Tag: technology

Questions Related to technology

The data file belonging to theSYSTEMtablespaceis corrupted and no backup of the file is available. How do you recover the data file?

technology databases

  1. The data file cannot be recovered.

  2. The date file can be restored from the SYSTEM auto backup.

  3. Take thetablespaceoffline,drop,kand re-create it.

  4. Recovery Manager (RMAN) is used to recover the data file.

  5. The ALTER DATABSE CREATE DATAFILE

Show answer
Correct Option: A

AI Explanation

To answer this question, you need to understand the concept of data file recovery in a database management system.

Option A) The data file cannot be recovered - This option is correct. If the data file belonging to the SYSTEM tablespace is corrupted and no backup of the file is available, then it cannot be recovered.

Option B) The data file can be restored from the SYSTEM auto backup - This option is incorrect. If there is no backup of the data file available, it cannot be restored from an auto backup.

Option C) Take the tablespace offline, drop, and re-create it - This option is incorrect. Taking the tablespace offline, dropping it, and re-creating it will not recover the corrupted data file.

Option D) Recovery Manager (RMAN) is used to recover the data file - This option is incorrect. Recovery Manager (RMAN) is a tool used for backup and recovery operations, but it requires a backup of the data file to recover it.

Option E) The ALTER DATABASE CREATE DATAFILE - This option is incorrect. The ALTER DATABASE CREATE DATAFILE statement is used to create a new data file, but it does not recover a corrupted data file.

The correct answer is A) The data file cannot be recovered. This option is correct because if the data file is corrupted and no backup is available, there is no way to recover it.

You work as a database administrator for TCS .com. You decided to manage client and server connections using Local Naming method in TCS .com. When you try to connect to the database you get the following error: ERROR: ORA-12154:TNS:couldnot resolve service name Which network configuration files would you look into to resolve this error?
technology databases

  1. snmp.ora

  2. names.ora

  3. spfile.ora

  4. sqlnet.ora

  5. listener.ora

  6. tnsnames.ora

Show answer
Correct Option: D,F

You work as a database administrator for TCS .com. In your production database, the size of Database Buffer Cache needs to be increased immediately for the current as well as future instances of the database. The Oracle instance has been configured to accommodate any changes in the size of the memory structures. At this is production database, you want to accomplish this task with no impact on the user's connections. Which activity must you have completed before accomplishing this task?

technology databases

  1. You must have started the database instance in restricted mode.

  2. You must have started the database instance in NORMALmode.

  3. You must have started the database instance with server parameter file.

  4. You must have started the database instance but must not have mounted.

  5. You must have started the database instance but must not have opened.

Show answer
Correct Option: C

AI Explanation

To increase the size of the Database Buffer Cache without impacting user connections, you must have started the database instance with a server parameter file (SPFILE).

Explanation for the options:

A) Starting the database instance in restricted mode is not necessary for increasing the size of the Database Buffer Cache. Restricted mode is typically used for performing maintenance activities or troubleshooting specific issues.

B) Starting the database instance in NORMAL mode is not the correct option because it does not specify the use of a server parameter file (SPFILE), which is required to make changes to the memory structures.

C) This is the correct option. Starting the database instance with a server parameter file allows you to make changes to memory structures dynamically, including increasing the size of the Database Buffer Cache.

D) Starting the database instance without mounting it would not allow you to make changes to the memory structures.

E) Starting the database instance but not opening it would not allow you to make changes to the memory structures.

Therefore, the correct answer is C) You must have started the database instance with a server parameter file.

Your TCS .com database is in ARCHIVELOG mode. The data file that belongs to the SYSTEMtablespacehas become corrupted. Up to what point can you recover the database?

technology databases

  1. Until last commit

  2. Until the time you perform recovery

  3. Until the time the date file got corrupted

  4. Until the point where the last transaction begun

  5. You cannot recover the SYSTEM tablespaceand must re-create the database.

Show answer
Correct Option: A

You work as a database administrator for TCS .com. The UNDO_RETENTION parameter in your database is set to 1000 and undoretention is not guaranteed. Which statement regarding retention of undo data is correct?
technology databases

  1. Undo data becomes obsolete after 1,000 seconds.

  2. Undo data gets refreshed after 1,000 seconds.

  3. Undo data will be stored permanently after 1,000 seconds.

  4. Committed undo data would be retained for 1,000 seconds if free undo space is available.

  5. Undo data will be retained in the UNDOtablespacefor 1,000 seconds, then it gets movedmovedto the TEMPORARY tablespace to provide read consistency.

Show answer
Correct Option: D

You work as a database administrator for TCS .com. On a Monday morning, you find the database instance aborted. After inspecting the alert log file, you execute the STARTUP command in SQL*Plus to bring the instance up. What statement is true?

technology databases

  1. PMON coordinates media recovery.

  2. SMON coordinates instance recovery.

  3. PMON coordinates instance recovery.

  4. Undo Advisor would roll back all uncommitted transactions.

  5. SQL*PLUS reports an error with the message asking you to perform instance recovery.

Show answer
Correct Option: B

AI Explanation

To answer this question, you need to understand the roles of various background processes in Oracle database.

Option A) PMON coordinates media recovery - This option is incorrect. PMON (Process Monitor) is responsible for cleaning up the resources of failed or terminated processes. It does not coordinate media recovery.

Option B) SMON coordinates instance recovery - This option is correct. SMON (System Monitor) is responsible for coordinating instance recovery. When an instance aborts or crashes, SMON ensures that the database is recovered to a consistent state when it is brought back up.

Option C) PMON coordinates instance recovery - This option is incorrect. While PMON plays a role in instance recovery by cleaning up failed processes and releasing resources, it does not coordinate the overall instance recovery process.

Option D) Undo Advisor would roll back all uncommitted transactions - This option is unrelated to the situation described in the question. The Undo Advisor is a feature that helps optimize undo retention and undo space allocation.

Option E) SQL*PLUS reports an error with the message asking you to perform instance recovery - This option is incorrect. SQL*Plus is a command-line interface tool for Oracle database, and it does not report any error related to instance recovery. It is the responsibility of the background processes (such as SMON) to coordinate instance recovery.

The correct answer is B) SMON coordinates instance recovery. This option is correct because SMON is responsible for coordinating instance recovery, ensuring that the database is recovered to a consistent state when the instance is brought back up.

You work as a database administrator for TCS .com. The database is open. A media failure has occurred, resulting in loss of all the control files in your database. Which statement regarding the database instance is true in this scenario?
technology databases

  1. The instance would hang.

  2. The instance needs to be shut down.

  3. The instance would be in the open state.

  4. The instance would abort in such cases.

  5. The instance would be in the open and invalid state.

  6. The instance would in the open state, but all the background processes will be restarted.

Show answer
Correct Option: D

You are working on the TCS database. What is the default name of the alert log file in this database?

technology databases

  1. alert_TCS.log

  2. alertlog_TCS.log

  3. TCS _alert_log.log

  4. log_alert_TCS.log

  5. trace_alert_TCS.log

Show answer
Correct Option: A

Average count of orders. This is an example of:
technology enterprise content management

  1. Additive Fact

  2. Semi Additive Fact

  3. Non Additve Fact

  4. None of the above

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Correct Option: B

The fact in which flags/dates are maintained for each state of the fact event is an example of
technology enterprise content management

  1. Transaction

  2. Periodic Snapshot

  3. Accumulating Snapshot

  4. None of the above

Show answer
Correct Option: C