Operating Systems Concepts – Section 3

6. Which of the following is not true about the memory management?

A. virtual memory is used only in multi-user systems
B. segmentation suffers from external fragmentation
C. paging suffers from internal fragmentation
D. segmented memory can be paged
E. None of the above

Correct Answer: A. virtual memory is used only in multi-user systems

7. Job Control Language (JCL) statements are used to

A. Read the input from the slow-speed card reader to the high-speed magnetic disk
B. Specify, to the operating system, the beginning and end of a job in a batch
C. Allocate the CPU to a job
D. All of the above
E. None of the above

Correct Answer: B. Specify, to the operating system, the beginning and end of a job in a batch

8. Paging

A. is a method of memory allocation by which the program is subdivided into equal portions, or pages and core
is subdivided into equal portions or blocks.
B. consists of those addresses that may be generated by a processor during execution of a computation.
C. is a method of allocating processor time.
D. allows multiple programs to reside in separate areas of core at the time.
E. None of the above

Correct Answer: A. is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.

9. Which of the following is not true about documentation?

A. Documentation, of a system, should be as clear and direct as possible
B. Documentation increases the maintenance time and cost
C. Documentation gives better understanding of the problem
D. All of the above
E. None of the above

Correct Answer: B. Documentation increases the maintenance time and cost

10. The system/370 assembler language

A. allows the programmer to write base registers and displacements explicitly in the source program.
B. is used to remember which of the general-purpose registers are currently available as base registers, and
what base addresses they contain.
C. allows multiple programs to reside in separate areas of core at the same time.
D. is a term that refers to the control programs of an operating system.
E. None of the above

Correct Answer: A. allows the programmer to write base registers and displacements explicitly in the source program.

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