Memory Management

Question 1

What do you understand by the term Memory Management?

Answer 1

This is the functionality of OS that handles and manages the primary memory and moves processes back and forth between the main memory and disk during execution

Question 2

Define the phrase Project Address Space?

Answer 2

Process Address Space is the set of all the logical addresses that a process reference in its code

Question 3

Another Name for a Project Address Space?

Answer 3

Logical Address Space

Question 4

How many types of addresses are used before and after memory allocation?
Mention them?

Answer 4

Three!!!

1.Symbolic addresses 2.Relative addresses 3.Physical addresses

Question 5

What is that very important CPU Scheduling benefit?

Answer 5

it allow for improve CPU utilization and increase in speed of computer response to users

Question 6

What comes to your mind when you hear ;
Variable names
Constants
Instruction Labels

Answer 6

Symbolic Addresses

Question 7

During compilation Symbolic address is converted into

_____________?

Answer 7

Relative Address

Question 8

What Address is generated by the loader when it is loaded into the Main Memory?

Answer 8

Physical Address

Question 9

Binding of symbolic addresses to Physical Addresses
occurs when;
a) During execution b) Compilation c) Loading d) All of the option

Answer 9

D) All of the options

Question 10

State the difference between Static and Dynamic Loading?

Answer 10

Static Loading ; Every (Absolute Program) data is loaded into the Main Memory for the for the execution to start
While
Dynamic Loading ; dynamic routine of library are stored on a disk in relocatable form so they are loaded when they are needed

Question 11

What is Swapping

Answer 11

this is the mechanisms in which a process can be swapped temporarily out of the main memory into the secondary memory and make the memory available for other process

Question 12

What is another name for Swapping

Answer 12

Memory Compaction

Question 13

Swapping allows for multiplexing or multiprogramming

True or False

Answer 13

True

Question 14

What is that one thing Swapping cause

Answer 14

it affects performance

Question 15

Mention the types of Memory partition and what they are used for

Answer 15

Low Memory - where the OS is stored

High Memory - where the user processes are stored

Question 16

How Many types of memory allocation techniques do OS use

Mention them and state their differences

Answer 16

Single partition allocation (1 partition for all process uses RRS)
Multiple partition allocation( Divided into smaller partition to hold a process each)

Question 17

What is full meaning of RRS and what is it important in single partition allocation

Answer 17

since all the process are loaded in a single memory there is a need for the protecting of one process from the other to avoid overwritten this is where the RRS comes in

Question 18

What is the the problem most OS management seek to solve?

define it

Answer 18

Fragmentation
this is when processes cannot be assigned to Memory blocks because of the blocks size( usually the memory is split into smaller size

Question 19

Differences between External and Internal Fragmentati

Answer 19

External fragmentation– Here the fragment when combined (in total) is enough for a process each fragment on it own can’t handle the process and the are connected(contiguous)
solved by compaction technique (Swapping)

Internal fragmentation; Here too much space is assigned to a process living the other space useless to the remaining procedd