Computer Operating System Questions and Answers

Q: Which of the following is not a popular example of an operating system ?

The one that is not an operating system is Opera.Opera is a web browser, like Chrome, Firefox and Edge.The other three are operating systems: Linux is a family of open-source operating systems built on the Linux kernel, Ubuntu is one of the most popular Linux distributions, and Android is Google's Linux-based operating system for phones and tablets.

Q: ___________allows more than one program to run concurrently.

The feature is multitasking.A multitasking operating system lets more than one program (task) run concurrently on the same computer. The processor switches rapidly between tasks, giving each a short slice of time, so a user can, for example, type a document while music plays and a file downloads.Multi user means several users can use the system at the same time, which is about users, not programs. Multiprocessing means the computer has more than one processor, which is hardware rather than the ability to run several programs. A switching system is a telecommunication term.

Q: What is the name of the operating system that reads and reacts in terms of actual time

Correct answer: Real time systemA real-time system must respond within a deadline set by the process it controls, because a correct answer that arrives late is useless - the world has moved on. Batch and time-sharing systems aim at throughput and fair response instead, with no guaranteed deadline.

Q: What is the name given to the software which can be legally compiled and often used for free?

Correct answer: Public domain programA public domain program carries no copyright restriction, so anyone may compile, use, change and redistribute it freely. Shareware is copyrighted and may be tried before purchase but must then be paid for, and firmware describes where a program is stored rather than its licence.

Q: Process is

Correct answer: a program in executionA program is a passive file of instructions on disk; a process is that program actually running, with a program counter, registers, a stack, its own address space and an entry in the process table. One program may have several processes running from it at once.

Q: Which among the following Windows do not have Start button

Correct answer: Windows 8Windows 8 dropped the Start button from the desktop taskbar, replacing the Start menu with the full-screen Start screen - a change so unpopular that Windows 8.1 restored the button and Windows 10 restored the menu. Vista and 7 both have it.

Q: Which of the following capabilities is required for a system program to execute more than one program at a time?

Correct answer: multitaskingRunning more than one program at a time requires multitasking: the system must hold several programs, keep the state of each, and switch the processor between them quickly enough that all appear to advance together. Virtual memory helps by letting them all be resident, but it is the switching that makes concurrency.

Q: Object modules generated by assemblers that contain unresolved external references are resolved for two or more object modules by a/an

Correct answer: linkerEach object module lists the symbols it defines and the external ones it refers to. The linker gathers the modules, matches every reference to a definition, adjusts the addresses accordingly, and produces a single load module. The loader then places that module in memory.

Which of the following is not a popular example of an operating system ?

A.Ubuntu
B.Android
C.Linux
D.Opera

Exam Year(s)

CBSE Assistant Secretary - 2024,

Answer: D

The one that is not an operating system is Opera.

Opera is a web browser, like Chrome, Firefox and Edge.

The other three are operating systems: Linux is a family of open-source operating systems built on the Linux kernel, Ubuntu is one of the most popular Linux distributions, and Android is Google's Linux-based operating system for phones and tablets.

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Which of the following is NOT a Linux-based operating system for the mobile phone?

A.Android
B.WebOS
C.Maemo
D.iPhone OS

Exam Year(s)

DSSSB JE - 2023,

Answer: D

iPhone OS (now iOS) is not Linux based. It was developed by Apple and derives from its own Unix-like Darwin and Mac OS X code, not from the Linux kernel. Android is built on a modified Linux kernel, and WebOS (originally from Palm, later HP and LG) and Maemo (from Nokia) are also Linux-based mobile platforms.

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___________allows more than one program to run concurrently.

A.Multi User.
B.Multi processing
C.Switching system.
D.Multi tasking.

Exam Year(s)

MP Lab Technician - 2015,

Answer: D

The feature is multitasking.

A multitasking operating system lets more than one program (task) run concurrently on the same computer. The processor switches rapidly between tasks, giving each a short slice of time, so a user can, for example, type a document while music plays and a file downloads.

Multi user means several users can use the system at the same time, which is about users, not programs. Multiprocessing means the computer has more than one processor, which is hardware rather than the ability to run several programs. A switching system is a telecommunication term.

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What is the name of the operating system that reads and reacts in terms of actual time

A.Batch system
B.Quick response system
C.Real time system
D.Time sharing system

Answer: C

Correct answer: Real time system

A real-time system must respond within a deadline set by the process it controls, because a correct answer that arrives late is useless - the world has moved on. Batch and time-sharing systems aim at throughput and fair response instead, with no guaranteed deadline.

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What is the name given to the software which can be legally compiled and often used for free?

A.Shareware program
B.Public domain program
C.Firmware program
D.Mindware

Answer: B

Correct answer: Public domain program

A public domain program carries no copyright restriction, so anyone may compile, use, change and redistribute it freely. Shareware is copyrighted and may be tried before purchase but must then be paid for, and firmware describes where a program is stored rather than its licence.

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Process is

A.program in High level language kept on disk
B.contents of main memory
C.a program in execution
D.a job in secondary memory

Answer: C

Correct answer: a program in execution

A program is a passive file of instructions on disk; a process is that program actually running, with a program counter, registers, a stack, its own address space and an entry in the process table. One program may have several processes running from it at once.

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Which among the following Windows do not have Start button

A.Windows Vista
B.Windows 7
C.Windows 8
D.None of above

Answer: C

Correct answer: Windows 8

Windows 8 dropped the Start button from the desktop taskbar, replacing the Start menu with the full-screen Start screen - a change so unpopular that Windows 8.1 restored the button and Windows 10 restored the menu. Vista and 7 both have it.

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Which of the following capabilities is required for a system program to execute more than one program at a time?

A.word processing
B.compiling
C.virtual memory
D.multitasking

Answer: D

Correct answer: multitasking

Running more than one program at a time requires multitasking: the system must hold several programs, keep the state of each, and switch the processor between them quickly enough that all appear to advance together. Virtual memory helps by letting them all be resident, but it is the switching that makes concurrency.

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What problem is solved by Dijkstra's banker's algorithm?

A.mutual exclusion
B.deadlock recovery
C.deadlock avoidance
D.cache coherence

Answer: C

The Banker's algorithm is a resource allocation & deadlock avoidance algorithm developed by Edsger Dijkstra that tests for safety by simulating the allocation of pre-determined maximum possible amounts of all resources, and then makes a "safe-state" check to test for possible deadlock conditions for all other pending activities, before deciding whether allocation should be allowed to continue

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10.

Object modules generated by assemblers that contain unresolved external references are resolved for two or more object modules by a/an

A.operating system
B.loader
C.linker
D.compiler

Answer: C

Correct answer: linker

Each object module lists the symbols it defines and the external ones it refers to. The linker gathers the modules, matches every reference to a definition, adjusts the addresses accordingly, and produces a single load module. The loader then places that module in memory.

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