Multitasking Operating System — Test 1

Correct Answer: B. B. Multitask operating system
Explanation: The multitasking operating system works by dividing the processor’s time into different discrete time slots, that is, each application requires a defined number of time slots to complete its execution.

Correct Answer: C. C. Kernel
Explanation: The operating system kernel decides which task can have the next time slot. So instead of the task executing continuously until completion, the execution of the processor is interleaved with the other tasks.

Correct Answer: C. C. Multitasking kernel
Explanation: The multitasking operating systems are associated with the multitasking kernel which controls the time slicing mechanism.

Correct Answer: C. C. Time slice
Explanation: The time period required for each task for execution before it is stopped and replaced during a context switch is known as the time slice.

Correct Answer: B. B. Hardware interrupt
Explanation: The multitasking operating systems are associated with the multitasking kernel which controls the time slicing mechanism. The time period required for each task for execution before it is stopped and replaced during a context switch is known as the time slice. These are periodically triggered by a hardware interrupt from the system timer.

Correct Answer: B. B. Hardware interrupt
Explanation: The multitasking operating systems deals with the multitasking kernel which controls the time slicing mechanism and the time period required for each task for execution before it is stopped and replaced during a context switch is known as the time slice which are periodically triggered by a hardware interrupt from the system timer. This hardware interrupt provides the system clock in which several interrupts are executed and counted before a context switch is performed.

Correct Answer: A. A. Task control block
Explanation: When a context switch is performed, the current program or task is interrupted, so the processor’s registers are saved in a special table which is known as task control block.

Correct Answer: D. D. Task control block
Explanation: The task control block stores all the task information that the system requires and this is done when the context switch is performed so that the currently running program is interrupted.

Correct Answer: B. B. Ready list
Explanation: The ‘ready’ list possesses all the information regarding a task, that is, all the task and its corresponding status which is used by the scheduler to decide which task should execute in the next time slice.

Correct Answer: A. A. Scheduling algorithm
Explanation: The scheduling algorithm determines the sequence and an associated task’s priority. It also determines the present status of the task.