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Question 1:

You have just executed a manual backup by using this command:

mysqlbackup –u root –p –-socket=/tmp/my.sock –-backup-dir=/my/backup/ backup

The operation completed without error.

What is the state of this backup and operation required before it is ready to be restored?

A. Backup State = Compressed Backup Operation = copy-back

B. Backup State = Raw Backup Operation = apply-log

C. Backup State = Prepared Backup Operation = validate

D. Backup State = Prepared Backup Operation = apply-log

E. Backup State = Raw Backup Operation = backupdir-to-image

Correct Answer: E

Question 2:

Which MySQL utility program should you use to process and sort the Slow Query Log based on query time or average query time?

A. mysqldumpslow

B. mysqldump

C. mysqlaccess

D. mysqlshow

E. mysqlslow

Correct Answer: A

Question 3:

Consider: Which statement best describes the meaning of the value for the key_len column?

A. It shows how many bytes will be used from each index row.

B. It shows the number of characters indexed in the key.

C. It shows the total size of the index row.

D. It shows how many columns in the index are examined.

Correct Answer: A

Question 4:

Examine the mydata table and SELECT statements:

You issue:

mysql> begin;

mysql> update mydata set a=0 where b=3;

How many rows are now protected by locks with the default InnoDB configuration?

A. one

B. one row and a next-key lock for supremum

C. one row and a gap-lock

D. five

Correct Answer: D

Question 5:

A particular government\’s security policy is to have very strict data encryption and safety settings. This is done by restricting access based on their own CA authority and limiting access to particular users within a department. Which method could be used to restrict access as required?

A. using GRANT … REQUIRE X509 AND REQUIRE ISSUER `/C=…..\’ AND REQUIRE SUBJECT `/C=…..\’

B. using GRANT USAGE, X509, …….ON *.* TO user@remotehost IDENTIFIED BY `secret_password\’

C. using GRANT … REQUIRE SSL for a secure connection

D. using GRANT USAGE, SSL, …..ON *.* TO user@remotehost IDENTIFIED BY `secret_password\’

Correct Answer: A

Question 6:

What does the possible_keys column in this output denote?

A. if it is possible for you to include any indexes in your query

B. whether there are any indexes on the tables that you are querying

C. if there are any indexes that may be used to solve this query

D. whether you are using any indexes in your query

Correct Answer: A

Question 7:

Is it true that binary backups always take less space than text backups?

A. Yes, because binary backups only contain data, and not statements required to insert data into the tables.

B. No, because text backups can have optimizations, which make them smaller, such as updating many rows at once.

C. No, because if InnoDB tables contain many empty pages, they could take more space than the INSERT statements.

D. Yes, because even if InnoDB tables contain many empty pages, text backups have empty INSERT statements for them.

Correct Answer: C

Question 8:

You are contacted by a user who does not have permission to access a database table. You determine after investigation that this user should be permitted to have access and so you execute a GRANT statement to enable the user to access the table.

Which statement describes the activation of that access for the user?

A. The access does not take effect until the user logs out and back in.

B. The access does not take effect until the next time the server is started.

C. The access is available immediately.

D. The access does not take effect until you issue the FLUSH PRIVILEGES statement.

Correct Answer: C

Question 9:

Which two methods accurately monitor the size of your total database size over time? (Choose two.)

A. monitoring the Innodb_rows_inserted status variable

B. monitoring the innodb_redo_log_size variable

C. monitoring the information_schema.TABLES table

D. monitoring datadir size in the operating system

E. monitoring cumulative Innodb_page_size increase

F. monitoring the performance_schema_hosts_size variable

Correct Answer: CF

Question 10:

Consider the index information for the dept_emp table in the employee\’s schema:

Which two conclusions can be made based on the output of the query? (Choose two.)

A. There are three indexes on the table.

B. There is a redundant index on the dept_no column.

C. The secondary indexes are optimized for unique key look-ups.

D. The values on the emp_no column must be unique.

E. The selectivity of the dept_no column is the best of the indexed columns.

F. There is a redundant index on the emp_no column.

Correct Answer: CF

Question 11:

Which two statements are true about InnoDB auto-increment locking? (Choose two.)

A. InnoDB never uses table_level locks.

B. InnoDB always protects auto-increment updates with a table-level lock

C. InnoDB does not use locks to enforce auto-increment uniqueness.

D. The auto-increment lock can be a table-level lock.

E. Some settings for innodb_autoinc_lock_mode can help reduce locking.

Correct Answer: DE

Question 12:

You want to create a temporary table named OLD_INVENTORY in the OLD_INVENTORY database on the master server. This table is not to be replicated to the slave server.

Which two changes would ensure that the temporary table does not propagate to the slave? (Choose two.)

A. Set binlog_format=MIXED with the –replicate-ignore-temp-table option.

B. Use the –replicate-do-db, –replicate-do-table, or –replicate-wild-do-table option with the value equal to OLD_INVENTORY.

C. Change the binlog_format option to ROW and restart mysqld before you create the OLD_INVENTORY table.

D. Stop SQL_THREAD on the slave until you have finished using the OLD_INVENTORY temporary table.

E. Use the –replicate-ignore-table option with the value equal to OLD_INVENTORY.OLD_INVENTORY and restart mysqld before creating the temporary table.

Correct Answer: BE

Question 13:

Which three allocate memory per thread in MySQL? (Choose three.)

A. query cache

B. thread cache

C. read buffer

D. internal temporary table

E. sort buffer

F. InnoDB buffer pool instance

Correct Answer: CEF

Reference: https://dev.mysql.com/doc/refman/5.6/en/memory-use.html

Question 14:

Suppose you are adding rows to a MyISAM table and the –datadir location runs out of disk space. What will happen when this occurs?

A. The server will crash.

B. The server suspends that INSERT operation until space becomes available.

C. An error message will be returned to the client .Server Error: ER_IO

D. The server suspends operations for all storage engines until space becomes available.

Correct Answer: B

Question 15:

You have installed MySQL Server for the first time on your system. However, the data directory along with the tables in the mysql system database are missing. Which step do you perform to create the contents of the data directory?

A. Run the create_system_tables.sql file

B. Run the mysql_unpack.sql file

C. Invoke mysqld with the –initialize option.

D. Invoke mysql with the –initialize option.

Correct Answer: C

Reference: https://dev.mysql.com/doc/refman/5.7/en/data-directory-initialization-mysqld.html