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Process Management Questions

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Choose the correct option.

The time required to create a new thread in an existing process is


Agreater than the time required to create a new process

Bless than the time required to create a new process

Cequal to the time required to create a new process

DNone of these

Answer: Option B

Explanation:

a

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Choose the correct option.

When the event for which a thread is blocked occurs,


Athread moves to the ready queue

Bthread remains blocked

Cthread completes

Da new thread is provided

Answer: Option A

Explanation:

A thread is said to be in the blocked state when it tries to access a protected section of code that is currently locked by some other thread. When the protected section is unlocked, the scheduler picks one of the thread which is blocked for that section and moves it to the ready queue.

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The jacketing technique is used to


Aconvert a blocking system call into nonblocking system call

Bcreate a new thread

Ccommunicate between threads

Dterminate a thread

Answer: Option A

Explanation:

Here is no explanation for this answer

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Termination of the process terminates


Afirst thread of the process

Bfirst two threads of the process

Call threads within the process

Dno thread within the process

Answer: Option C

Explanation:

Here is no explanation for this answer

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Which one of the following is not a valid state of a thread?


Arunning

Bparsing

Cready

Dblocked

Answer: Option B

Explanation:

The various states for a thread are-

1. New or Start state

2. Ready state

3. Running state

4. Blocked state

5. Terminated or Exit state

Hence, option B is the odd one out.

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Which technique is used by operating systems to execute several programs concurrently by switching back and forth


APartitioning

BMultitasking

CWindowing

DPaging

Answer: Option C

Explanation:

Here is no explanation for this answer

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Semaphores are used to solve the problem of


Arace condition

Bprocess synchronization

Cmutual exclusion

Dbelady problem

Answer: Option B

Explanation:

According to me, the correct answer should be option B. Semaphores, as we clearly know are synchronization tools and are meant to solve the problems of process synchronization. For mutual exclusion, we can make use of Monitors, as monitors have a property for achieving mutual exclusion. The process can be active in a monitor at any instant, so the programmer need not code the synchronization constraint explixitly.

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For multiprogramming operating system


Aspecial support from processor is essential

Bspecial support from processor is not essential

Ccache memory is essential

DNone of Above

Answer: Option B

Explanation:

Here is no explanation for this answer

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What is the scheduling algorithm used in general operating systems.


AFCFS algorithm

BHighest Priority First algorithm

CRound-Robin algorithm

DNone of the above

Answer: Option C

Explanation:

Here is no explanation for this answer

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Condition for deadlock occurance


AMutual Exclusion

Bno premption

Chold and wait

Dcircular wait

EAll of the above

Answer: Option E

Explanation:

Deadlock can arise if the following four conditions hold simultaneously (Necessary Conditions)

Mutual Exclusion: One or more than one resource is non-sharable (Only one process can use at a time)
Hold and Wait: A process is holding at least one resource and waiting for resources.
No Preemption: A resource cannot be taken from a process unless the process releases the resource.
Circular Wait: A set of processes are waiting for each other in circular form.

All of the above options are correct.

Workspace

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