Operating System — Test 16

Correct Answer: B. B. Is a data structure. it contains information related to a process such as process state, program counter, cpu register, etc. process control block is also known as task control block. ???? enroll for free data structure certification - january 2026
Explanation: A Process Control Block (PCB) is a data structure. It contains information related to a process such as Process State, Program Counter, CPU Register, etc. Process Control Block is also known as Task Control Block.

Correct Answer: C. C. Process table
Explanation: The entry of all the PCBs of the current processes is in Process Table. The Process Table has the status of each and every process that is created in OS along with their PIDs.

Correct Answer: D. D. The number of processes in memory
Explanation: Multiprogramming means the number of processes are in the ready states. To increase utilization of CPU, Multiprogramming is one of the most important abilities of OS. Generally, a single process cannot use CPU or I/O at all time, whenever CPU or I/O is available another process can use it. By doing this CPU utilization is increased.

Correct Answer: A. A. Only one task at a time
Explanation: A single thread of control allows the process to perform only one task at a time. In the case of multi-core, multiple threads can be run simultaneously and can perform multiple tasks at a time.

Correct Answer: C. C. To increase cpu utilization
Explanation: The objective of multiprogramming is to increase CPU utilization. Generally, a single process cannot use CPU or I/O at all time, whenever CPU or I/O is available another process can use it. Multiprogramming offers this ability to OS by keeping multiple programs in a ready queue.

Correct Answer: D. D. Bootstrap program

Correct Answer: B. B. Executing a special operation called system call

Correct Answer: B. B. Software generated interrupt caused by an error

Correct Answer: C. C. Interrupt service routine

Correct Answer: A. A. It is an address that is indexed to an interrupt handler