operating system set 4 Detailed Explanation And More Example

Question : 1

Which combination of the following features will suffice to characterize an OS as a multi programmed OS ? (i) More than one program may be loaded into main memory at the same time for execution. (ii) If a program waits for certain events such as I/O, another program is immediately scheduled for execution. (iii) If the execution of a program terminates, another program is immediately scheduled for execution.

a) (i) only

b) (ii) and (iii)

c) (i) and (iii)

d) (i), (ii) and (iii).

Question : 2

The main memory of the computer

a) Controls the operations of computer.

b) Performs data processing functions.

c) Stores data and programs.

d) None of these.

Question : 3

• Statement A:
• The placement policy determines where in real memory a process piece is to reside.
• Statement B:
• The fetch policy determines when a page should be bought into main memory.

a) A and B both true

b) A and B both false

c) A is true, B is false

d) A is false, B is true

Question : 4

Processor in computer

a) Controls the operations of the computer/ processes data functions.

b) Stores data and program.

c) Moves data between computer and its external environment.

d) None of these.

Question : 5

The memory allocation scheme subject to external fragmentation is

a) segmentation

b) swapping

c) pure demand paging

d) multiple contiguous fixed partitions

Question : 6

The principal function of a process is

a) To execute machine instructions residing in main memory.

b) To execute assembly instructions residing outside main memory.

c) A and B both true.

d) A and B both false.