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Which of the following statements is true when the database 

题目
单选题
Which of the following statements is true when the database is in ARCHIVELOG mode and tablespaces are in hot backup mode？（）
A

 Archive log generation is suspended until the tablespaces are taken out of hot backup mode. 

B

 Datafiles are not written to during hot backups.

C

 Changes to the database are cached during the backup and not written to the datafiles to ensure that the datafiles are consistent when recovered.

D

 The datafile headers are not updated during the backup.

E

 The way data is written to the online redo logs is unchanged during the backup.

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相似问题和答案

第1题：

You Execute the Following command to create a password file in the database server:$ orapwd file = ‘+DATA/PROD/orapwprod entries = 5 ignorecase = N format = 12’Which two statements are true about the password file?（）

A. It records the usernames and passwords of users when granted the DBA role.

B. It contains the usernames and passwords of users for whom auditing is enabled.

C. Is used by Oracle to authenticate users for remote database administration.

D. It records the usernames and passwords of all users when they are added to the OSDBA or OSOPER operating system groups.

E. It supports the SYSBACKUP, SYSDG, and SYSKM system privileges.


参考答案：C, E

第2题：

Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command：   RESTORE CONTROLFILE FROM AUTOBACKUP；   Which of the following statements is true？（） 

  • A、 The command restores only the missing control file.
  • B、 The command restores all the control files.
  • C、 The command fails because the database is running.
  • D、 This is the correct way to address this problem.
  • E、 This is not the correct way to address this problem.

正确答案:C,E

第3题：

Which two statements are true regarding the starting of the database instance using the following command?()SQL>STARTUP UPGRADE

A. It enables all system triggers.

B. It allows only SYSDBA connections.

C. It ensures that all job queues remain active during the upgrade process.

D. It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.


参考答案：B, D

第4题：

Which two statements are true about the Automatic Diagnostic Repository （ADR）？（） 

  • A、 The ADR base keeps all diagnostic information in binary format
  • B、 SQL*Plus provides the ADRI script， which can be used to work with ADR
  • C、 The ADR can be used for problem diagnosis only when the database is open
  • D、 The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null
  • E、 The ADR can be used for problem diagnosis even when the database instance is down
  • F、 The ADR base is shared across multiple instances

正确答案:E,F

第5题：

which one of the following database elements is not updated when the design task is run?（）

  • A、forms
  • B、views
  • C、roles
  • D、agents

正确答案:C

第6题：

When WebSphere Commerce， WebSphere Application Server， the web server and the database server are all located on a single machine， which of the following statements are TRUE？ （）

  • A、this is a multi-node installation
  • B、this is a single node installation.
  • C、each hardware and software component is a single point of failure.
  • D、this is an example of load balancing.

正确答案:B,C

第7题：

Which two statements are true regarding the starting of the database instance using the following command?（） SQL>STARTUP UPGRADE

  • A、It enables all system triggers.
  • B、It allows only SYSDBA connections.
  • C、It ensures that all job queues remain active during the upgrade process.
  • D、It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.

正确答案:B,D

第8题：

Which two statements are true about the Automatic Diagnostic Repository (ADR)?() (Choose two.)

A. The ADR base keeps all diagnostic information in binary format

B. SQL*Plus provides the ADRI script, which can be used to work with ADR

C. The ADR can be used for problem diagnosis only when the database is open

D. The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null

E. The ADR can be used for problem diagnosis even when the database instance is down

F. The ADR base is shared across multiple instances


参考答案：E, F

第9题：

Which of the following statements are true？（） 

  • A、 The equals（） method determines if reference values refer to the same object.
  • B、 The == operator determines if the contents and type of two separate objects match.
  • C、 The equals（） method returns true only when the contents of two objects match.
  • D、 The class File overrides equals（） to return true if the contents and type of two separate objects        match.

正确答案:A,D

第10题：

You plan to execute the following command to perform a Flashback Database operation in your database：   SQL> FLASHBACK DATABASE TO TIMESTAMP （SYSDATE -5/24）；   Which two statements are true about this？（）

  • A、 The database must have multiplexed redo log files
  • B、 The database must be in the MOUNT state to execute the command
  • C、 The database must be in the NOMOUNT state to execute the command
  • D、 The database must be opened in RESTRICTED mode before this operation
  • E、 The database must be opened with the RESETLOGS option after the flashback operation

正确答案:B,E

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