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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 1 of 10

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Q1.
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
Q2.
In the ___________ scheme, a transaction that wants to update the database first creates a complete copy of the database.

a.

Shadow copy

b.

Shadow Paging

c.

Update log records

d.

All of the mentioned

Discuss
Answer: (a).Shadow copy
Q3.
The ____________ scheme uses a page table containing pointers to all pages; the page table itself and all updated pages are copied to a new location.

a.

Shadow copy

b.

Shadow Paging

c.

Update log records

d.

All of the mentioned

Discuss
Answer: (b).Shadow Paging
Q4.
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
Q5.
If a transaction does not modify the database until it has committed, it is said to use the ___________ technique.

a.

Deferred-modification

b.

Late-modification

c.

Immediate-modification

d.

Undo

Discuss
Answer: (a).Deferred-modification
Q6.
If database modifications occur while the transaction is still active, the transaction is said to use the ___________technique.

a.

Deferred-modification

b.

Late-modification

c.

Immediate-modification

d.

Undo

Discuss
Answer: (c).Immediate-modification
Q7.
____________ using a log record sets the data item specified in the log record to the old value.

a.

Deferred-modification

b.

Late-modification

c.

Immediate-modification

d.

Undo

Discuss
Answer: (d).Undo
Q8.
In the __________ phase, the system replays updates of all transactions by scanning the log forward from the last checkpoint.

a.

Repeating

b.

Redo

c.

Replay

d.

Undo

Discuss
Answer: (b).Redo
Q9.
The actions which are played in the order while recording it is called ______________ history.

a.

Repeating

b.

Redo

c.

Replay

d.

Undo

Discuss
Answer: (a).Repeating
Q10.
A special redo-only log record 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
Page 1 of 10

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