Operating Systems – Multiple Choice Questions (MCQs)

1. 37. What is input/output (I/O) management?

   • A. The process of controlling the transfer of data between the computer and its peripheral devices
   • B. The process of managing memory
   • C. The process of scheduling processes
   • D. The process of managing files

2. 38. What is polling in I/O?

   • A. The CPU repeatedly checks the status of a device
   • B. The device interrupts the CPU when it's ready
   • C. Data is transferred directly between the device and memory
   • D. The OS uses a dedicated I/O processor

3. 39. What is interrupt-driven I/O?

   • A. The CPU repeatedly checks the status of a device
   • B. The device signals the CPU when it needs attention
   • C. Data is transferred directly between the device and memory
   • D. The OS uses a dedicated I/O processor

4. 40. What is Direct Memory Access (DMA)?

   • A. The CPU directly accesses peripheral devices
   • B. Peripheral devices transfer data directly to or from memory without CPU intervention
   • C. The OS manages all I/O transfers
   • D. A technique for speeding up CPU access to memory

5. 41. What is a system call?

   • A. A request from a user-level program to the operating system kernel
   • B. A call between two user-level programs
   • C. A hardware interrupt
   • D. A kernel thread

6. 42. Which of the following is a type of system call?

   • A. Process control
   • B. Memory management
   • C. File management
   • D. Device management

7. 43. What is a monolithic kernel?

   • A. An OS structure where all kernel services run within a single address space
   • B. An OS structure where kernel services are divided into modules
   • C. An OS structure with a microkernel and user-level servers
   • D. An OS structure with a layered approach

8. 44. What is a microkernel?

   • A. An OS structure where all kernel services run within a single address space
   • B. An OS structure where the kernel provides minimal services
   • C. and other services run in user space
   • D. An OS structure with a layered approach

9. 45. What is a hybrid kernel?

   • A. An OS structure that combines aspects of monolithic and microkernels
   • B. An OS structure that is purely monolithic
   • C. An OS structure that is purely microkernel-based
   • D. An OS structure with a layered architecture

10. 46. What is a layered operating system?

    • A. An OS structure where components are organized in a hierarchy of layers
    • B. An OS structure where all components are in one layer
    • C. An OS structure with a microkernel
    • D. An OS structure with modular components

11. 47. What is a virtual machine?

    • A. A software-based emulation of a computer system
    • B. A physical computer
    • C. A network device
    • D. An operating system itself

12. 48. What is concurrency in operating systems?

    • A. The ability of multiple processes or threads to execute seemingly simultaneously
    • B. The sequential execution of processes
    • C. The termination of processes
    • D. The allocation of memory