Q.1
Which of the following locks the item from access of any type?
Q.2
The size of a lock is called:
Q.3
A cursor type in which the application sees the data as they were at the time the cursor was opened is called:
Q.4
Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?
Q.5
The advantage of optimistic locking is that:
Q.6
Dirty read, nonrepeatable, and phantom reads are not possible in this instance.
Q.7
A transaction in which either all of the database actions occur or none of them do is called:
Q.8
What is the overall responsibility of the DBA?
Q.9
Locks placed by the DBMS are called ________ .
Q.10
Which of the following refers to a cursor type that when the cursor is opened, a primary key value is saved for each row in the recordset; when the application accesses a row, the key is used to fetch the current values of the row?
Q.11
Which of the following refers to a cursor type where changes of any type and from any source are visible?
Q.12
A cursor type in which the application can only move forward through the recordset is called:
Q.13
Which of the following occurs when one transaction reads a changed record that has not been committed to the database?
Q.14
Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?
Q.15
Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads?
Q.16

When one transaction reads a changed record that has not been committed to the database a filthy read occurs.

  • True
  • False
Q.17

The size of a lock is referred to as lock sizing.

  • True
  • False
Q.18

When two transactions are being processed against the database at the same time they are termed concurrent transactions.

  • True
  • False
Q.19

Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?

  • Nonrepeatable read
  • Phantom read
  • Dirty read
  • Consistent read
Q.20

Dirty read, nonrepeatable, and phantom reads are not possible in this instance.

  • Read committed
  • Read uncommitted
  • Repeatable read
  • Serializable
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