Oracle Dba Interview Question and Answers

71. What are the components of SGA?
 
    SGA is used to store shared information. It includes
  • Buffer cache
  • Log buffer
  • Shared pool
  • Large pool
  • Java pool.
 
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72. What is a synonym?
  A synonym is simply an alias to another object in the database. This object can be a table, view, sequence or program unit.
 
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73. What is archive log file?
  Archive log file stores redo log information persistentiy. A redo log is overwritten with time;therefore,archive log maintains that lost information.
 
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74. What is a backup set?
  Backup set is a logical grouping of backup files that are created when you issue an RMAN backup command. It is RMAN’s name for a collection of files associated with a backup. A backup set is composed of one or more backup pieces.
 
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75. What does database tier consist of?
  Database tier consists of Oracle database, which stores all the data. The database server contains Oracle Home and data files.
 
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