Managing Multiuser Databases - General Questions

1.

Locks placed by the DBMS are called ________ .

A.	implicit locks
B.	explicit locks
C.	exclusive locks
D.	shared locks

Answer: Option A

Explanation:

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2.

What is the overall responsibility of the DBA?

A.	Facilitate the development and use of the database
B.	Create and populate tables
C.	Development, operation, and maintenance of the database and its applications
D.	Both the first and third answers above are correct.

Answer: Option D

Explanation:

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3.

A cursor type in which the application sees the data as they were at the time the cursor was opened is called:

A.	forward only.
B.	static.
C.	keyset.
D.	dynamic.

Answer: Option B

Explanation:

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4.

The size of a lock is called:

A.	implicit lock.
B.	lock granularity.
C.	exclusive lock.
D.	shared lock.

Answer: Option B

Explanation:

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5.

Which of the following locks the item from access of any type?

A.	Implicit lock
B.	Explicit lock
C.	Exclusive lock
D.	Shared lock

Answer: Option C

Explanation:

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6.

Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?

A.	Read committed
B.	Read uncommitted
C.	Repeatable read
D.	Serializable

Answer: Option B

Explanation:

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7.

Which of the following occurs when one transaction reads a changed record that has not been committed to the database?

A.	Nonrepeatable read
B.	Phantom read
C.	Dirty read
D.	Consistent read

Answer: Option C

Explanation:

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8.

A cursor type in which the application can only move forward through the recordset is called:

A.	forward only.
B.	static
C.	keyset
D.	dynamic.

Answer: Option A

Explanation:

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