MCQ on Operating Systems – Computer GK
Useful and informative MCQ on Operating Systems – Computer GK that include topics like Operating System, Process Management, Memory Management, File Management, Device Management, Security, Command Interpretation, OS Capability, etc.
These MCQ on Operating Systems – Computer GK are very helpful for competitive exams such as CPCT, GATE, IES/ESE, IBPS PO, IBPS Clerk, SBI PO, SBI Clerk, RBI, SEBI, LIC, NICL, BCA, B.Sc. IT, DCA, SSC, RRB, NIELIT CCC, CTET, UDC NET, CUET, MCA, PGDCA, MCS, TET, State Police, BPO, etc.
These MCQ on Operating Systems – Computer GK have correct answers and brief explanations of each question for better understanding.
Q1. What are the main functions of an Operating System?
a) Memory Management
b) Processor Management
c) Device Management
d) All of the above
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Correct Answer: d) All of the above
Explanation: An Operating System (OS) is an interface between a computer user and computer hardware. It performs various functions, including memory management, processor management, device management, and file management. Memory management involves allocating and deallocating memory to processes, while processor management deals with scheduling and executing processes. Device management handles the allocation and control of peripheral devices, and file management is responsible for organizing and managing files on storage devices.
Q2. What is multiprogramming in an operating system?
a) Running multiple programs on a single processor
b) Running a single program on multiple processors
c) Running multiple programs on multiple processors
d) None of the above
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Correct Answer: a) Running multiple programs on a single processor
Explanation: Multiprogramming is a technique in operating systems where multiple programs can execute concurrently on a single processor. The primary goal of multiprogramming is to maximize resource utilization by keeping the processor busy with multiple tasks.
Q3. What is the difference between multitasking and multithreading?
a) Multitasking involves running multiple programs simultaneously, while multithreading involves running multiple threads within a single program
b) Multitasking involves running multiple threads within a single program, while multithreading involves running multiple programs simultaneously
c) Multitasking and multithreading are the same concepts
d) None of the above
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Correct Answer: a) Multitasking involves running multiple programs simultaneously, while multithreading involves running multiple threads within a single program
Explanation: Multitasking is a technique in operating systems that allows multiple programs to run concurrently, sharing system resources such as CPU, memory, and I/O devices. On the other hand, multithreading is a technique where a single program is divided into multiple independent units called threads, which can be executed concurrently within the same process.
Q4. What is multiprocessing in an operating system?
a) Running multiple programs on a single processor
b) Running a single program on multiple processors
c) Running multiple programs on multiple processors
d) None of the above
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Correct Answer: b) Running a single program on multiple processors
Explanation: Multiprocessing is a technique in operating systems where a single program can be executed on multiple processors simultaneously. This allows for faster execution of the program and improved system performance.
Q5. What is time-sharing in an operating system?
a) Allocating a fixed amount of time for each process to run
b) Sharing system resources among multiple users
c) Running multiple programs on a single processor
d) Running a single program on multiple processors
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Correct Answer: a) Allocating a fixed amount of time for each process to run
Explanation: Time-sharing is a technique in operating systems where each process is allocated a fixed amount of time, called a time slice or quantum, to run on the processor. This allows multiple processes to share the processor, giving the appearance of simultaneous execution.
Q6. What is the difference between uniprogramming and multiprogramming models in memory management?
a) Uniprogramming allows only one program to run at a time, while multiprogramming allows multiple programs to run concurrently
b) Uniprogramming allows multiple programs to run concurrently, while multiprogramming allows only one program to run at a time
c) Uniprogramming and multiprogramming are the same concepts
d) None of the above
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Correct Answer: a) Uniprogramming allows only one program to run at a time, while multiprogramming allows multiple programs to run concurrently
Explanation: Uniprogramming is a memory management model where only one program can run at a time, occupying the entire memory space. In contrast, multiprogramming allows multiple programs to run concurrently, sharing the memory space. The primary goal of multiprogramming is to maximize resource utilization by keeping the processor busy with multiple tasks.
Q7. What is virtual memory in an operating system?
a) A memory management technique that allows a program to use more memory than physically available
b) A memory management technique that allows a program to use less memory than physically available
c) A memory management technique that allows a program to use only the physically available memory
d) None of the above
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Correct Answer: a) A memory management technique that allows a program to use more memory than physically available
Explanation: Virtual memory is a memory management technique in operating systems that allows a program to use more memory than is physically available on the system. It achieves this by using a combination of physical memory and disk space, creating the illusion of a larger memory space for the program. Virtual memory allows for more efficient use of system resources and enables the execution of larger programs.
Q8. What are the main file access methods in an operating system?
a) Sequential access, direct access, and indexed access
b) Sequential access, random access, and indexed access
c) Sequential access, direct access, and random access
d) Direct access, random access, and indexed access
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Correct Answer: c) Sequential access, direct access, and random access
Explanation: There are three main file access methods in an operating system: sequential access, direct access, and random access. Sequential access involves reading or writing data in a linear, predetermined order. Direct access allows data to be read or written at any location within the file, without the need to access data sequentially. Random access is similar to direct access, but it involves accessing data at random locations within the file.
Q9. What are the main file operations in an operating system?
a) Create, open, read, write, and close
b) Create, open, read, write, and delete
c) Create, open, read, write, close, and delete
d) None of the above
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Correct Answer: c) Create, open, read, write, close, and delete
Explanation: The main file operations in an operating system include creating a new file, opening an existing file, reading data from a file, writing data to a file, closing a file, and deleting a file. These operations allow users and programs to interact with the file system and manage their data.
Q10. What is the purpose of file naming in an operating system?
a) To provide a unique identifier for each file
b) To organize files in a hierarchical structure
c) To control access to files
d) None of the above
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Correct Answer: a) To provide a unique identifier for each file
Explanation: File naming in an operating system serves the purpose of providing a unique identifier for each file. This allows users and programs to locate and access files easily. File names can also include additional information, such as file type or version, to help users identify the contents of a file.
More MCQ on Computer GK for Competitive Exams
- Introduction to Computer
- Basic Computer Organization
- Number Systems
- Computer Codes
- Processor and Memory
- Secondary Storage Devices
- Input and Output Devices
- Computer Software
- Flowchart and Computer Languages
- System Implementation
- Operating Systems
- Application Software Packages
- Business Data Processing
- Communications and Networks
- Internet Concepts and IoT
- Multimedia and File Extensions
- Classification of Computers
- Cyber Safety and Cyber Crime
- Computer Viruses and Security
- Basic Computer Shortcut Keys
- Shortcut Keys for Windows
- Shortcut Keys for MS Excel
- Shortcut Keys for MS Word
- Computer Abbreviations Set 1
- Computer Abbreviations Set 2
- Computer Abbreviations Set 3
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