In the __________ phase, the system replays updates of all transactions by scanning the log forward from the last checkpoint.

Consider a transaction T1 that committed prior to checkpoint. The record appears in the log before the record. Any modifications made by T1 must have been written to the stable storage either with the checkpoint or prior to it. Thus at recovery time ____________

A

There is a need to perform an undo operation on T1

B

There is a need to perform a redo operation on T1

C

There is no need to perform an undo and redo operation on T1

D

All of the mentioned

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

log 3 + log 9 + log 27 + ……………i. ধারার পরবর্তী পদ log 81 ii. একটি সমান্তর ধারা iii. এর সাধারণ অন্তর log 6 নিচের কোনটি সঠিক?

A

i ও ii

B

i ও iii

C

ii ও iii

D

i, ii ও iii

log 3 + log 9+log 27+...... i. ধারাটির সাধারণ অনুপাত log 3 ii. ধারাটির প্রথম দশটি পদের সমষ্টি 55 log 3 iii. ধারাটি একটি গুণোত্তর ধারা নিচের কোনটি সঠিক?

A

i

B

ii

C

i ও iii

D

i, ii ও iii

The output of the following Python code is similar to the alphabet . . . . . . . .

import turtlet=turtle.Pen()t1=turtle.Pen()t2=turtle.Pen()t.forward(100)t1.forward(100)t2.forward(100)t1.left(90)t1.forward(75)t2.right(90)t2.forward(75)

A

X

B

N

C

T

D

M

A database has 5 transactions. Of these, 4 transactions include milk and bread. Further, of the given 4 transactions, 2 transactions include cheese. Find the support percentage for the following association rule "if milk and bread are purchased, then cheese is also purchased".

A

0.4

B

0.6

C

0.8

D

0.42

Which of the following statements is/are correct with respect to a Scott-connected transformer? I. It can do 3-phase to 2-phase conversion II. It can do 2-phase to 3-phase conversion III. It can do 2-phase to 4-phase conversion IV. It can do 3-phase to 4-phase conversion

A

Statements IV and II

B

Statement II only

C

Statements III and IV

D

Statements I and II

Which two of the following are true regarding the distance-vector and link-state routing protocols?
1. Link state sends its complete routing table out all active interfaces on periodic time intervals.
2. Distance vector sends its complete routing table out all active interfaces on periodic time intervals.
3. Link state sends updates containing the state of its own links to all routers in the internetwork.
4. Distance vector sends updates containing the state of its own links to all routers in the internetwork.

A

1 only

B

3 only

C

2 and 3 only

D

None of the above

In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person? 1. Iris scanning 2. Retinal scanning 3. Voice recognition Select the correct answer using the code given below.

A

1 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person?
1. Iris scanning
2. Retinal scanning
3. Voice recognition
Select the correct answer:

A

Only 1

B

Only 2 and 3

C

Only 1 and 3

D

1, 2 and 3

In the __________ phase, the system replays updates of all transactions by scanning the log forward from the last checkpoint.

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