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Welcome to the Recovery System MCQs Page

Dive deep into the fascinating world of Recovery System with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Recovery System, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Recovery System, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

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Check out the MCQs below to embark on an enriching journey through Recovery System. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Recovery System. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Recovery System MCQs | Page 5 of 10

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Q41.
If a transaction does not modify the database until it has committed it is said to use a _______ modification technique

a.

Deferred

b.

Immediate

c.

More than one of the mentioned

d.

None of the mentioned

Discuss
Answer: (a).Deferred
Q42.
We say that a transaction has been ________ when its commit log record has been output to stable storage.

a.

Locked

b.

Completed

c.

Committed

d.

Released

Discuss
Answer: (c).Committed
Q43.
State true or false: Using checkpoints reduces overhead

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q44.
A __________ checkpoint is a checkpoint where transactions are allowed to perform updates even while buffer blocks are being written out.

a.

Temporary

b.

Fuzzy

c.

Permanent

d.

Recovery

Discuss
Answer: (b).Fuzzy
Q45.
If the database modifications occur while the transaction is still active, the transaction is said to use the __________ modification technique

a.

Deferred

b.

Immediate

c.

More than one of the mentioned

d.

None of the mentioned

Discuss
Answer: (b).Immediate
Q46.
The log is a sequence of _________ recording all the update activities in the database.

a.

Log records

b.

Records

c.

Entries

d.

Redo

Discuss
Answer: (a).Log records
Q47.
The current copy of the database is identified by a pointer, called ____________ which is stored on disk.

a.

Db-pointer

b.

Update log

c.

Update log records

d.

All of the mentioned

Discuss
Answer: (a).Db-pointer
Q48.
A special redo-only log record <Ti , Xj , V1> is written to the log, where V1 is the value being restored to data item Xj during the rollback. These log records are sometimes called

a.

Log records

b.

Records

c.

Compensation log records

d.

Compensation redo records

Discuss
Answer: (c).Compensation log records
Q49.
In order to reduce the overhead in retrieving the records from the storage space we use

a.

Logs

b.

Log buffer

c.

Medieval space

d.

Lower records

Discuss
Answer: (b).Log buffer
Q50.
The order of log records in the stable storage ____________ as the order in which they were written to the log buffer.

a.

Must be exactly the same

b.

Can be different

c.

Is opposite

d.

Can be partially same

Discuss
Answer: (a).Must be exactly the same
Page 5 of 10

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