MYSQL 1Z0-874 Actual Tests : MySQL 5.0 Database Administrator Certified Professional Exam, Part II

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MYSQL 1Z0-874 Exam Syllabus Topics:

MYSQL MySQL 5.0 Database Administrator Certified Professional Exam, Part II Sample Questions:

1. It is important to analyze queries that involve joins with EXPLAIN because...

A) Joins have the potential to cause more server processing if not defined correctly.
B) Joins are more prone to mistakes.
C) Using EXPLAIN before executing the query helps the server prepare the statements used.

2. The account 'ulf'@'localhost' has previously been created with the statement
GRANT ALL PRIVILEGES ON *.* TO 'ulf'@'localhost' IDENTIFIED BY 'w01f' This account should no longer be used, so you issue the following command:
REVOKE ALL PRIVILEGES ON *.* FROM 'ulf'@'localhost'
After executing this statement, you inspect the server and find that no clients are connected using that account. However, the next day you notice that the account 'ulf'@'localhost' is indeed connected to the server. Why is it still possible for the account 'ulf'@'localhost' to connect to the server?

A) The ON *.* clause should not be specified when disabling an account
B) Specifying GRANT ALL PRIVILEGES ON *.* effectively created an administrator account, which cannot be disabled through the REVOKE statement
C) The REVOKE command was not followed by a FLUSH PRIVILEGES command, so the account was never actually disabled
D) The REVOKE statement used does not remove the USAGE privilege from the account, allowing new connections with that account.

3. Is it a good idea to do periodic table rebuilds for InnoDB tables? Why?

A) Yes, because the table may become fragmented after many INSERTs and DELETEs.
B) No, because there is a risk for data corruption.
C) No, because the indexes have to be rebuilt.
D) Yes, because it flushes the logs and frees memory.

4. What are reasons to prefer using GRANT and REVOKE statements over editing the privilege tables directly? (Choose three)

A) All grant tables in memory are immediately updated on GRANT and REVOKE
B) Making changes directly to the grant tables, one must remember to execute flush privileges to make the changes take effect
C) Using GRANT and REVOKE allows the server to figure out the right tables and do all the appropriate work
D) GRANT and REVOKE statements allow you to do more fine-grained tuning of user privileges than does editing the grant tables directly.
E) None of the above

5. Which of the following best describes what the connection backlog is and why it may need to be increased? (Choose two)

A) It may need to be increased on a server with a high rate of transactions.
B) It may need to be increased on a server with a high rate of client connections.
C) The backlog is the queue of processes waiting to be processed on a server.
D) The backlog is the queue of network connections of clients waiting to connect.

Solutions: