COMPUTER SCIENCE AND ENGINEERING
OPERATING SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bigger parts of a program are loaded when needed by OS
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Smaller parts of a program are loaded when needed by OS
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CPU can only run many program at a time
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CPU can only run one program at a time and OS will switch programs for it
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Detailed explanation-1: -Microsoft Windows 2000, IBM’s OS/390, and Linux are examples of operating systems that can do multitasking (almost all of today’s operating systems can).
Detailed explanation-2: -Single-User/Single-Tasking OS An operating system that allows a single user to perform only one task at a time is called a Single-User Single-Tasking Operating System. Functions like printing a document, downloading images, etc., can be performed only one at a time. Examples include MS-DOS, Palm OS, etc.
Detailed explanation-3: -Types of Multitasking OS Desktop operating systems employ proactive multitasking. Unix was the first OS to implement this multitasking technique. The first versions of Windows to implement preemptive multitasking were Windows NT and Windows 95. The Macintosh gained proactive multitasking in OS X.
Detailed explanation-4: -multitasking: Allows more than one program to run concurrently. multithreading: Allows different parts of a single program to run concurrently.