Oracle 13c cloud control agent installation

OMS Server: Where runs the Enterprise Manager Middleware Client Server: Where we’re going to install the agent 1.Pre-requisites setup to be done in Client Server Create directory where agent will be installed in Client Server In Client,You need to create a directory or mount point as /u01/oemcc Install telnet in Client Server yum install telnetContinue reading Oracle 13c cloud control agent installation

Oracle user role and privilege interview questions

 Answer Credit:- https://www.linkedin.com/in/skantali/ https://www.linkedin.com/in/hemant-shahi-59921762/ How we can execute PLSQL without any privilege to change it What are the default user created when Oracle is installed ? Can you create password less user in Oracle ? If yes how ? How we can see the procedure /package body with out having privilege to execute it HowContinue reading Oracle user role and privilege interview questions

Oracle PGA (Program Global Area) in 12c

What is PGA The Program Global Area (PGA) is a private memory region that contains the data and control information for a server process. Only a server process can access the PGA. Oracle Database reads and writes information in the PGA on behalf of the server process. An example of such information is the run-timeContinue reading Oracle PGA (Program Global Area) in 12c

Database Architecture Interview Questions

What are base tables? When and how they will get created? Ans:-Are read-only tables(Data Dictionary Tables) that hold information about the database. Base tables are own by SYS. When and how they will get created? They get created when the database is built. https://docs.oracle.com/cd/B19306_01/server.102/b14220/datadict.htm Why to execute catproc.sql script? Ans:-Used to create and recreate databaseContinue reading Database Architecture Interview Questions

EXPDP IMPDP Datapump interview questions

1.What are new features of datapump in 12c? https://oracle-base.com/articles/12c/data-pump-enhancements-12cr1 2.which case we need to use flashback_time or flashback_scn parameter? If you need consistent backup for example when you do initial load using datapump for golden gate. 3.During impdp with full=y caluse , do we need to create user before import? No.User will be automatically created.Continue reading EXPDP IMPDP Datapump interview questions

Generic DBA

Listener related questions:- Answer Credit:- https://www.linkedin.com/in/saibal-ghosh-ccsk-prince2-%C2%AE-469b0a7/ 1.Can we manually force a particular scan ip (out of the three) to relocate on a particular host (lets say – on node 5 of 5 node RAC) ? Ans:- srvctl relocate scan_LISTENER -i 1 -n node1 $ srvctl relocate scan -h Usage: srvctl relocate scan -i <ordinal_number> [-nContinue reading Generic DBA

Clustering Factor and it’s effect on non-assm and assm tablespace

Clustering Factor and it’s effect on non-assm and assm tablespace. The clustering factor is a measure of the ordernesss of an index in comparison to the table that it is based on. It is used to check the cost of a table lookup following an index access (multiplying the clustering factor by the index’s selectivityContinue reading Clustering Factor and it’s effect on non-assm and assm tablespace

Index in 12c by example test case

A. B-Tree Indexes I have discussed more details in the below blog. Index internal oracle using simple test case B.Invisible Indexes Deciding which columns to index is hard. The primary key is automatically indexed, the foreign keys should also be indexed, but then what? Even more difficult is deciding which index to remove that mightContinue reading Index in 12c by example test case