Computer Science Assignment 2 1

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Assignment 2

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Unit Code and Name

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Chapter 3 Exercise Questions

1. Name and describe the different states that a process can exist in at any given time.

A process can exist in one of the following states at any given time during its execution.

New, ready, ready-suspended, running, blocked, blocked-suspended, or terminated. A Process is

in a new state when created. The process enters a ready state waiting to be assigned a processor by

a short-term scheduler. The process in a ready state can be suspended from the main memory due

to lack of memory and gets placed in secondary memory in a ready-suspended state. The process

is in a running state if it has been assigned a processor, blocked if it’s waiting for some event to

occur such as an I/O event, and blocked-suspended if it gets placed in a secondary memory when

it was initially in a blocked state. The process terminates and gets out the main memory.

2. Explain the difference between an I/O-bound process and a CPU-bound process.

An I/O-bound process differs from a CPU-bound in that the process execution delay arises

from an I/O event such as a disk read/write or a network read/write. In a CPU-bound arise from a

lot of processes taking much of the CPU time and resources.

3. Describe the actions taken by a kernel to context-switch between processes.

Context-switch initiated by an interrupt. The OS must save the instruction pointer and the

stack point of the process in execution. The OS saves other registers and other machine states. A

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1 Assignment 2 Name Unit Code and Name Instructor’s Name Institution’s Affiliation Date 2 Chapter 3 Exercise Questions 1. Name and describe the different states that a process can exist in at any given time. A process can exist in one of the following states at any given time during its execution. New, ready, ready-suspended, running, blocked, blocked-suspended, or terminated. A Process is in a new state when created. The process enters a ready state waiting to be assigned a processor by a short-term scheduler. The process in a ready state can be suspended from the main memory due to lack of memory and gets placed in secondary memory in a ready-suspended state. The process is in a running state if it has been assigned a processor, blocked if it’s waiting for some event to occur such as an I/O event, and blocked-suspended if it gets placed in a secondary memory when it was initially in a blocked state. The process terminates and gets out the main memory. 2. Explain the difference between an I/O-bound process and a CPU-bound process. An I/O-bound process differs from a CPU-bound in that the process execution delay arises from an I/O event such as a disk read/write or a network read/write. In a CPU-bound arise from a lot of processes taking much of the CPU time and resources. 3. Describe the actions taken by a kernel to context-switch between processes. Context-switch initiated by an interrupt. The OS must save the instruction pointer and the stack point of the pro ...
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