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多选题
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 delay_key_write=ON for batch index update
C
Allocation of RAM to the buffer pool such that more of the data can fit in RAM
D
Placement of InnoDB log files and datadir on separate physical disks
E
Use of separate directories on the same physical disk for log files and data files
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更多 “多选题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?（）AUse of soft links for database directories on the same physical diskBUse of delay_key_write=ON for batch index updateCAllocation of RAM to the buffer pool such that more of the data can fit in RAMDPlacement of InnoDB log files and datadir on separate physical disksEUse of separate directories on the same physical disk for log files and data files” 相关考题
考题
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 diskB.Use of delay_key_write=ON for batch index updateC.Allocation of RAM to the buffer pool such that more of the data can fit in RAMD.Placement of InnoDB log files and datadir on separate physical disksE.Use of separate directories on the same physical disk for log files and data files
考题
the change from sentence to discourse is the change from learning language _________ to __________.
A、In isolation; in contextsB、In dependence; in discourseC、In isolation; in discourseD、In dependence; in contexts
考题
事务的ACID性质中，关于原子性(atomicity)的描述正确的是(1)。A．指数据库的内容不出现矛盾的状态。B．若事务正常结束，即使发生故障，更新结果也不会从数据库中消失。C．事务中的所有操作要么都执行，要么都不执行。D．若多个事务同时进行，与顺序实现的处理结果是一致的。
考题
在数据库加锁技术中，一个事务如果对某一数据项加了排它(exclusive)锁，它将保持此锁直到该事务结束。这是保证事务______特性。A．原子性(atomicity)B．一致性或可串行性(consistency or serializability)C．永久性(durability)D．隔离性(isolaty)
考题
事务管理的特性叙述不正确的是 A.事务管理特性包括：（1）原子性、（2）一致性（Consistency）（3）隔离性（Isolation）、（4）持续性（永久性）（Durability）
B.原子性（Atomicity）是指数据库的逻辑工作单位。
C.隔离性（Isolation）是指可以被其他事务干扰。
D.持续性（永久性）（Durability）是指一旦提交，改变就是永久性的
考题
A transaction is an action,or a series of actions,carried out by a single user or（ ）,that accesses or changes the contents of the database.A transaction should possess the four basic or so-called ACID properties:Atomicity.The“all or nothing”property.A transaction is an（ ）unit that is either performed in its entirety or is not performed at all.Consistency.A transaction must transform the database from one consistent state to another consistent state.Isolation.Transactions execute independently of one another.In other words,the partial effects of（ ）transactions should not be visible to other transactions.Durability.The effects of a successfully completed（committed）transaction are permanently recorded in the database and must not be lost because of a subsequent failure.The four properties above,only（请作答此空）property is the responsibility of the concurrency control subsystem to ensure.It is the responsibility of both the（ ）and the application developers to ensure consistency.To guarantee the Atomicity and Durability properties after a failure,a log file is needed.A.atomicity
B.consistency
C.isolation
D.durability
考题
A transaction is an action,or a series of actions,carried out by a single user or（ ）,that accesses or changes the contents of the database.A transaction should possess the four basic or so-called ACID properties:Atomicity.The“all or nothing”property.A transaction is an（ ）unit that is either performed in its entirety or is not performed at all.Consistency.A transaction must transform the database from one consistent state to another consistent state.Isolation.Transactions execute independently of one another.In other words,the partial effects of（请作答此空）transactions should not be visible to other transactions.Durability.The effects of a successfully completed（committed）transaction are permanently recorded in the database and must not be lost because of a subsequent failure.The four properties above,only（ ）property is the responsibility of the concurrency control subsystem to ensure.It is the responsibility of both the（ ）and the application developers to ensure consistency.To guarantee the Atomicity and Durability properties after a failure,a log file is needed.A.completed
B.incomplete
C.aborted
D.committed
考题
A transaction is an action,or a series of actions,carried out by a single user or（请作答此空）,that accesses or changes the contents of the database.A transaction should possess the four basic or so-called ACID properties:Atomicity.The“all or nothing”property.A transaction is an（ ）unit that is either performed in its entirety or is not performed at all.Consistency.A transaction must transform the database from one consistent state to another consistent state.Isolation.Transactions execute independently of one another.In other words,the partial effects of（ ）transactions should not be visible to other transactions.Durability.The effects of a successfully completed（committed）transaction are permanently recorded in the database and must not be lost because of a subsequent failure.The four properties above,only（ ）property is the responsibility of the concurrency control subsystem to ensure.It is the responsibility of both the（ ）and the application developers to ensure consistency.To guarantee the Atomicity and Durability properties after a failure,a log file is needed.A.application developer
B.all users
C.application program
D.DBMS
考题
在数据库加锁技术中，一个事务如果对某一数据项加了排他(exclusive)锁，它将保持此锁直到该事务结束。这是保证事务哪种特性的重要措施()。A.原子性(atomicity)
B.一致性或可串行性
C.永久性(durability)
D.隔离性(isolaty)
考题
事务的ACID性质中，关于原子性（Atomicity）的描述正确的是（）。A、指数据库的内容不出现矛盾的状态B、若事务正常结束，即使发生故障，更新结果也不会从数据库中消失C、事务中的所有操作要么都执行，要么都不执行D、若多个事务同时进行，与顺序实现的处理结果是一致的
考题
事务的特性有（）A、原子性（Atomicity）B、一致性（ConsistemL）C、隔离性（Isolation）D、可生存性（Survivability）E、持续性（Durability）
考题
Efficient fire-fighting drill demands the full （）of persons in all departments of the ship.A、operateB、operationC、co-operateD、co-operation
考题
CNA正确的工作流程是（）A、create a planned area→adjust→change data→update→consistency checkB、adjust→create a planned area→change data→consistency check→updateC、consistency check→adjust→create a planned area→change data→update
考题
事务的特性有（）。A、原子性（Atomicity）B、一致性（Consistency）C、隔离性（1solation）D、可生存性（Survivability）E、持续性（Durability）
考题
单选题When fighting a spreading fire resulting from a broken fuel line, you should FIRST （）.A
look for a CO2 extinguisherB
use a soda acid extinguisherC
shut off the fuel supplyD
smother the fire with rags
考题
多选题事务的特性有（）A原子性（Atomicity）B一致性（ConsistemL）C隔离性（Isolation）D可生存性（Survivability）E持续性（Durability）
考题
单选题A fifteen-pound CO2 extinguisher（）.A
contains 15 pounds of CO2B
weighs 15 pounds when full of CO2C
has 15 pounds of pressure at the nozzleD
weighs 15 pounds when empty
考题
单选题The electrolyte in a lead-acid storage battery consists of distilled water and （）.A
hydrogen chlorideB
calcium chlorideC
sulfuric acidD
muriatic acid
考题
单选题事务的ACID性质中，关于原子性（Atomicity）的描述正确的是（）。A
指数据库的内容不出现矛盾的状态B
若事务正常结束，即使发生故障，更新结果也不会从数据库中消失C
事务中的所有操作要么都执行，要么都不执行D
若多个事务同时进行，与顺序实现的处理结果是一致的
考题
多选题事务的特性有（）。A原子性（Atomicity）B一致性（Consistency）C隔离性（1solation）D可生存性（Survivability）E持续性（Durability）
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