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MCQs

Total Questions : 44 | Page 3 of 5 pages
Question 21. A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 22. An increasingly popular option for data distribution as well as for fault tolerance of any database is to store a separate copy of the database at each of two or more sites.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 23. The purpose of timestamping is to avoid the use of locks.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 24. Data replication is favored where most process requests are read-only and where the data are relatively static.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 25. The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 26. The semijoin approach saves network traffic.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 27. The problem of concurrency control is more complex in a distributed database.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 28. In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 29.  A distributed database has which of the following advantages over a centralized database?
  1.    Software cost
  2.    Software complexity
  3.    Slow Response
  4.    Modular growth
 Discuss Question
Answer: Option D. -> Modular growth
Question 30.  An autonomous homogenous environment is which of the following?
  1.    The same DBMS is at each node and each DBMS works independently.
  2.    The same DBMS is at each node and a central DBMS coordinates database access.
  3.    A different DBMS is at each node and each DBMS works independently.
  4.    A different DBMS is at each node and a central DBMS coordinates database access.
 Discuss Question
Answer: Option A. -> The same DBMS is at each node and each DBMS works independently.

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