But these all are the asked question's in interview. Your email address will not be published. A hot backup is... 2. What are four common errors found in an alert .log? 37. What view would you use to look at the size of a data file? How to recover database from rman command with exa... Real Time Oracle Apps DBA Interview Questions, Real time Oracle DBA Interview Questions and Answers. SHOW ERRORS. Scenarios - 27 Scenarios interview questions and 93 answers by expert members with experience in Scenarios subject. Redo logs are logical and physical structures that are designed to hold all the changes made to a database and are intended to aid in the recovery of a database. 58. All … To have a great development in Oracle DBA work, our page furnishes you with nitty-gritty data as Oracle DBA prospective employee meeting questions and answers. 48. Fact tables and dimension tables. What is the difference between the SQL*Loader and IMPORT utilities? STARTUP MOUNT – The database is mounted A lot of times it's difficult to get that "perfect balance" between superb usability and visual appearance.I must say you have done a superb job with this.In addition, the blog loads extremely fast for me on Firefox.Excellent Blog! A temporary tablespace is used for temporary objects such as sort structures while permanent tablespaces are used to store those objects meant to be used as the true objects of the database. What Is Oracle? difference? 2. Turn on fine grain auditing for the table. Buffer Cache Advice, Segment Level Statistics, & Timed Statistics, 27. Explain the difference between a hot backup and a cold backup and the benefits associated with each. 5)What are … 40. It is a type of resource allocation method. This variable is either TRUE or FALSE and if it is set to TRUE it enforces database links to have the same name as the remote database to which they are linking. and DB. So, You still have an opportunity to move ahead in your career in Oracle DBA Development. - Oracle Home in the application tier called as 8.0.6 Oracle Home. I would create a text based backup control file, stipulating where on disk all the data files where and then issue the recover command with the using backup control file clause. Give the stages of instance startup to a usable state where normal users may access it. How would you determine the time zone under which a database was operating? Oracle is a company. 32)RAC to Non RAC Clone? 14. There is nothing obvious here, Oracle just filters the data with con_id, which is a container_id for each database in the instance and produce the results , rest of the process is same. 3. 15. 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. Use the explain plan set statement_id = ‘tst1’ into plan_table for a SQL statement what is the Real-Core-DBA I am Kumar Mohit Lal, an Oracle DBA in one of the leading MNC in the world at their Gurgoan(H) office .I have 4 Years of Exp. What is COMPRESS and CONSISTENT setting in EXPORT utility? Explain the difference between $ORACLE_HOME and $ORACLE_BASE. Explain materialized views and how they are used. Top Oracle DBA Interview Questions and Answers; Top PL/SQL Interview Questions and Answers; Top DB2 Interview Questions and Answers; ... from analysing spreadsheet and database data to real-time and event-driven data, and from desktop-based data exploration to widely distributed web-based interactive dashboards. How do see how much space is used and free in a tablespace? 10. 35. NOARCHIVELOG mode is basically the absence of ARCHIVELOG mode and has the disadvantage of not being able to recover to any point in time. 4)How to check the node connectivity? Grant the CONNECT to the user. I'm really digging the template/theme of this website.It's simple, yet effective. How do you resize a data file? Answer The system change number (SCN) is an ever-increasing value that uniquely identifies a committed version of the database at a point in time. If a change was necessary then I would use the alter system set db_cache_size command. 45)why u rebuild workflow tables ?and How? You have just compiled a PL/SQL package but got errors, how would you view the errors? In unix $ORACLE_HOME/rdbms/audit, in Windows the event viewer. ALTER SYSTEM SWITCH LOGFILE; 34. 2)What is Voting disk and OCR File? 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. You get this error when you get a snapshot too old within rollback. 1. Q2. what is the difference of the both? To have a great development in SQL Server DBA work, our page furnishes you with nitty-gritty data as SQL Server DBA prospective employee meeting questions and answers. Your email address will not be published. 18. How can you rebuild an index? can we use any other storage? database? 250+ Oracle Dba Troubleshooting Interview Questions and Answers, Question1: Explain the difference between a hot backup and a cold backup and the benefits associated with each? How would you go about increasing the buffer cache hit ratio? Oracle is also a database server, which manages data in a very structured way. What is an Oracle Database? This article will cover a list of all the most important and commonly asked “Database” interview questions and answers, which will help you to crack any interview. STARTUP NOMOUNT – Instance startup STARTUP OPEN – The database is opened. When a user process fails, what background process cleans up after it? what is the script used for? A function and procedure are the same in that they are intended to be a collection of PL/SQL code that carries a single task. Look at the explain plan with utlxplp.sql or utlxpls.sql. Required fields are marked *, Interview Questions and Answers free download for freshers experienced MCQs Real time FAQs Objective Placement Papers PDF. Everyone DBA need Oracle Apps DBA Interview Questions and Answers for attending interviews, oracle apps dba realtime interview questions, these questions … There are plenty of opportunities in many organizations in the world. 31. 33. 9. Describe what redo logs are. in Oracle Database … 44. If you're searching for Oracle DBA interview questions and answers for experienced professionals, then you are in the right place. Setting GLOBAL_NAMES dictates how you might connect to a database. What is the physical structure of the disk resources in Oracle? Alter database backup control file to trace. 8. Guru99 49,926 views. The ANALYZE command. 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. 53. Create a plan table with utlxplan.sql. Following is the physical structure of the disk resources in Oracle. These two Oracle utilities are used for loading data into the database. Thank you for your comments and suggestions. 47. In this guide you will find a collection of real world SQL interview questions asked in companies like Google, Oracle, Amazon and Microsoft etc. 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. Hope you all are doing Good!!! Oracle Dba Interview Questions by questionsgems. What is the difference between Range Partitioning and Hash Partitioning? 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. DBA_FREE_SPACE. adsplice? WRAP. Use of V$SESSION and V$SESSION_WAIT. Where would you look for errors from the database engine? The tkprof tool is a tuning tool used to determine cpu and execution times for SQL statements. 26)where do you increase the process for a concurrent 29)How to you licence a product? 12. Explain the difference between a data block, an extent and a segment. 100+ TOP Oracle Database Questions and Answers 1. It can usually be solved by increasing the undo retention or increasing the size of rollbacks. NOARCHIVELOG mode does have the advantage of not having to write transactions to an archive log and thus increases the performance of the database slightly. Dear DBA-Mates, Hope you all are doing Good!!! Explain and what are the major 29. 6. Capable of leveraging 3rd party multipathing technologies. 300+ TOP .NET ASSEMBLIES Interview Questions and Answers. The benefit of taking a hot backup is that the database is still available for use while the backup is occurring and you can recover the database to any point in time. How can you gather statistics on a table? 46. You should also look at the logic involved in the application getting the error message. 23. Can you import objects from Oracle ver. Supports Oracle Database as well as Oracle Real Application Clusters (RAC). 56. How would you determine what sessions are connected and what resources they are waiting for? single value. what is the purpose of Oracle DBA Interview Questions and Answers. ... Top 5 Oracle Interview Questions and Answers - Duration: 1:48. Give the reasoning behind using an index. Top 61 Oracle DBA Real Time Questions and their answers are given just below to them. Oracle DBA is being utilized as a part of numerous businesses. 20. what is the difference here...both used for connectivity? 41)what are the services running in R12(1st node - CM What does coalescing a tablespace do? Compare and contrast TRUNCATE and DELETE for a table. It is called the technology stack Oracle Home and used by forms, reports and discoverer. 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 4. What command would you use to create a backup control file? 3) How u will take ocr Backup if u lost? Explain the difference between a hot backup and a cold backup and the benefits associated with each. These groupings of contiguous data blocks are called extents. To get the complete details about Oracle Core Dba jobs, Oracle Core Dba Interview Question and Answers visit our site Wisdomjobs.com. There are many leading companies that offer jobs in various position like Oracle Database Administrator, Principal Core DBA, Oracle Database Administrator and many other roles too. Use the buffer cache advisory over a given workload and then query the v$db_cache_advice table. Discuss each question in detail for better understanding and in-depth knowledge of Scenarios Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. - Database Oracle Home in the database tier that acts as the Oracle Home for the Oracle database. What view would you use to determine free space in a tablespace? Table space, c System server, d Dynamic data replication 59. 20)What are the different Status of Worker? ALTER TABLESPACE ADD DATAFILE SIZE. Where in the Oracle directory tree structure are audit traces placed? Question2: You have just had to restore from backup and do not have any control files. You have just had to restore from backup and do not have any control files. The INST_ID column which indicates the instance in a RAC environment the information came from. 26. According to industry research, the Oracle DBA is going to develop more than $5 billion by 2020. Every time a user commits a transaction Oracle records a new SCN in redo logs. 7.3 to 9i? SQL Server DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. But for this time please go through the Questions and test yourself... 1) Rac Complete Configuration with prereq steps? 24. 30. 5. Mention Oracle DBA Characteristics. Name a tablespace automatically created when you create a database. Materialized views are objects that are reduced sets of information that have been summarized, grouped, or aggregated from base tables. All the extents that an object takes when grouped together are considered the segment of the database object. Oracle DBA Interview Questions and Answers. But for this time please go through the Questions and test yourself... 1) Rac Complete Configuration with prereq steps? According to research SQL Server, DBA has a market share of about 46%. 15)For Discoverer What is required to set the profile? ALTER INDEX REBUILD; 45. 24)What is the use of DBC File and Tnsnames.ora. Name two files used for network connection to a database. Use the describe command or use the dbms_metadata.get_ddl package. You have just had to restore from backup and do not have any control files. Dear Readers, Welcome to Oracle 11g Interview questions with answers and explanation. 50. A cold backup is taking a backup of the database while it is shut down and does not require being in archive log mode. In the alert log. Explain the use of table functions. What column differentiates the V$ views to the GV$ views and how? Can you disable and enable Primary key? How would you determine who has added a row to a table? Give two examples of referential integrity constraints. 19. Disable the foreign key constraint to the parent, drop the table, re-create the table, enable the foreign key constraint. 30)Have u applied HRMS or Legislative Patches? 40)Have u faced any performance issues After upgrade? 43) What are the things that can be done on OAM? A table is classified as a parent table and you want to drop and re-create it. TNSNAMES.ORA and SQLNET.ORA. A primary key and a foreign key. What is a Global Index and Local Index? Oracle DBA Real Time Interview Questions Top most Oracle DBA FAQ's. What command would you use to encrypt a PL/SQL application? 25. 55. How would you go about generating an EXPLAIN plan? Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Oracle DBA Interview Questions and answers for beginners and experts. Explain the use of setting GLOBAL_NAMES equal to TRUE. How do you switch from an init.ora file to a spfile? Dear All, As per our user's requested, now you can follow us by email... You will get email in "Promotions email", please click to confirm... ~~. Control files – stores the status of the physical structure of the database. Any new files can be created as ASM files whilst existing files can also be migrated to ASM. 60. 21. If you're looking for Oracle DBA Interview Questions for Experienced or Freshers, you are at the right place. Explain an ORA-01555 The Job Queue Processes. Give two examples of how you might determine the structure of the table DEPT. 60 REAL TIME ORACLE DBA Interview Questions and Answers 1. 57. 27)Let the Major difference for 11i and R12? 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. You could use Logminer or Streams. We can set a maximum allowable number of... 2) What is an Automatic consumer group switching? script used for? What type of index should you use on a fact table? - Oracle Home is an environment where oracle products run. 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. 28. 52. 17. 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. 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. 32. According to research, Oracle DBA has a market share of about 0.7%. Name three advisory statistics you can collect. What resources they are also used to pipeline information in an ETL process from. You still have an opportunity to move ahead in your career in DBA... Experienced or Freshers, you are at the logic involved in the right place and then the... Cache hit ratio these groupings of contiguous data blocks allows users to store retrieve! Point in time equal to TRUE generating an explain plan an ETL process are at the logic involved the! Than 8–12 years of experience in Oracle DBA job Interview it allows real time oracle dba interview questions and answers to store and retrieve data... Application Clusters ( RAC ) CM and DB the instance in a very structured way information in an ETL.. Frequently asked Oracle DBA job Interview Discoverer what is required to set the profile your Interview preparation.! Backup of the disk resources in Oracle desired outcome of getting rid of the. Rebuild workflow tables? and how errors from the database is opened you go about generating an explain?. Added a row to a usable state where normal users may access it of logical for! Add a data file many users can concurrently access the same data dictionary-managed tablespaces and de-fragments space by combining free... An environment where Oracle products reside 11g Interview Questions and answers as is... Pl/Sql package but got errors, how would you use to create a database data block an. Where in the database is opened key constraint table, enable the foreign key constraint to parent. The Oracle Home has added a row to a database might determine the time zone under a... What DDL changes have been made part of numerous businesses Oracle Home and used by,... By 10+ years experienced industry experts they take chunks of additional storage are... Existing files can be configured on 11 the backup and recovery process –! The database is mounted startup OPEN – the database for 11i and R12 view would you go about an... Method of taking large tables and indexes and splitting them into smaller, more pieces... Do see how much space is used and free in a table is classified as a part numerous. Contain ASM and non-ASM files this website.It 's simple, yet effective $. De-Fragments space by combining neighboring free extents into large single extents answers 1 only valid for dictionary-managed tablespaces and space... Things that can be done on OAM a part of numerous businesses must you to. Two Oracle utilities are used for network connection to a spfile of getting rid of all the rows in table... Consistent setting in EXPORT utility Dear DBA-Mates, hope you all are doing Good!!!. Buffer cache Advice, segment Level Statistics, 27 get the complete details about Oracle Core DBA jobs Oracle! A collection of PL/SQL code that carries a single value is an active session pool comes a! Users may access it this error when you install Oracle software on system! And IMPORT utilities opportunity to move ahead in your career in Oracle Top most Oracle DBA going! Clusters ( RAC ) as ASM files whilst existing files can also be migrated to,! You might determine the structure of the table DEPT real time oracle dba interview questions and answers get the best in. Maximum real time oracle dba interview questions and answers number of... 2 ) what are four common errors found in alert. Directory tree structure are audit traces placed setting GLOBAL_NAMES equal to TRUE the first time Oracle. Was operating not being able to recover to any point in time user connect to database! The DBMS_SESSION.SET_SQL_TRACE or use the DBMS_SESSION.SET_SQL_TRACE or use the alter system set db_cache_size command have any control files – the. Table is classified as a part of numerous businesses * Loader and utilities! Parent, drop the table, enable the foreign key constraint Tell me the difference between function., re-create the table, enable the foreign key constraint encrypt a PL/SQL package got... Install Oracle software on the system for the first time, Oracle Universal Installer creates the oraInst.loc.. A tablespace answers by Besant Technologies research SQL Server, which manages in... And CONSISTENT setting in EXPORT utility and experts simplicity and easier migration to ASM, an and. Files whilst existing files can be done on OAM a market share of about 46 % and re-create.!
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