Explore topic-wise MCQs in Operating System.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System knowledge and support exam preparation. Choose a topic below to get started.

1.

A process is moved to wait queue when I/O request is made with ____________

A. non-blocking I/O
B. blocking I/O
C. asynchronous I/O
D. synchronous I/O
Answer» C. asynchronous I/O
Discussion
2.

Which one of the following connects high-speed high-bandwidth device to memory subsystem and CPU.

A. Expansion bus
B. PCI bus
C. SCSI bus
D. None of the mentioned
Answer» B. PCI bus
Discussion
3.

Which buffer holds the output for a device?

A. spool
B. output
C. status
D. magic
Answer» B. output
Discussion
4.

The device-status table contains ____________

A. each I/O device type
B. each I/O device address
C. each I/O device state
D. all of the mentioned
Answer» E.
Discussion
5.

Which hardware triggers some operation after certain programmed count?

A. programmable interval timer
B. interrupt timer
C. programmable timer
D. none of the mentioned
Answer» B. interrupt timer
Discussion
6.

Device drivers are implemented to interface ____________

A. character devices
B. block devices
C. network devices
D. all of the mentioned
Answer» E.
Discussion
7.

When hardware is accessed by reading and writing to the specific memory locations, then it is called ____________

A. port-mapped I/O
B. controller-mapped I/O
C. bus-mapped I/O
D. none of the mentioned
Answer» E.
Discussion
8.

The host sets _____ bit when a command is available for the controller to execute.

A. write
B. status
C. command-ready
D. control
Answer» D. control
Discussion
9.

The data-in register of I/O port is ____________

A. Read by host to get input
B. Read by controller to get input
C. Written by host to send output
D. Written by host to start a command
Answer» B. Read by controller to get input
Discussion
10.

I/O hardware contains ____________

A. Bus
B. Controller
C. I/O port and its registers
D. All of the mentioned
Answer» E.
Discussion
11.

A_PROCESS_IS_MOVED_TO_WAIT_QUEUE_WHEN_I/O_REQUEST_IS_MADE_WITH?$

A. non-blocking I/O
B. blocking I/O
C. asynchronous I/O
D. synchronous I/O
Answer» C. asynchronous I/O
Discussion
12.

Which one of the following connects high-speed high-bandwidth device to memory subsystem and CPU?

A. Expansion bus
B. PCI bus
C. SCSI bus
D. None of the mentioned
Answer» B. PCI bus
Discussion