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MYSQL 1Z0-874 Exam Syllabus Topics:

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

1. With replication, what on the master is used to send commands to the slave?

A) The relay log.
B) The SQL Thread.
C) The binary log.

2. Which of the following best describes the purpose of the InnoDB buffer pool?

A) It caches data and index information for InnoDB tables.
B) It is the amount of buffers available during a transaction.
C) It holds changes made during a transaction before they are written to the log.

3. Which of the following statements about MEMORY tables are true? (Choose two)

A) MEMORY tables should not be used to store large amounts of data.
B) The number of MEMORY tables on a server will not cause any performance problems.
C) It is OK to store large amounts of data in MEMORY tables.
D) Creating many MEMORY tables should be avoided.

4. In which ways can you set the query_cache_type option? (Choose three)

A) You can set it in the configuration file and restart the server.
B) You can set it at runtime for the entire server with the following statement: SET GLOBAL query_cache_type=[0|1|2]
C) You can set it at runtime for the current connection with the following statement: SET SESSION query_cache_type=[0|1|2]

5. Consider the following:
mysql> DESC customers;
+--------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------+------------------+------+-----+---------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| name_1 | char(20) | YES | MUL | NULL | |
| name_2 | varchar(20) | YES | | NULL | |
| name_3 | varchar(20) | YES | | NULL | |
| email | varchar(50) | YES | | NULL | |
+--------+------------------+------+-----+---------+----------------+
mysql> EXPLAIN SELECT * FROM customers WHERE name_1 = 'Johnny'
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: customers
type: ref
possible_keys: i_name_1_01,i_name_1_02
key: i_name_1_01
key_len: 21
ref: const
rows: 1
Extra: Using where
What can be assumed by looking at the key_len column?

A) The partial index is being used.
B) The full index is being used.
C) The longest index is 21 characters long.
D) No indexes are being used.

Solutions: