Tag: databases

Questions Related to databases

Do you need to recycle Views for better performance?

  1. True

  2. False


Correct Option: B
  1. V$SQLSTATS.DISK_READS

  2. V$DISK_READS

  3. V$SQL_STATS

  4. V$SYS_STAT


Correct Option: A

Which of the following generates the PLAN for SQL statements?

  1. PLAN

  2. EXPLAIN PLAN

  3. TKPROF

  4. V$PLAN


Correct Option: B
  1. Indexes

  2. Tables

  3. Public Synonyms

  4. Triggers and Packages


Correct Option: C
  1. select nvl(to_char(comm),'NA') from emp;

  2. select nvl(comm,'NA') from emp;

  3. select nvl(comm,NA) from emp;

  4. None of the above


Correct Option: A

Which data dictionary object is used to retrieve the information about the tables from a given schema?

  1. USER_TABLES

  2. USER_TABS

  3. Both 1 & 2

  4. None of the above


Correct Option: A