Solution Manual for Your UNIX Linux The Ultimate Guide 3rd Edition by Sumitabha Das

Solution Manual for Your UNIX Linux The Ultimate Guide 3rd Edition by Sumitabha Das

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1 Your UNIX: The Ultimate Guide—Solutions to Exercises Solutions To Exercises Chapter 1 1.1 The operating system (OS) allocates the CPU, memory and registers to be used by programs in execution. It also offers a set of programs as additional services for performing routine functions like file copying, directory removal and so forth. 1.2 It makes a call to the operating system to do the job on its behalf. 1.3 No, when a program needs to perform an operation that doesn’t need the services of the CPU (like doing a disk I/O operation), the process representing the program vacates the CPU while the operation is in progress. 1.4 Multiprogramming means that multiple programs can be concurrently present in memory. Multiuser operation implies that these multiple programs can be run by multiple users. Multitasking means that a single user can also run multiple programs. 1.5 UNIX design allows commands to be interconnected so one command takes input from another. This is possible only if the commands are noninteractive. Header information of one command has no meaning for
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