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MYSQL 1Z0-874 Exam Syllabus Topics:

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

1. Consider the following EXPLAIN output. mysql> EXPLAIN SELECT Name FROM City WHERE Population > 8000000 *************************** 1. row *************************** id: 1 select_type: SIMPLE table: City type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 4079 Extra: Using where
Which of the following statements are true? (Choose three)

A) All 4079 rows of the table need to examined.
B) The query cannot be optimized any better.
C) No index could be used to perform the query.
D) The Name column should be indexed.
E) The Population column should be indexed.

2. Suppose the key column of an EXPLAIN output is NULL. What does this mean?

A) There are no indexes available for use in the query.
B) There are no indexes on the table you are querying.
C) There are no indexes considered useful for processing that query.

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

4. Connection strings in FEDERATED tables are stored...

A) In variables.
B) In a .fed file corresponding to the table.
C) They are not stored, but must be re-specified at server restart.
D) Within the table definition.

5. Which of the following statements are true regarding the slow query log? (Choose four)

A) The slow query log will contain queries that take more than 10 seconds.
B) To have the slow query log contain queries that don't utilize any index, the log-queriesnotusingindexes option needs to be set.
C) You can use the SHOW SLOW QUERIES statement to display all entries in the slow queries log.
D) The slow query log contains queries that don't utilize any index.
E) The slow query log is always enabled.
F) The slow query log will contain queries that take more seconds than configured in the long_query_time option.
G) You can use the mysqldumpslow command line tool to summarize the content of the slow query log.
H) The slow query log can be switched on with the log_slow_queries option.

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