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1.1 What is an Operating System (OS)? 1.2 What are three objectives of an OS design? 1.3 List and briefly define the four main elements of a computer.

1.1 What is an Operating System (OS)? 1.2 What are three objectives of an OS design? 1.3 List and briefly define the four main elements of a computer.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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1.1 What is an Operating System (OS)? 1.2 What are three objectives of an OS design? 1.3 List and briefly define the four main elements of a computer. 1.4 With the aid of a diagram, describe a five-state model. 1.5 Why are two modes (user and kernel) needed? 1.6 It was pointed out that two advantages of using multiple threads within a process are that (1) less work is involved in creating a new thread within an existing process than in creating a new process, and (2) communication among threads within the same process is simplified. Is it also the case that a mode switch between two threads within the same process involves less work than a mode switch between two threads in different processes? Why?
Transcribed Image Text:1.1 What is an Operating System (OS)? 1.2 What are three objectives of an OS design? 1.3 List and briefly define the four main elements of a computer. 1.4 With the aid of a diagram, describe a five-state model. 1.5 Why are two modes (user and kernel) needed? 1.6 It was pointed out that two advantages of using multiple threads within a process are that (1) less work is involved in creating a new thread within an existing process than in creating a new process, and (2) communication among threads within the same process is simplified. Is it also the case that a mode switch between two threads within the same process involves less work than a mode switch between two threads in different processes? Why?
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