Chapter 35

Question 1

What are share pages

Answer 1

Reentrant (read-only) code pages of a process address space can be shared between processes.

Question 2

What is editor buffer called

Answer 2

Data page

Question 3

What is segmentation

Answer 3

A memory management scheme that supports programmer’s view of memory

Question 4

What is segment

Answer 4

A segment is a logical unit such as procedure, function, method, object, global variable, stack, symbol table. A program is a collection of segment.

Question 5

What is segment table

Answer 5

Maps two dimensional logical addresses to physical addresses.

Question 6

What are 2 tuples of logical address

Answer 6

1. segment number

2. offset

Question 7

What is STBR

Answer 7

Segment-table base register points to the segment table’s location in memory

Question 8

What is STLR

Answer 8

Segment-table length register indicates number of segments used by a program

Question 9

Does sharing can be implemented on code and data level as well. True / False

Answer 9

True

Question 10

What is dynamic storage allocation

Answer 10

Storage for segments has to be allocated dynamically.

Question 11

What are the algorithms for segments allocation in memory

Answer 11

• First-fit
• Best-fit
• Worst-fit

Question 12

Which algorithm for segment allocation gives best performance

Answer 12

First-fit and best-fit

Question 13

Does sharing implements in segmentation the same way as in paging

Answer 13

Yes