Operating System MCQs with Answers
Practice important Operating System MCQs with answers and explanations.
Chapter: 3
Q81:
The command-line interpreter in UNIX is commonly known as __________.
A. shell
B. dashboard
C. terminal
D. CLI shell
Correct Answer:
A
Chapter: 3
Q82:
Which of the following is NOT a category of system calls?
A. Process control
B. File management
C. Device management
D. Memory protection
Correct Answer:
D
Chapter: 3
Q83:
In the system call execution process, what does the trap instruction do?
A. It changes the mode from user to kernel
B. It stores parameters in registers
C. It returns control to the user program
D. It determines the service routine to execute
Correct Answer:
A
Chapter: 3
Q84:
A system call interface allows user processes to access system resources such as files and __________.
A. Memory
B. Devices
C. Users
D. Programs
Correct Answer:
B
Chapter: 3
Q85:
Which method is used to pass parameters between a user program and the operating system?
A. Registers
B. Table in memory
C. Stack
D. All of the above
Correct Answer:
D
Chapter: 3
Q86:
Which of the following is true regarding a timer interrupt in CPU protection?
A. It allows the process to continue indefinitely
B. Prevents the operating system from losing control
C. Stops memory allocation
D. Enables network communication
Correct Answer:
B
Chapter: 3
Q87:
Which of the following tasks is the operating system responsible for in connection with memory management?
A. Allocating free disk space
B. Deallocating memory space
C. Interrupt handling
D. Running programs
Correct Answer:
B
Chapter: 3
Q88:
The command-line interpreter is often referred to as the __________.
A. shell
B. CLI
C. manager
D. OS interface
Correct Answer:
A
Chapter: 3
Q89:
The OS is responsible for ensuring that a process does not __________ another process's memory.
A. Overwrite
B. Interrupt
C. Wait
D. Allocate
Correct Answer:
A
Chapter: 4
Q90:
Which approach to operating system design is based on breaking the OS into layers?
A. Layered Approach
B. Microkernels
C. Virtual Machines
D. Monolithic OS
Correct Answer:
A
Chapter: 4
Q91:
What is the main advantage of the layered approach in OS design?
A. Modularity
B. Speed
C. Portability
D. Flexibility
Correct Answer:
A
Chapter: 4
Q92:
Which OS is an example of a microkernel-based operating system?
A. Windows NT
B. UNIX
C. OS/2
D. Linux
Correct Answer:
C
Chapter: 4
Q93:
The bottom layer in the layered approach of OS design is the __________.
A. hardware
B. application layer
C. system layer
D. user interface
Correct Answer:
A
Chapter: 4
Q94:
In a microkernel architecture, the main kernel function is to __________.
A. provide user interfaces
B. handle memory management
C. provide communication facilities
D. manage file systems
Correct Answer:
C
Chapter: 4
Q95:
Which of the following is an advantage of microkernels?
A. More complex architecture
B. Increased security
C. Fewer user-level processes
D. Higher performance
Correct Answer:
B
Chapter: 4
Q96:
Which operating system structure involves removing all non-essential components from the kernel?
A. Monolithic OS
B. Layered OS
C. Microkernels
D. Virtual Machines
Correct Answer:
C
Chapter: 4
Q97:
Which of these operating systems uses a layered structure?
A. Windows NT
B. OS/2
C. MacOS
D. Xen
Correct Answer:
A
Chapter: 4
Q98:
Which system allows virtual machines to run multiple OS instances?
A. UNIX
B. Windows NT
C. Virtual Machines
D. MacOS
Correct Answer:
C
Chapter: 4
Q99:
The Java Virtual Machine (JVM) is an example of a __________.
A. virtual machine
B. real-time OS
C. monolithic kernel
D. microkernel
Correct Answer:
A
Chapter: 4
Q100:
Which of the following is NOT a component of the UNIX/Linux directory structure?
A. /dev
B. /etc
C. /usr/bin
D. /bin/c
Correct Answer:
D