Oracle DBA Interview Questions and Answers

 


Q30) How can we monitor these space allocations in a database?

Answer: 


Q31) Defined by Recovery Catalog?

Answer: Recovery Catalog is a means by database schema that holds by the metadata managed by RMAN for restoration data and recovery data processes.

Q32) What is means by Database Writer?

Answer: DBWR is a background process that writes changed data blocks of defense amounts over this data file. This changed information blocks move called dirty blocks.

Q33) What are the specific disk components?

Answer: 

  • Data files
  • Redo Logs
  • Control files
  • Password files and
  • Parameter files

Q34) What is mean by Oracle DBA PGA?

Answer: PGA is a memory distance used by Oracle database. It is expected to save session specific information.

Q35) When effects DBWR write to the data file?

Answer: 

  • When checkpoint occurs
  • When number from infected blocks provides a threshold
  • Every three moments due to timeout
  • When the server method demands free space in buffer cache to read new blocks.

Q36) What is defined by System Change Number?

Answer: SCN is an ID that Oracle makes to every transaction. It is recorded including those corresponding variety into a redo approach.Read More Oracle DBA Training

Q37)  What is the significance of Oracle DBA?

Answer: The Oracle Certified Professional (OCA/OCP) Database Administrator (DBA) accreditation is intended to reflect capability in Oracle database engineering, establishment, organization, execution tuning, and investigating.

Q38) What is Oracle and what is it utilized for?

Answer: An Oracle database is an accumulation of information treated as a unit. The motivation behind a database is to store and recover related data. … Oracle Database is the primary database intended for big business framework figuring, the most adaptable and practical approach to oversee data and applications.

Q39) Clarify the devices which are utilized to fire up an Oracle database?

Answer: You can start up a database with three devices.
SQL*Plus: This is the most generally utilized choice. You initially associate with an inactive case with SQL*Plus and after that startup the case with "startup" direction.
Prophet Enterprise Manager: This is another method for beginning up a database. You can sign in to Oracle Enterprise Manager regardless of whether the database is halted. OEM will recognize the status of the down database and will introduce you " Startup" catch. You can start up the database by clicking this catch.
RMAN: This is somewhat a less utilized instrument for beginning up a database yet it is conceivable to fire up a database from the Recovery Manager direction line.

Q40)  What is Tablespace?

Answer: Prophet utilizes Tablespace for consistent information Storage. Physically, the information will get put away in Data documents. Information records will be associated with the tablespace. Table space can have numerous information documents. A tablespace can have objects from various outline's and construction can have numerous tablespace's. The database makes " Framework tablespace" as a matter of course amid database creation. It contains read-just information word reference tables which contain data about the database.Know More Oracle DBA Online Course





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