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MCQs

Total Questions : 64 | Page 2 of 7 pages
Question 11. A transaction in which either all of the database actions occur or none of them do is called:
  1.    atomic.
  2.    consistent.
  3.    isolated.
  4.    durable.
 Discuss Question
Answer: Option A. -> atomic.
Question 12. A cursor type in which the application can only move forward through the recordset is called:
  1.    forward only.
  2.    static.
  3.    keyset.
  4.    dynamic.
 Discuss Question
Answer: Option A. -> forward only.
Question 13. Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?
  1.    Read committed
  2.    Read uncommitted
  3.    Repeatable read
  4.    Serializable
 Discuss Question
Answer: Option B. -> Read uncommitted
Question 14. Which of the following locks the item from access of any type?
  1.    Implicit lock
  2.    Explicit lock
  3.    Exclusive lock
  4.    Shared lock
 Discuss Question
Answer: Option C. -> Exclusive lock
Question 15. The size of a lock is called:
  1.    implicit lock
  2.    lock granularity
  3.    exclusive lock
  4.    shared lock
 Discuss Question
Answer: Option B. -> lock granularity
Question 16. What is the overall responsibility of the DBA?
  1.    Facilitate the development and use of the database
  2.    Create and populate tables
  3.    Development, operation, and maintenance of the database and its applications
  4.    Both the first and third answers above are correct.
 Discuss Question
Answer: Option D. -> Both the first and third answers above are correct.
Question 17. A cursor type in which the application sees the data as they were at the time the cursor was opened is called:
  1.    forward only
  2.    static
  3.    keyset
  4.    dynamic
 Discuss Question
Answer: Option B. -> static
Question 18. Locks placed by the DBMS are called ________ .
  1.    implicit locks
  2.    explicit locks
  3.    exclusive locks
  4.    shared locks
 Discuss Question
Answer: Option A. -> implicit locks
Question 19. Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 20. The overall responsibility of the DBA is to facilitate the development and use of the database.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True

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