Oracle 1Z0-883 ExamMySQL 5.6 Database Administrator

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Ucertify offers free demo for 1Z0-883 exam. "MySQL 5.6 Database Administrator", also known as 1Z0-883 exam, is a Oracle Certification. This set of posts, Passing the Oracle 1Z0-883 exam, will help you answer those questions. The 1Z0-883 Questions & Answers covers all the knowledge points of the real exam. 100% real Oracle 1Z0-883 exams and revised by experts!

Q51. You want to shutdown a running Mysql Server cleanly. 

Which three commands that are valid on either Windows or Linux will achieve this? 

A. Shell> pkill –u mysql mysqld_safe 

B. Shell> service mysql safe_exit 

C. Shell> /etc/init.d/mysql stop 

D. Shell> mysqladmin –u root –p shutdown 

E. Mysql> STOP PROCESS mysqld; 

F. Shell> net stop mysql 

G. Shell> nmc mysql shutdown 

Answer: C,D,E 


Q52. Which two options describe how MySQL Server allocates memory? 

A. Each thread allocates memory from a global pool. 

B. Global memory resources are allocated at server startup. 

C. Thread memory is pre-allocated up to thread_cache_size for performance. 

D. Each connection may have its own per-thread memory allocations. 

Answer: B,D 


Q53. You have enabled the Slow Query Log for a short period. 

When you process the Slow Query Log, you receive the following snip of output: 

Count: 100 Time=0 .22a (22s) Lock=0.00s (0s) Rows=0.0 (0), root[root] @localhost 

CREATE TABLE ‘t1’ (id serial,id0 varchar(N) unique key,intcaoll INT (N) 

,intco12 INT(N) ,intco13 INT(N) ,intco14 INT(N) ,intco15 INT(N) 

,charcol1 VARVHAR(N) ,charcol2 VARCHAR(N) charcol3 VARCHAR (N) 

,charcol4 VARVHAR(N) ,charcol5 VARCHAR(N) charcol6 VARCHAR (N) 

,charcol7 VARVHAR(N) ,charcol8 VARCHAR(N) charcol9 VARCHAR (N) .charcol 10 

VACHAR (N) ) 

Count: 64000 Time-0.02s (1213s) Lock=0.00s (6s) Rows=1.0 (64000), root [root]@ 

localhost 

SELECT intocl1, intco12, intco13, intco14, intco15, intco16,intco17, intco18 

,intcol9, intcol10, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6 

,charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = ‘s’ 

Count: 1 Time=0.02s (0s) Lock=0.00s (0s) Rows=1.0 (1) agent [agent] @localhost 

SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, 

Process_priv FROM mysql.user WHERE CONCAT (user, ‘s’, host) = CURRENT_USER () 

Count: 48000 Time=0.02s (778s) Lock=0.00 (3s) Rows=1.0 (48000), root[root]@localhost 

SELECT intocl1,intcol2,intcol3, intcol4, intcol5, charcol1, charcol2, charcol3 

,charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id 

= ‘s’ 

You want to tune the query such that it provides the greatest overall time savings. 

Which query will accomplish this? 

A. CHEATE TABLE ‘t1’ (id serial, id0 varchar (N) unique key, intcol1 INT (N) ,intcol2 INT (N), intcol3 INT(N) ,intcol4 INT(N), intcol5 INT(N), charool1 VARCHAR 

(N) 

,charcol2 VARCHAR (N), charcol3 VARCHAR(N), charcol4 VARCHAR(N), charcol5 

VARCHAR (N) 

,charcol6 VARCHAR (N), charcol7 VARCHAR(N), charcol8 VARCHAR(N), charcol9 

VARCHAR (N) 

,charcol10 VARCHAR (N); 

B. SELECT intcol1, intcol2, intcol3, intcol4, intcol5, intcol6, intcol7, intcol8, intcol9, 

Intcol10, intcol11, intcol12, intcol13, intcol14, intcol15, intcol16, intcol17, intcol18, intcol19, 

charcol10 

FROM t1 

WHERE id = ‘s’; 

C. SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv 

FROM mysql.user 

WHERE CONCAT (user,’s’, host) = CURRENT_USER(); 

D. SELECT intcol1, intcol2, intcol3, intcol4, intcol5, charcol1, charcol2, charcol3, charcol4, 

charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 

FROM t1 

WHERE id = ‘s’; 

Answer:


Q54. Assume that you want to know which Mysql Server options were set to custom values. Which two methods would you use to find out? 

A. Check the configuration files in the order in which they are read by the Mysql Server and compare them with default values. 

B. Check the command-line options provided for the Mysql Server and compare them with default values. 

C. Check the output of SHOW GLOBAL VARIABLES and compare it with default values. 

D. Query the INFORMATION_SCHEMA.GLOBAL_VARIABLES table and compare the result with default values. 

Answer:


Q55. When backing up a replication slave, which three should also be backed up in addition to data? 

A. The master.info and relay.info files 

B. The relay log files 

C. The relay index file 

D. Mysql.slave_master_info table 

E. Mysql.slave_relay_log_info table 

F. Mysql.slave_worker_info table 

Answer: A,B,E 

Reference: http://dev.mysql.com/doc/refman/5.0/en/replication-solutions-backups-rawdata.html 


Q56. ROW-based replication has stopped working. You investigate the error log file and find the following entries: 

2013-08-27 14:15:47 9056 [ERROR] Slave SQL: Could not execute Delete_rows event on table test.t1; Can’t find record in ‘t1’, Error_code: 1032; handler error 

HA_ERR_KEY_NOT_FOUND; the event’s master log 56_master-bin. 000003, end_log_pos 851, Error_code: 1032 

2013-08-27 14:15:47 9056 [warning] Slave: Can’t find record in ‘t1’ Error_code: 1032 

2013-08-27 14:15:47 9056 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with “SLAVE START”. We stopped at log ‘56_master-bin. 000003’ position 684 

Why did you receive this error? 

A. The slave SQL thread does not have DELETE privileges to execute on test.t1 table.s 

B. The table definition on the slave -litters from the master. 

C. Multi-threaded replication slaves can have temporary errors occurring for cross database updates. 

D. The slave SQL thread attempted to remove a row from the test.t1 table, but the row did not exist. 

Answer:


Q57. You are creating a new server with the same accounts as an existing server. You do this by 

importing a mysqldump file of the mysql database. 

You test whether the import was successful by using the following commands: 

Mysql> select user, host, password from mysql.user; 

9 rows in set (0.00 sec) 

Mysql> show grants for ‘admin’@’%’; 

ERROR 1141 (42000): There is no such grant defined for user ‘admin’ on host ‘%’ 

Which command will fix this issue? 

A. CREATE USER ‘admin’ @’%’; 

B. GRANT USAGE ON *.* TO ‘admin’@’%’; 

C. FLUSH PRIVILEGES; 

D. FLUSH HOST CACHE; 

E. UPDATE mysql.user SET Create_user_priv = ‘Y’ WHERE user= ‘admin’; 

Answer:

Reference: http://lists.mysql.com/mysql/218268 


Q58. Consider the query: 

Mysql> SET @run = 15; 

Mysql> EXPLAIN SELECT objective, stage, COUNT (stage) 

FROM iteminformation 

WHERE run=@run AND objective=’7.1’ 

GROUP BY objective,stage 

ORDER BY stage; 

The iteminformation table has the following indexes; Mysql> SHOW INDEXES FROM iteminformation: 

This query is run several times in an application with different values in the WHERE clause in a growing data set. 

What is the primary improvement that can be made for this scenario? 

A. Execute the run_2 index because it has caused a conflict in the choice of key for this query. 

B. Drop the run_2 index because it has caused a conflict in the choice of key for this query. 

C. Do not pass a user variable in the WHERE clause because it limits the ability of the optimizer to use indexes. 

D. Add an index on the objective column so that is can be used in both the WHERE and GROUP BY operations. 

E. Add a composite index on (run,objective,stage) to allow the query to fully utilize an index. 

Answer:


Q59. Which three statements describe how the strict SQL mode provides added security? 

A. It rejects statements that try to insert out-of-range values 

B. It rejects invalid dates. 

C. It limits the operations that the server can perform. 

D. It rejects queries that produce out-of-range values. 

E. It rejects dates with zero day or month values. 

Answer: C,D,E 


Q60. The following commands are available in the Linux binary distributions of Mysql: 

Mysqld Mysqld_safe Mysql.server 

What is the correct description of each of these commands? 

A. Mysqld is the server. 

Mysqld_safe is a shell script that invokes mysqld. 

Mysql.server is a wrapper for mysql_safe. 

B. Mysqld is a shell script that starts mysql.server. 

Mysqld_safe causes the server to start up in data recovery mode. 

Mysql.server is the server. 

C. Mysqld is the server. 

Mysqld_safe causes the server to start up in data recovery mode. 

Mysql.server is a wrapper for mysqld_safe. 

D. Mysql, mysqld.safe, and mysql.server reside in different locations but are all symlinked 

to the same script. 

Answer:


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