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Q51. Compare a typical Distributed Replicated Block Device (DRBD) with MySQL Standard Replication using master-slave replication. 

Which two statements are correct? 

A. Both technologies use the TCP/IP stack as their primary transmission medium. 

B. DRBD uses shared-disk technology. 

C. Both technologies guarantee an identical copy of data on the secondary node. 

D. Only MySQL can maintain a time-delayed copy of data on the secondary node. 

Answer:


Q52. Which hardware storage option, when set up with redundant disks, offers the least stability, availability, and reliability for Mysql data? 

A. RAID 5 

B. iSCSI 

C. SAN (Storage Area Network) 

D. NFS (Networked File System) 

Answer:


Q53. Consider the events_% tables in performance Schema. 

Which two methods will clear or reset the collected events in the tables? 

A. Using DELETE statements, for example, DELETE FROM performance_schema.events_watis_current; 

B. Using the statement RESET PERFORMANCE CACHE; 

C. Using the statement FLUSH PERFORMANCE CACHE; 

D. Using TRUNCATE statements, for example, TRUNATE TABLE performance_schema.events_waits_current; 

E. Disabling and re-enabling all instruments 

F. Restarting Mysql 

Answer: D,E 

Reference: http://dev.mysql.com/doc/refman/5.5/en/performance-schema-timing.html 


Q54. Which two events will cause a slave server to create a new relay log file? 

A. Starting of the I/O thread 

B. Execution of the FLUSH LOGS statement 

C. Starting of the SQL thread 

D. Reaching the slave_pendign _jobs_size_max limit 

E. Execution of FULSH TABLES WITH READ LOCK 

Answer: A,B 

Reference: http://dev.mysql.com/doc/refman/5.1/en/slave-logs-relaylog.html 


Q55. What are three actions performed by the mysql_secure_installation tool? 

A. It prompts you to set the root user account password. 

B. It checks whether file permissions are appropriate within datadir. 

C. It asks to remove the test database, which is generated at installation time. 

D. It can delete any anonymous accounts. 

E. It verifies that all users are configuration with the longer password hash. 

Answer: A,C,D 

Reference: http://prefetch.net/blog/index.php/2006/06/18/securing-mysql-installations-with-mysql_secure_installation/ 


Q56. Consider the following statement on a RANGE partitioned table: 

ALTER TABLE orders DROP PARTITION p1, p3; 

What is the outcome of executing the above statement? 

A. Only the first partition (p1) will be dropped as only one can be dropped at any time. 

B. All data in p1 and p3 partitions are removed, but the table definition remains unchanged. 

C. A syntax error will result as you cannot specify more than one partition in the same statement. 

D. All data in pi and p3 partitions are removed and the table definition is changed. 

Answer:

Reference: http://docs.oracle.com/cd/F49540_01/DOC/server.815/a67772/partiti.htm 


Q57. In a test database, you issue the SELECT … INTO OUTFILE statement to create a file with your t1 table data. 

You then TRUNCATE this table to empty it. 

Mysql> SELECT * INTO OUTFILE ‘/tmp/t1.sql’ from t1; 

mysql> TRUNCATE t1; 

Which two methods will restore data to the t1 table? 

A. Mysql> LOAD DATA INFILE ‘/tmp/t1.sql’ INTO TABLE t1; 

B. $ mysqladmin – u root – p – h localhost test – restore /tmp/t1.sql 

C. $ mysql – u root – p – h localhost test < /tmp/t1.sql 

D. $ mysqlinport – u root – p – h localhost test /tmp/t1.sql 

E. Mysql> INSERT INTO t1 VALUES FROM ‘/tmp/t1.sql’; 

Answer:


Q58. Which two statements are true about setting the per-thread buffers higher than required? 

A. More memory per thread is beneficial in all scenarios. 

B. It causes increased overhead due to initial memory allocation. 

C. It can affect system stability during peak load times, due to swapping. 

D. It requires increasing the thread_cache_size variable. 

Answer: C,D 


Q59. Which High Availability solution can provide a consistent, time-delayed (for example, one hour) snapshot of the live production database? 

A. MySQL Replication 

B. Distributed Replication Block Device 

C. Windows Server Failover Clustering 

D. MySQL Cluster 

Answer:


Q60. Following a server crash, the automatic recovery of InnoDB fails. 

How would you begin to manually repair the InnoDB tables? 

A. Start the server with the – innodb_force_recovery option set to a non-zero value. 

B. Start the server as usual, and then execute the REPAIR TABLE command. 

C. Start the server as usual, and then execute the CHECK TABLE command. 

D. Start the server with the – innodb_recover_options option set to FORCE. 

Answer: