Computer Operating System Mcqs

81- Multi-threading increases efficiency by:

A. Storing data permanently
B. Displaying output faster
C. Running multiple programs
D. Running multiple threads of a program concurrently

Answer : D. Running multiple threads of a program concurrently

82- Device drivers are necessary because:

A. Hardware cannot function without them
B. Software runs without them
C. They increase storage
D. Users cannot interact without them

Answer : A. Hardware cannot function without them

83- Virtual memory helps when:

A. Only input is used
B. Printer is connected
C. Physical memory is insufficient
D. CPU is idle

Answer : C. Physical memory is insufficient

84- Time-sharing operating systems:

A. Are single-user
B. Are real-time only
C. Allocate CPU time efficiently to multiple users 
D. Only run batch jobs

Answer : C. Allocate CPU time efficiently to multiple users

85- Operating systems provide a platform for:

A. Printing
B. Input/output
C. Hardware
D. Running application software

Answer : D. Running application software

86- Graphical interface benefits include:

A. Easier navigation for users
B. Faster execution
C. Memory management
D. CPU allocation

Answer : A. Easier navigation for users

87- File management ensures:

A. Security
B. Input/output
C. CPU scheduling
D. Data is organized, stored, and retrieved efficiently

Answer : D. Data is organized, stored, and retrieved efficiently

88- Security in operating systems prevents:

A. Memory allocation
B. Unauthorized access to files and resources
C. Device usage
D. CPU scheduling

Answer : B. Unauthorized access to files and resources

89- Multi-processing operating systems:

A. Use multiple CPUs to increase performance
B. Run one program
C. Only manage files
D. Only manage memory

Answer : A. Use multiple CPUs to increase performance

90- Operating system updates are necessary to:

A. Change hardware
B. Run batch jobs only
C. Improve security and fix bugs
D. Delete files

Answer : C. Improve security and fix bugs

91- Command-line interfaces are suitable for:

A. Mobile devices
B. Touchscreen systems
C. Experts who prefer speed and low memory usage
D. Beginners

Answer : C. Experts who prefer speed and low memory usage

92- Menu-driven interfaces are:

A. Only text-based
B. Only graphical
C. Driven by selections from menus
D. Command-based

Answer : C. Driven by selections from menus

93- The main benefit of a multitasking OS is:

A. It allows multiple programs to run simultaneously
B. It increases storage only
C. It manages network connections only
D. It controls input devices only

Answer : A. It allows multiple programs to run simultaneously

94- The main role of an operating system is to:

A. Run only games
B. Connect to the internet
C. Store documents
D. Manage hardware and software resources

Answer : D. Manage hardware and software resources

95- The user interface of an OS allows:

A. Only printing tasks
B. Direct communication between user and hardware
C. Networking
D. Memory allocation

Answer : B. Direct communication between user and hardware

96- Kernel is responsible for:

A. Managing system resources like CPU and memory
B. Displaying icons
C. Connecting printers
D. Running web browsers

Answer : A. Managing system resources like CPU and memory

97- Operating system software is necessary because:

A. It stores files permanently
B. It prints documents
C. Hardware alone cannot function efficiently
D. It replaces hardware

Answer : C. Hardware alone cannot function efficiently

98- A command-line interface (CLI) requires users to:

A. Type text commands
B. Click icons
C. Drag and drop files
D. Use touch gestures

Answer : A. Type text commands

99- Graphical user interface (GUI) allows:

A. Icons, menus, and windows
B. Text-only commands
C. Only printing
D. Only batch jobs

Answer : A. Icons, menus, and windows

100- Multitasking operating systems:

A. Manage devices
B. Manage memory
C. Execute one program at a time
D. Allow multiple programs to run simultaneously

Answer : D. Allow multiple programs to run simultaneously

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