Operating System Concepts (Exercises and Answers) Part I

Oper at i ngSyst em Concept s( Exer ci sesandAnswer s)Par tI Answers are in blue.

For Exercises 1- 18, mark the answers true and false as foll ows: A. True B. False

1. 2. 3.

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An operating system is an example of application software. software. B An operating system provides a basic user interface that allows the user to use the computer. A A computer can have more than one operating system, but only one O is in control at an y given time. A "ultiprogramming "ultiprogramming is the techni#ue of using multiple $%&s to run programs. B (n the 1)*+s and +s, a human operator would organi-e similar computer obs into batches to be run. A Batch processing implies a high level of interaction between the user and the program. B A timesharing timesharing system allows multiple users to interact with a computer at the same time. A A dumb terminal is an (0O device that connects to a mainframe computer. computer. A A logical address specifies an actual location in main memory. B An address in a single contiguous memory management system is made up of a page and an offset. B (n a fixed partition system, main memory is divided into several partitions of the same si-e. B he bounds register contains the last address of a partition. B (t contains the length of the partition. he first page in a paged memory system is page +. A A process in the running state is currently being executed by the $%&. A he process control bloc %$B4 is a data structure that stores all information about a process. A $%& scheduling determines which programs are in memory. B he first5com, first5served scheduling algorithm is provably optimal. B A time slice is the amount of time each process is given before being preempted in a round robin scheduler. A

For Exercises 19 -! , match the o"eratin# s$stem with information a% out it. A. &ac'( B. )nix *. +inux . '( E. indows

1). 2+. 21. 22. 23.

6hich is the operating system of choice for Apple $omputers7 A 8istorically, which is the operating system of choice for serious programmers7 B 6hich is the %$ version of &nix7 $ 6hat is the "icrosoft operating system family provided on %$s called7 9 6hat is the original %$ operating system called7 :

For Exercise  - /, match the followin# software t$"e with i ts definition. A. ($stems software B. '"eratin# s$stem *. A""lication software

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%rograms that help us solve real5world problems. $ %rograms that manage a computer system and interact with hardware. A %rograms that manage computer resources and provide an interfaces for other programs. B

Exercises 0 - 0 are "ro%lems or short answer uestions.

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32.

:istinguish between application software and system software. ystems software are tools to help others write programs; they manage a computer system and interact with hardware. Application software are programs to solve specific problems. 6hat is an operating system7 An operating system is a piece of software that manages a computer