Question 1 of 25
Hints left: 3
Q1
Database administration refers to a function that applies to the entire organization.
Q2
The size of the lock is referred to as the lock granularity.
Q3
A cursor type in which the application sees the data as they were at the time the cursor was opened is called:
Q4
Locks placed by the DBMS are explicit locks.
Q5
An ACID transaction is one that is atomic, consistent isolated, and durable.
Q6
The size of a lock is called:
Q7
The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B.
Q8
A phantom read occurs when a transaction rereads data it has previously read and finds modifications or deletions caused by a committed transaction.
Q9
What is the overall responsibility of the DBA?
Q10
A transaction is a series of actions to be taken on the database so that either all of them are performed successfully or none of them are performed at all.
Q11
Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?
Q12
When two transactions are being processed against the database at the same time they are termed concurrent transactions.
Q13
In optimistic locking, the assumption is made that conflict will occur.
Q14
Locks placed by command are implicit locks.
Q15
The goal of database security is to ensure that only authorized users can perform authorized activities at authorized times.
Q16
When one transaction reads a changed record that has not been committed to the database a filthy read occurs.
Q17
The overall responsibility of the DBA is to facilitate the development and use of the database.
Q18
The size of a lock is referred to as lock sizing.
Q19
Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed.
Q20
A durable transaction is one in which all committed changes are permanent.
Q21
Two transactions that run concurrently and generate results that are consistent with the results that would have occurred if they had run separately are referred to as serializable transactions.
Q22
Which of the following locks the item from access of any type?
Q23
Locks placed by the DBMS are called ________ .
Q24
The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images.
Q25
A point of synchronization between the database and the transaction log is generally referred to as a stop point.