AMU MCA Operating System Previous Year Question Paper and Solution with PDF

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AMU MCA Previous Year Questions (PYQs)

AMU MCA Operating System PYQ

Qus : 1 AMU MCA PYQ

System CPU time is defined as:

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Solution

System CPU time = kernel execution time.

Qus : 2 AMU MCA PYQ

Which of the following system call is used to create new process in UNIX operating system?

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Solution

New process is created using fork().

Qus : 3 AMU MCA PYQ

The Banker's theorem is associated with which of the following concept?

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Solution

Banker’s Algorithm is used for deadlock avoidance in operating systems.

Qus : 4 AMU MCA PYQ

Which access method is used to obtain a record from a cassette tape?

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Solution

Cassette tape uses sequential access method.

Qus : 5 AMU MCA PYQ

The directory can be viewed as ………… that translate filenames into their directory entries

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Solution

A directory maps file names to metadata entries, just like a symbol table.

Qus : 6 AMU MCA PYQ

A semaphore is a shared integer variable

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Solution

Semaphore value is never allowed to become negative.

Qus : 7 AMU MCA PYQ

Match the following for Unix system calls:

List–I	List-II
1. exec	(i) Creates a new process
2.brk	(ii) Invokes another program overlaying memory space with a copy of an executable file
3. wait	(iii) To increase or decrease the size of data region
4. fork	(iv) A process synchronizes with termination of child process

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Solution

exec → overlays program ⇒ (ii)

brk → changes data size ⇒ (iii)

wait → waits for child ⇒ (iv)

fork → creates process ⇒ (i)

Qus : 8 AMU MCA PYQ

What is a critical section?

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AMU MCA Previous Year PYQ AMU MCA AMU MCA 2025 PYQ

Solution

Critical section is the part of program where shared resources are accessed.

Qus : 9 AMU MCA PYQ

Data Mining can be used as a ………… tool.

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Solution

Data mining is mainly used as a research and analysis tool to discover patterns.

Qus : 10 AMU MCA PYQ

Every process consists of two steps CPU and I/O bursts. An I/O bound program will lead to:

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Solution

I/O bound programs spend more time in I/O, leading to low CPU utilization.

Qus : 11 AMU MCA PYQ

Initial value of the semaphore is to allow only one of the many processes to enter their critical section is:

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Solution

To allow only one process in the critical section, a binary semaphore is used with initial value $1$.

Qus : 12 AMU MCA PYQ

How does the software trigger an interrupt?

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Solution

Software interrupt is generated by executing a system call instruction.

Qus : 13 AMU MCA PYQ

Which of the following system call is used to create new process in UNIX operating system?

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AMU MCA Previous Year PYQ AMU MCA AMU MCA 2022 PYQ

Solution

fork() creates a new child process in UNIX.

Qus : 14 AMU MCA PYQ

What is the name of storage device which is used to compensate for the difference in rates of flow of data from one device to another?

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Solution

A buffer temporarily stores data to handle speed mismatch between devices.

Qus : 15 AMU MCA PYQ

The first operating system of Micro-processor is …………

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Solution

The first widely used OS for microprocessors was CP/M (Control Program for Microcomputers).

Qus : 16 AMU MCA PYQ

The time interval from the time of submission of a process to the time of completion is:

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Solution

Turnaround time = Completion time − Arrival time.

Qus : 17 AMU MCA PYQ

What are two types of semaphores?

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Solution

Semaphores are classified into Counting and Binary semaphores.

Qus : 18 AMU MCA PYQ

Which statement is true about process 0 in the Unix operating system?

I. Process 0 is called init process.

II. Process 0 is not created by fork system call.

III. After forking process 1, process 0 becomes swapper process.

IV. Process 0 is a special process created when system boots.

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Solution

Process 0 is created at boot, not by fork, becomes swapper, and is special. Init is process 1, not process 0.

Qus : 19 AMU MCA PYQ

The criteria for calculation of priority of a process are:

(A) Weight assigned to the group of user

(B) Processor utilization by an individual process

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Solution

All listed factors are considered in fair scheduling.

Qus : 20 AMU MCA PYQ

A front-end processor is usually used in

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Solution

Front-end processors are mainly used for I/O handling in time-sharing systems.

Qus : 21 AMU MCA PYQ

Find number of page faults for FIFO (First In First Out) page replacement policy if only 3 pages can be loaded at time Reference string: 5, 4, 3, 2, 1, 4, 3, 5, 4, 3, 2, 1, 5

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Solution

Simulating FIFO with 3 frames:

5 F

5 4 F

5 4 3 F

4 3 2 F

3 2 1 F

2 1 4 F

1 4 3 F

4 3 5 F

3 5 4 F

5 4 3 F

4 3 2 F

3 2 1 F

2 1 5 F

Total page faults = 13

Qus : 22 AMU MCA PYQ

Which of these data types is used by operating system to manage recursion in Java/C/C++?

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Solution

Recursion uses function call stack (LIFO).

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