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Which two files are used during operation of the DBMS?

  • A.Query languages and utilities
  • B.DML and query language
  • C.Data dictionary and transaction log
  • D.Data dictionary and query language

Answer: C

Correct answer: Data dictionary and transaction log

The data dictionary is consulted for the description of every object referred to, and the transaction log is written for every change so that recovery is possible. Both are in use continuously while the system runs.

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