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

1. What are some general principles of making a good MySQL backup?

A) Enable the binary log.
B) Enable the backup log.
C) Store your data directory and backup files on separate physical drives or locations.
D) Never flush the logs.
E) Make backups regularly.
F) Flush the logs after backup.

2. Which of the following are true regarding the table cache?

A) Each connection has its own table cache. They are of equal size, set globally.
B) Increasing the size of the variable table_cache allows mysqld to keep more tables open simultaneously.
C) The size of the table cache may be set per-session
D) It is used to cache row data in open tables.
E) It holds file descriptors for open tables.
F) There is one table cache, shared among all sessions.

3. Which of the following correctly defines the general difference between a read lock and a write lock?

A) A read lock allows other clients to read the same data, however will prevent any modification of the data until the lock is released.
B) A write lock prevents any other client from reading or writing the locked data until the lock is released.
C) A write lock only prevents any other client from modifying the locked data until the lock is released.
D) A read lock prevents any other client from reading the same data, until the lock is released.

4. When working with InnoDB, for which of the following reasons should you use the FOR UPDATE locking modifier?

A) You intend to run more than ten UPDATE statements in one transaction.
B) You intend to execute an UPDATE statement on any row.
C) You intend to SELECT a set of rows, then modify those rows.

5. Which of the following are requirements for InnoDB binary portability?

A) Database and table names must use lowercase format.
B) Both machines must use the same operating system.
C) Both machines must use two's-complement integer arithmetic.
D) Both machines must use IEEE floating-point format or contain no floating-point columns.

Solutions: