Test: Multitasking Operating Systems - Computer Science Engineering (CSE) MCQ

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.

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.

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

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.

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.

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.

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.

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.

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

Explanation: The kernel can control the memory usage and it can also prevent the tasks from corrupting each other.

Explanation: The kernel can control memory sharing between tasks which allow sharing common program modules.

Explanation: The kernel can implement the message passing and control which acts as a message passer and controller between the tasks.

Explanation: There are two basic types of messages associated with the real-time operating system. These are semaphores and messages.

Explanation: The messages can carry information and it can also control the task regarding the real-time operating systems. These are also known as events.

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.