Cause all that matters here is passing the Oracle 1Z0-883 exam. Cause all that you need is a high score of 1Z0-883 MySQL 5.6 Database Administrator exam. The only one thing you need to do is downloading Testking 1Z0-883 exam study guides now. We will not let you down with our money-back guarantee.
♥♥ 2021 NEW RECOMMEND ♥♥
Free VCE & PDF File for Oracle 1Z0-883 Real Exam (Full Version!)
★ Pass on Your First TRY ★ 100% Money Back Guarantee ★ Realistic Practice Exam Questions
Free Instant Download NEW 1Z0-883 Exam Dumps (PDF & VCE):
Available on:
http://www.surepassexam.com/1Z0-883-exam-dumps.html
Q31. Which statement is true about the log-output variable?
A. It is a static variable and can be set only at MySQL server startup.
B. It enables and starts the General Query Log.
C. It sets the target location for the binary logs generated by the MySQL sever.
D. It specifies output destinations for the slow and General Query logs.
Answer: D
Q32. 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: B
Q33. 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: A
Q34. What are three facts about backups with mysqldump?
A. Can back up a remote database server
B. Allow a consistent backup to be taken
C. Are always faster to restore than binary backups
D. Are able to back up specific items within a database
E. Create automatically compressed backups
F. Will lock all storage engines for duration of backup
Answer: D,E,F
Q35. 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: A
Q36. Consider the three binary log files bin.00010, bin.00011, and bin.00012 from which you want to restore data.
Which method would use mysqlbinlog for greater consistency?
A. shell> mysqlbinlog bin.00010 | mysql shell> mysqlbinlog bin.00011 | mysql shell> mysqlbinlog bin.00012 | mysql
B. shell> mysqlbinlog bin.00010 bin.00011 bin.00012 | mysql
C. shell> mysqlbinlog – restore bin.00010 bin.00011 bin.00012
D. shell> mysqlbinlog – include-gtide=ALL bin.00010 bin.00011 bin.00012 | mysql
Answer: A
Q37. You adjust a default configuration to the following /etc/my.cnf on a Linux installation:
[mysqld]
Loq-bin
Binrylog_format=ROW
You do not notice the spelling error in binrylog_format and restart your production server.
How does the MySQL server behave with incorrectly spelled options?
A. Mysqld uses internal configuration versioning and reverts to the previous configuration.
B. When using mysql_config_editor for configuration adjustments, it detects incorrect syntax and typing mistakes.
C. The mysqld_safe script skips the unknown variable and starts using the remaining configuration changes.
D. Mysqld prints to the error log about an unknown variable, and then exits.
Answer: D
Q38. Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new
application, which heavily reads and writes data.
This requires the following config file options:
Sync_binlog=1
Innodb_flush_log_at_trx_commit=1
Innodb_doublewrite=1
However, this configuration is expected to introduce disk I/O overhead.
What three changes will reduce disk I/O overheads?
A. Use of soft links for database directories on the same physical disk
B. Use of separate directories on the same physical disk for log files and data files
C. Placement of InnoDB log files and datadir on separate physical disks
D. Allocation of RAM to the buffer pool such that more of the data can fit in RAM
E. Use of delay_key_write=ON for batch index update
Answer: D,E
Q39. What is true regarding InnoDB locking?
A. InnoDB row locks may be escalated to page or table-level locks.
B. InnoDB only uses row locks, not page or table-level locks,
C. InnoDB uses row and table-level locks, but row locks are not escalates,
D. InnoDB locks only those rows that are updated.
E. InnoDB uses row-level or table-level locks depending on the number of rows affected.
Answer: E
Reference: http://dev.mysql.com/doc/refman/5.0/en/table-locking.html
Q40. A Mysql Server has been running an existing application successfully for six months.
The my.cnf is adjusted to contain the following additional configuration:
[mysqld]
Default-authentication-plugin=sha256_password
The Mysql Server is restarted without error.
What effect will the new configuration have in existing accounts?
A. They will have their passwords updated on start-up to sha256_password format.
B. They will have to change their password the next time they login to the server.
C. They are not affected by this configuration change.
D. They all connect via the secure sha256_password algorithm without any configuration change.
Answer: D
Reference: http://dev.mysql.com/doc/refman/5.6/en/sha256-authentication-plugin.html
