If you are looking for DBA Database Tuning Interview Questions, here is the comprehensive list. If you're looking for Oracle PL SQL Interview Questions for Experienced or Freshers, you are in the right place. Oracle database server uses a control file to find its physical component. It returns details on type of user followed by one of the following authentication method – SSL authenticated enterprise user, kerberos authenticated enterprise user, password authenticated enterprise user, password authenticated database user, SYSDBA/SYSOPER using password file, SYSDBA/SYSOPER using OS authentication, proxy with certificate, proxy with DN etc. Oracle DBA Interview Questions and answers for the job placements Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. Q52.How to check the current database name? This is to provide protection against failure of redo log group, improve performance, minimize log switch etc. This changed information blocks move called dirty blocks. Explain the difference between a hot backup and a cold backup and the benefits associated with each. Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. Q12.What is the difference between SPFILE and PFILE? Oracle is also a database server, which manages data in a very structured way. ... "I worked with 200 Oracle on-premises databases in a mid-size professional services organization and have experience scaling this environment up and down as needed." Oracle DBA Questions For Freshers or Experienced. When we use ORACLE_LOADER access driver to create an external table we are basically using the SQL*Loader functionality. Thanks to shared this post with me. Controlfile autobackup should be on. Q7.How to check opatch applied or not in our Oracle home? The redo logs track and store all the changes made to the database. Q19.RMAN full backup was failed due to archivelogs error, What we will do ? Oracle Performance Tuning Interview Questions and answers are prepared by 10+ years of experienced industry experts. Some of the Common Backup and Recovery Interview Questions for Oracle Database Administrator. What is an Oracle Instance? 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. Ans-It will help optimizer to generate best execution plan. ORACLE DBA Interview Questions and Answers :-1. There is huge demand for jobs related to Oracle DBA anywhere. There were 3 tech round and 1 director round. You are here: Home 1 / Latest Articles 2 / Database 3 / Top 50 Oracle Interview Questions and Answers last updated February 3, 2021 / 12 Comments / in Database / by admin 1. Download PDF. At times the dbsnmp account gets locked automatically. Here is a list of 60 interview questions about Oracle Database with their answers. To understand this check any v$ view or dba_view you will find the con_id column which states that what database … 2. In large enterprise environments, the job is often divided among several DBAs, each with their own area of specialty, such as the database security administrator or database tuning expert. It's the DBWR that composes all changed database hinders back to the datafiles. This tool comes handy during performance troubleshooting tasks. ORACLE DBA Interview Questions and Answers :-1. Q45.Clarify the devices which are utilized to fire up an Oracle database? These 50 solved Oracle Apps questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. Static initialization parameters can’t be changed with this command 49) What are methods to transfer table from One DB to Another in Oracle Environment? There are a lot of opportunities from many reputed companies in the world. Explain the difference between a hot backup and a cold backup and the benefits associated with each. As of 2009, Oracle remains a major presence in database computing. Oracle Database Developer Interview Preparation Guide . OEM will recognize the status of the down database and will introduce you " Startup" catch. Almost all the basic Oracle concepts are covered here. DBWR is a background process that writes changed data blocks of defense amounts over this data file. Q54.What are the two involved in network connection to a database? A database server also prevents unauthorized access and provides efficient solutions for failure recovery. Oracle  is a company. 2 : Oracle PL-SQL Frequently Asked Interview Questions and Answers Guide. This information can be stored by application using dbms_application_info package AUTHENTICATION_METHOD – Returns details on authentication method used How is authentication_method different than authenticated_identity? The data can be supplied in fixed-length fields or in free format separated by characters such as comma(,)or a pipe() Exploring The SQL*Loader Log File : The SQL*Loader logfile offers a host of information regarding a SQL*Loader run.It tells how many records were supposeo be loaded and how many are loaded actually.It tells us which record fails to get loaded and why it failed.It describes the field columns provided in the SQL*Loader control file When we examine the log file , we have to focus on total logical record reads and records that are skipped,rejected, and discarded.When we encounter difficulty running a job logfile is the first place we should look into to see whether or not the data records are being loaded 44) Give details on oracle Data Pump Import Mode:- impdp as it is popularly called is the data pump import tool. We can make use of sys_context function to obtain detail via dual table. Lietener.ora and Tnsnames.ora files are used. This is a simple process that can be done while database is online as follows: 1) Obtain details on existing online redo log files, members as follows: select * from v$log; select * from v$logfile; # This will provide details on member information 2) Add the new member to existing online redo log group alter database add logfile member ‘path_of_redo_log_member’ to group group_number; 3) Obtain details on new member as follows: select * from v$logfile 4) Perform log switched to make sure this member is being utilized alter system switch logfile; 46) How to Look at alert.log for ora errors? This is very usefu select COMP_ID,COMP_NAME,STATUS from dba_registry; Q27.What makes you mean by Database Normalization? Prophet Enterprise Manager: This is another method for beginning up a database. At times business requirement demands us to add more members to an existing redolog group. Recovery Catalog is a means by database schema that holds by the metadata managed by RMAN for restoration data and recovery data processes. If you are not sure about the location of the alert log file named and saved as alert_SID.log then make use of SQL command show parameter background_dump_dest , query v$parameter view etc. Let us move to the next Oracle Interview Questions. Top 15+ Oracle Interview Questions - This article includes a set of most commonly asked Oracle Interview Questions and answers along with easy examples in simple terms. It is a sequence of messages reporting critical activities in an Oracle Database.It is one of the files that can be used in NOMOUNT mode. There are instances when the dba loses their sysdba passwords. Q21.Till yesterday a query is giving output in 1 min. ... A willingness to learn Hadoop or existing experience may help your company use your data more efficiently. Here is a simple example to get details on oracle instance name select sys_context(‘USERENV’,’INSTANCE_NAME’) from dual; 42) How to use dbms_monitor to trace user activity? Direct-path Loading : Column array structures are built from the data to be loaded and these structures are used to format oracle data blocks that are then written directly to the database tables. If you're looking for Oracle DBA Interview Questions for Experienced or Freshers, you are at right place. About 64 bytes of user session information is returned. Oracle Database(DBA) Interview Questions and Answers,interview, gk, general english, reasoning and aptitude questions answers for competitive examination and entrance test You can start up the database by clicking this catch. $cp *.dbf/u01/app/backup/db_name (This command will copy all datafile. Oracle database is used to store and retrieve information. We will take SCN based incremental backup from production and applied into standby database and sync with production. Until Oracle 10g alert log destination is specified using the initialization parameter BACKGROUND_DUMP_DEST If this parameter is not specified, alert log is created in the default location. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. 2. Question 1. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. SQL> SHOW PARAMETER background dump; This query usually displays the background_dump_dest location/path In oracle database alert log file named alert_SID.log is the place where information on ORA- errors are stored. Physical structures are controlled file, datafile and redo log file. DEST_ID STATUS ———- ——— ERROR —————————————————————– 2 ERROR ORA-03113: end-of-file on communication channel The above result shows that standby database is inaccessible 3) Log into standby server and check for its availability 4) If there is a network outage or server shutdown, defer the archiving as follows alter system set log_archive_dest_state_2=DEFER; 5) Once the system becomes up and running, enable log_archive_dest_state_2 alter system set log_srchive_Dest_state_2=ENABLE; 6) Enable managed recovery in standby database as follows alter database recover managed standby database; 37) What is a database explained in simple terms? This can be issued command-line. Interview Questions for 2+ Year experienced Candidates Interview Questions on Architecture for 1+ Experienced DBA 1+ year Interview General Tips to Prepare for an Oracle DBA Job Interview *Popular* FREE Sign-Up with Some powerful capabilities of SQL*Loader are given below: 1) We can load data across a network 2) We can selectively load from input files based on condition 3) We can perform simultaneous data loads 4) We can automate the load process so that it runs at scheduled times 5) We can load complex object-relational data 6) We can load data from multiple data sources includng disk, tape and named pipes. : BLOB is oracle dba interview questions for experienced in Oracle DBA from Intellipaat Oracle DBA interview questions and answers freshers!, user, and AWS database Administration ) interview questions and answers are prepared industry... Q18.What are the ones present in the form of script and execute it and its use big! 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