CS604 Final Term Solved MCQs with References by Moaaz

CS604- Operating Systems · Solved MCQS · From Final term Papers · July 10,2013 · PSMD01 · Spring 2010

A ________ (or an exception) is a software-generated interrupt caused either by an error (division by zero or invalid memory access) or by a user request for an operating system service.

1. Interrupt
2. Trap (Page 7)
3. Signal
4. Process

Correct answer: Trap (Page 7)

Which register holds the smallest legal physical memory address for a process?

1. Base register (Page 13)
2. Limit register
3. Status register
4. None of the given options

Correct answer: Base register (Page 13)

The process of switching from one process to another is called -----------------

1. context switching (Page 34)
2. scheduling
3. quantum period
4. latency

Correct answer: context switching (Page 34)

The --------------semaphore provides mutual exclusion for accesses to the buffer pool and is initialized to the value 1.

1. mutex (Page 118)
2. binary
3. couting
4. none of the given options

Correct answer: mutex (Page 118)

Binary semaphores are those that have only two values---------

1. 0 and n
2. 0 and 0
3. 0 and 1 (Page 117)
4. None of the given options

Correct answer: 0 and 1 (Page 117)

Addresses generated relative to part of program, not to start of physical memory are

1. Virtual
2. Physical
3. Symbolic

Object files and libraries are combined by a ------------- program to produce the executable binary

1. Compiler
2. Linker
3. Text editor

Physical memory is broken down into fixed-sized blocks, called----------- and Logical memory is divided into blocks of the same size, called -----------

1. Frames, pages (Page 165)
2. Pages, Frames
3. Frames, holes
4. Holes, segments

Correct answer: Frames, pages (Page 165)

A page table needed for keeping track of pages of the page table is called --------------

1. 2-level paging
2. Page directory (Page 173)
3. Page size
4. Page table size

Correct answer: Page directory (Page 173)

The address generated by the CPU, after any indexing or other addressing-mode arithmetic, is called a -------- address, and the address it gets translated to by the MMU is called a ---------address.

1. Hexadecimal, Binary,
2. Valid, invalid
3. Physical, Virtual

Each page is a power of -------- bytes long in paging scheme.

1. 2
2. 3
3. 4 (Page 167)
4. 5

Correct answer: 4 (Page 167)

_______ is a way to establish a connection between the file to be shared and the directory entries of the users who want to have aces to this file.

1. Link (Page 231)
2. Directory
3. Common Group
4. Access Permission

Correct answer: Link (Page 231)

When a _____link is created, a directory entry for the existing file is created

1. Soft
2. Hard (Page 227)
3. Soft or Hard
4. None of the given options

Correct answer: Hard (Page 227)