Operating System Quiz

Which of the following is used to invoke system calls?

• An indirect jump

• A software interrupt

• A privileged instruction

• Polling

Which of the below statements are False?

• User level threads are not scheduled by the kernel

• Context switching between user level threads is faster than context switching between kernel level threads

• When a user level thread is blocked, all other threads of its process are blocked

• Kernel level threads cannot share the code segment.

What does the principle of locality justify the use of?

• Cache memory

• Polling

• Interrupts

• DMA

When a process executes the code fork(); fork(); fork(); What are the total number of child processes created?

• 7

• 3

• 8

• 4

When an input occurs, an operating system ______

• Always resumes execution of interrupted process after processing the interrupt

• Ignore the interrupt .

• May change state of interrupted process to "blocked" and schedule other process

• Always changes state of interrupted process after processing the interrupt.

State whether the following statement is TRUE or FALSE with reason. The data transfer between memory and I/O devices using programmed I/O is faster than interrrupt-driven I/O.

• True

• False

Name the program in the operating system that does processor management.

• Traffic controller

• Process scheduler

• Job scheduler

• Dispatcher

_______ is not an advantage of multiprogramming.

• Shorter response time

• Ability to assign priorities to job

• Decreased operating system overhead

• Increased throughout

What is the sequence of directories and subdirectories that the operating system must follow to find a specific file?

• Extension

• Path

• External command

• Internal command

What does an operating system do?

• An interface that regulates hardware and software programs

• A hardware device

• A program that operates the hardware devices

• All of the above