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Welcome to the Computer Architecture MCQs Page

Dive deep into the fascinating world of Computer Architecture with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Computer Architecture, a crucial aspect of UGC CBSE NET Exam. In this section, you will encounter a diverse range of MCQs that cover various aspects of Computer Architecture, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within UGC CBSE NET Exam.

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Check out the MCQs below to embark on an enriching journey through Computer Architecture. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of UGC CBSE NET Exam.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Computer Architecture. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Computer Architecture MCQs | Page 2 of 16

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Q11.
Serial access memories are useful in applications where

a.

Data consists of numbers

b.

Short access time is required

c.

Each stored word is processed differently

d.

None of these

Discuss
Answer: (d).None of these
Q12.
The essential difference between traps and interrupts is

a.

traps are synchronous and  interrupts are synchronous with the program

b.

traps are synchronous and  interrupts are asynchronous with the program

c.

traps are synchronous and  interrupts are asynchronous with the I/O devices

d.

None of these

Discuss
Answer: (b).traps are synchronous and  interrupts are asynchronous with the program
Q13.
The size of the ROM required to build an 8-bit adder/subtractor with mode control, carry input, carry output and two's complement overflow output is given as

a.

2^16 x 8

b.

2^18 x 10

c.

2^16 x 10

d.

2^18 x 8

Discuss
Answer: (b).2^18 x 10
Q14.
A specific editor has 200 K of program text, 15 K of initial stack, 50 K of initialized data, and 70 K of bootstrap code. If five editors are started simultaneously, how much physical memory is needed if shared text is used?

a.

1135 K

b.

335 K

c.

1065 K

d.

320 K

Discuss
Answer: (c).1065 K
Q15.
A hierarchical memory system that uses cache memory has cache access time of 50 nano seconds, main memory access time of 300 nano seconds, 75% of memory requests are for read, hit ratio of 0.8 for read access and the write-through scheme is used. What will be the average access time of the system both for read and write requests ?

a.

157.5 n.sec

b.

110 n.sec

c.

75 n.sec

d.

82.5 n.sec

Discuss
Answer: (a).157.5 n.sec
Q16.
For switching from a CPU user mode to the supervisor mode following type of interrupt is most appropriate

a.

Internal interrupts

b.

External interrupts

c.

Software interrupts

d.

None of the above

Discuss
Answer: (a).Internal interrupts
Q17.
In a dot matrix printer the time to print a character is 6 m:sec., time to space in between characters is 2 m.sec., and the number of characters ina line are 200. The printing speed of the dot matrix printer in characters per second and the time to print a character line are given by which of the following options?

a.

125 chars/second and 0.8 seconds

b.

250 chars/second and 0.6 seconds

c.

166 chars/second and 0.8 seconds

d.

250 chars/second and 0.4 seconds

Discuss
Answer: (c).166 chars/second and 0.8 seconds
Q18.
Match the following 8085 instructions with the flags:
 
a. XCHG i. only carry flag is affected.

b. SUB ii.  no flags are affected.

c. STC iii. all flags other than carry flag are affected.

d. DCR iv. all flags are affected.

code:
a  b  c   d

a.

iv  i   iii  ii

b.

iii  ii   i  iv

c.

ii  iii   i  iv

d.

ii  iv   i  iii

Discuss
Answer: (d).ii  iv   i  iii
Q19.
How many times will the following loop be executed?

          LXI    B, 0007 H
LOP: DCX  B 
          MOV  A,B
          ORA  C
          JNZ   LOP

a.

05

b.

07

c.

09

d.

00

Discuss
Answer: (b).07
Q20.
Specify the contents of the accumulator and the status of the S, Z and CY flags when 8085 microprocessor performs addition of 87 H and 79 H.

a.

11, 1 ,1 ,1

b.

10, 0 ,1 ,0

c.

01, 1, 0, 0

d.

00, 0, 1, 1

Discuss
Answer: (d).00, 0, 1, 1
Page 2 of 16

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