Unix Questions

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1.

In UNIX, the set of masked signals can be set or cleared using the ________ function.

A

sigmask

B

sigmaskproc

C

sigprocmask

D

sigproc

Correct Answer: C

None.

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2.

The usual effect of abnormal termination of a program is ____________

A

core dump file generation

B

system crash

C

program switch

D

signal destruction

Correct Answer: A

None.

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3.

In UNIX, the abort() function sends the ________ signal to the calling process, causing abnormal termination.

A

SIGTERM

B

SIGSTOP

C

SIGABORT

D

SIGABRT

Correct Answer: D

None.

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4.

In UNIX, the ______________ system call is used to send a signal.

A

sig

B

send

C

kill

D

sigsend

Correct Answer: C

None.

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5.

What are the characteristics of Unix semantics?

A

Easy to implement in a single processor system

B

Data cached on a per process basis using write through case control

C

Write-back enhances access performance

D

All of the mentioned

Correct Answer: D

None.

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6.

What are the characteristics of transaction semantics?

A

Suitable for applications that are concerned about coherence of data

B

The users of this model are interested in the atomicity property for their transaction

C

Easy to implement in a single processor system

D

Write back enhances access performance

Correct Answer: B

None.

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7.

What are non characteristics of session semantics?

A

Each client obtains a working copy from the server

B

When file is closed, the modified file is copied to the file server

C

The burden of coordinating file sharing is ignored by the system

D

Easy to implement in a single processor system

Correct Answer: D

None.

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8.

Which symbol will be used with grep command to match the pattern pat at the beginning of a line?

A

^pat

B

$pat

C

pat$

D

pat^

E

None of the above

Correct Answer: A

None.

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9.

Which command is used to sort the lines of data in a file in reverse order

A

sort

B

sh

C

st

D

sort -r

E

None of the above

Correct Answer: D

None.

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10.

Which command is used to display the top of the file?

A

cat

B

head

C

more

D

grep

E

None of the above

Correct Answer: B

None.

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