问题：单选题You have taken a Logical Volume Manager (LVM) snapshot backup of a volume that contains the MySQL data directory. Why is it important to remove snapshots after completing a RAW backup in this way?（）A The snapshot size will continue to grow as changes to the volume are madeB The snapshots take a significant amount of disk space as they are a duplicate copy of the dataC The system can only support one snapshot per volume, and you need to remove it to be able to take your next backupD The system keeps a copy of changes in memory and can cause an out of memory event
查看答案
问题：多选题What are three facts about backups with mysqldump?（）ACan back up a remote database serverBAllow a consistent backup to be takenCAre always faster to restore than binary backupsDAre able to back up specific items within a databaseECreate automatically compressed backupsFWill lock all storage engines for duration of backup
问题：多选题Which two statements are true regarding partitioning in Mysql?（）ATables with BLOB and TEXT columns cannot be partitionedBPartitioning allows easier management of smaller data sets for certain queriesCPartitioning allows different columns to be stored in separate filesDThe partitioning expression is an integer or function that returns an integer value or NULL valueEPartitioning is only available for those storage engines that implements it natively
问题：多选题Which three tasks can be performed by using the performance Schema?（）AFinding queries that are not using indexesBFinding rows that are locked by InnoDBCFinding client connection attributesDFinding the part of a code in which a single query is spending timeEFinding the size of each table
问题：单选题Review the definition of the phone_list view. CHEATE OR REPLACE ALGORITHM=MERGE DEFINER= 'root'@localhost' SQL SECURITY DEFINER VIEW 'phone_list' AS SELECT e . id as id 'e . first_name AS 'first_name' 'e . last_name AS 'last_name' 'coalesce ( ph1.phone_no, ' – ') AS 'office_no' 'coalesce (ph2 .phone_no, ' – ') AS 'cell_no' FROM employees e LEFT JOIN employee_phone ph1 ON ph1.emp_id = e.id AND ph1.type = 'office' LEFT JOIN employee_phone ph2 ON ph2 .emp_id = e.id AND ph2 .type = 'mobile' The tables employees and employee_phone are InnoDB tables; all columns are used in this view. The contents of the phone_list view are as follows: Mysql> select * from phone_list; 1 row in set (0.00 sec) Which method can you use to change the cell_no value to '555-8888' for John Doe?（）A INSERT INTO employee_phone (emp_id, phone_no, type) VALUES (1, '555-8888','mobile')B UPDATE phone_list SET cell_name '555-8888' WHERE first_name= 'John' and last_name= 'Doe'C DELETE FROM phone_list WHERE first_name= 'John' and last_name= 'Doe'; INSERT INTO phone_list (first_name, last_name, office_no, cell_no) VALUES ('John' , 'Doe' , 'x1234' , '555-8888)D UPDATE employee_phone SET phone_no= '555-8888' where emp_id=1
问题：单选题Consider the following: Which statement best describes the meaning of the value for the key_len column?（）AIt shows the total size of the index rowBIt shows how many columns in the index are examinedCIt shows the number of characters indexed in the keyDIt shows how many bytes will be used from each index row
问题：单选题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 configurationB When using mysql_config_editor for configuration adjustments, it detects incorrect syntax and typing mistakesC The mysqld_safe script skips the unknown variable and starts using the remaining configuration changesD Mysqld prints to the error log about an unknown variable, and then exits
问题：多选题Mysqldump was used to create a single schema backup; Shell> mysqldump –u root –p sakila > sakila2013.sql Which two commands will restore the sakila database without interfering with other running database?（）AMysql＞ USE sakila; LOAD DATA INFILE 'sakila2013.sql';BShell＞ mysql –u root –p sakila sakila2013.sqlCShell＞ mysql import –u root –p sakila sakila2013.sqlDShell＞ mysql –u root -p –e 'use sakila; source sakila2013.sql'EShell＞ mysql –u root –p –silent ＜ sakila2013.sql
问题：单选题You have forgotten the root user account password. You decide to reset the password and execute the following: Shell＞ /etc/init.d/mysql stop Shell＞ /etc/init.d/mysql start – skip-grant tables Which additional argument makes this operation safer?（）A –skip-networking, to prohibit access from remote locationsB –reset-grant-tables, to start the server with only the mysql database accessibleC –read-only,to set all data to read-only except for super usersD –old-passwords, to start Mysql to use the old password format while running without the grant tables
问题：单选题While reviewing the MySQL error log, you see occasions where MySQL has exceeded the number of file handles allowed to it by the operating system. Which method will reduce the number of file handles in use?（）A Activating the MySQL Enterprise thread pool pluginB Relocating your data and log files to separate storage devicesC Disconnecting idle localhost client sessionsD Implementing storage engine data compression options
问题：多选题When backing up a replication slave, which three should also be backed up in addition to data?（）AThe master.info and relay.info filesBThe relay log filesCThe relay index fileDMysql.slave_master_info tableEMysql.slave_relay_log_info tableFMysql.slave_worker_info table
问题：多选题In a design situation, there are multiple character sets that can properly encode your data. Which three should influence your choice of character set?（）ASyntax when writing queries involving JOINSBMemory usage when working with the data CCharacter set mapping index hash sizeDDisk usage when storing data
问题：多选题Which two requirements would lead towards a high availability solution?（）AWhen uptime is criticalBWhen data must be refactoredCWhen application concurrency is staticDWhen data loss is unacceptableEWhen application is a single point of failure
问题：单选题Which statement is true about FLUSH LOGS command?（）A It requires the RELOAD, FILE, and DROP privilegesB It closes and reopens all log filesC It closes and sends binary log files to slave serversD It flushes dirty pages in the buffer pool to the REDO logs
问题：单选题You are using CTIDS in replication. You need to skip a transaction with the CTID of aaa-bbb-cccddd-eee : 3 on a slave. Which command would you execute from a Mysql prompt?（）A STOP SLAVE; SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; START SLAVEB STOP SLAVE; BEGIN; SET GTID_IGNORE=aaa-bbb-ccc-ddd-eee: 3; COMMIT; START SLAVEC STOP SLAVE; SETGTID_NEXT=aaa-bbb-ccc-ddd-eee: 3; BEGIN; COMMIT; SET GTID_NEXT=AUTOMATIC; START SLAVED STOP SLAVE; RESET SLAVE; BEGIN; SKIP NEXT GTID; COMMIT; START SLAVE
问题：单选题You use—login-path to access a MySQL server on a Linux installation. Which statement is true about the – login-path option that is created by using mysql_config_editor?（）A All system users have access to the MySQL server via—login path localB login-path can be used only for MySQL servers running on a local machineC login-path allows you to provide login credentials without passing clear text passwords on the command lineD When using – login-path to connect to a remote MySQL server, the remote server version must be 5.6 or later
问题：单选题You want to start monitoring statistics on the distribution of storage engines that are being used and the average sizes of tables in the various databases. Some details are as follows: The Mysql instance has 400 databases. Each database on an average consists of 25-50 tables. You use the query: SELECT TABLE_SCHEMA, 'ENGINE', COUNT (*), SUM(data_length) total_size FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE= 'BASE TABLE' GROUP BY TABLE_SCHEMA, 'ENGINE' ; Why is this query slow to execute?（）A Collecting information requires large numbers of locks on various INFORMATION_SCHEMA tablesB Aggregating details from various storage engine caches for the final output is time consumingC Collecting information requires various disk-level operations and is time consumingD Counting and summarizing all table pages in the InnoDB shared tablespace is time consuming
问题：单选题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?（）AABBCCDD
问题：多选题Which three data components are needed for point-in-time recovery?（）AThe error logBThe backup logCThe general query logDBinary logsEThe data backupFConfiguration files
