Computer Operating System Mcqs

101- Real-time operating systems are designed to:

A. Handle tasks within a guaranteed time
B. Process batch jobs
C. Manage files
D. Run only games

Answer : A. Handle tasks within a guaranteed time

102- Batch processing operating systems:

A. Execute jobs without user interaction
B. Allow multiple users at the same time
C. Run GUI programs only
D. Are used for real-time embedded systems

Answer : A. Execute jobs without user interaction

103- Device drivers are:

A. Memory units
B. Hardware devices
C. User applications
D. Software programs that allow OS to communicate with hardware

Answer : D. Software programs that allow OS to communicate with hardware

104- Virtual memory allows:

A. Faster printing
B. More memory than physically available
C. Hardware replacement
D. Only input/output operations

Answer : B. More memory than physically available

105- Memory management in OS:

A. Runs application programs
B. Allocates memory to processes efficiently 
C. Prints files
D. Connects devices only

Answer : B. Allocates memory to processes efficiently

106- File management in an OS includes:

A. Managing network resources
B. Scheduling tasks
C. Creating, reading, writing, and deleting files
D. Running multiple CPUs

Answer : C. Creating, reading, writing, and deleting files

107- Distributed operating systems:

A. Manage multiple independent computers as a single system
B. Work on one computer
C. Run batch jobs only
D. Are used in mobile phones

Answer : A. Manage multiple independent computers as a single system

108- Security features of an OS include:

A. CPU scheduling
B. Printing
C. Memory allocation
D. User authentication and access control

Answer : D. User authentication and access control

109- Graphical interface is easier for beginners because:

A. It cannot run applications
B. It requires high CPU usage
C. It provides icons, menus, and windows
D. It uses text commands only

Answer : C. It provides icons, menus, and windows

110- Input/output device management ensures:

A. Efficient device utilization
B. Memory allocation
C. CPU scheduling only
D. File storage

Answer : A. Efficient device utilization

111- OS updates are important for:

A. Fixing bugs and improving security
B. Increasing hardware
C. Running applications
D. Replacing memory

Answer : A. Fixing bugs and improving security

112- Menu-driven interfaces allow users to:

A. Allocate memory
B. Run batch jobs
C. Enter text commands
D. Select commands from menus

Answer : D. Select commands from menus

113- Virtual memory uses:

A. CPU cores
B. Hard disk space to extend memory
C. Input devices
D. RAM only

Answer : B. Hard disk space to extend memory

114- Multi-user OS is commonly used in:

A. Mobile phones
B. Embedded systems
C. Laptops
D. Mainframes and servers

Answer : D. Mainframes and servers

115- Real-time operating systems are critical in:

A. Web browsing
B. Gaming
C. Industrial automation and medical devices
D. Word processing

Answer : C. Industrial automation and medical devices

116- Command-line OS is preferred when:

A. Low memory usage is needed
B. Graphics are required
C. GUI is mandatory
D. Touch input is needed

Answer : A. Low memory usage is needed

117- Scheduling algorithms include:

A. File storage
B. Only batch processing
C. First-Come-First-Served, Shortest Job Next 
D. Printing and scanning

Answer : C. First-Come-First-Served, Shortest Job Next

118- Multi-tasking and multi-threading OS increase:

A. Storage capacity
B. Output devices
C. CPU efficiency and speed
D. Memory usage only

Answer : C. CPU efficiency and speed

119- Operating system provides platform for:

A. File storage
B. Input devices
C. Printing
D. Running applications

Answer : D. Running applications

120- Security in OS prevents:

A. Memory allocation
B. Unauthorized access
C. File creation
D. CPU scheduling

Answer : B. Unauthorized access

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