Computer Science - Computer Systems Architecture
Exam Duration: 45 Mins Total Questions : 30
Zero has one representation in
- (a)
sign magnitude
- (b)
1's complement
- (c)
2's complement
- (d)
None of these
Which of the following is not an advantage of both alogorithm?
(i) Booth's algorithm handlles both positive and negative multipliers uniformly
(2) Booth's algorithm achieves same efficiency in the number of additions required when the multiplier has a few larger block of 1's.
(3) The speed of doing multiplication by booth's algorithm is more than the normal algorithm of average.
- (a)
2, 1
- (b)
3
- (c)
2, 3
- (d)
1, 2, 3
Control cicuit designed by .... tends to have a random structure
- (a)
a stable table method
- (b)
delay element method
- (c)
sequence counter method
- (d)
None of these
Which of the following instructions requires 1-address space?
- (a)
2050
- (b)
LDA 2010
- (c)
MOV 05
- (d)
1 NRA
The number of references required for CPU to execute direc mode address reference is
- (a)
0
- (b)
1
- (c)
2
- (d)
3
The addressing mode used in the instruction PUSH B is
- (a)
direct
- (b)
register
- (c)
register indirect
- (d)
immediate
The correct matching for following pair is
| a. DMA I/O | 1. High speed DMA |
| b. Cache | 2. Disk |
| c. Interrupt | 3. Printer |
| d. Condition code register | 4. ALU |
- (a)
a-4, b-3, c-1, d-2
- (b)
a-2, b-1, c-3, d-4
- (c)
a-4, b-3, c-2, d-1
- (d)
a-2, b-3, c-4, d-1
Comparing the time T1 taken for a single instruction on a pipelined CPU with time T2 taken on a non-pipelined but identical CPU, we can say that
- (a)
\({ T }_{ 1 }\le { T }_{ 2 }\)
- (b)
\({ T }_{ 1 }\ge { T }_{ 2 }\)
- (c)
\({ T }_{ 1 }<{ T }_{ 2 }\)
- (d)
\({ T }_{ 1 }{ isT }_{ 2 }\) plus line taken for one instruction fetch cycle
The performance of a pipelined processor suffers if
- (a)
the pipeline stages have different delays
- (b)
consecutive instructions are dependent on each other
- (c)
the pipeline stages share hardware resources
- (d)
All of the above
A non-pipeline system takes 40 ns to process a task. The same task can be processed in a 6-segment pipeline with a clock cycle of 10s. Determine the sped up ratio of the pipeline for 100 tasks.
- (a)
4.8
- (b)
5.1
- (c)
4.76
- (d)
None of these
Consider a 4-way set associative cache consisting of 128 lines with a line size of 64 words. The CPU generates a 20-bit address of a word in main memory. The number of bits in the TAG, LINE and word fields are respectively.
- (a)
7, 7, 6
- (b)
9, 6, 5
- (c)
7, 5m 8
- (d)
9, 5, 8
The address of 1039th sector is
- (a)
<0, 15, 31>
- (b)
<0, 10, 30>
- (c)
<0, 16, 31>
- (d)
<0, 17, 31>
Consider the folloing statements:
S1 : 2 words with the same index in their address bus with different tag values cannot reside in cache at the same time direct mapping strategy.
S2 : The fastest and most flexible cache organization uses associative memory.
Which of the following is true?
- (a)
S1
- (b)
S2
- (c)
S1 and S2
- (d)
None of these
Which of the following statementsis incorrect about Program Counter (PC)?
I. PC does not affect instruction sequencing.
II. During branchu operation, prgram counter points to the memory from which instruction is to be fetched and executed.
III. The program counter contents are used as address and instruction is read from memory.
- (a)
I only
- (b)
II only
- (c)
Both I and II
- (d)
Neither I nor II
Which of the following is the internal memroy of system?
- (a)
CPU register
- (b)
Cache
- (c)
Main memory
- (d)
All of these
The register which contains the instruction to the executed is called
- (a)
instructions register
- (b)
memory address register (MAR)
- (c)
index register
- (d)
memory data register (MDR)
A cache memory needs an access time of 20 ns and main memry 120 ns, what is the average access time of CPU (assume hit ratio= 80%)?
- (a)
30 ns
- (b)
44 ns
- (c)
35 ns
- (d)
45 ns
A tabulating machine invented by Herman Hollerith was called ----------
- (a)
Herman Tabulating Machine
- (b)
Simple Tabulating Machine
- (c)
Punched Card Machine
- (d)
Hollerith Tabulating Machine
Which is a computing device that works on continuous range of values?
- (a)
Digital computer
- (b)
Hybrid computer
- (c)
Analog computer
- (d)
Hardware
Desktop computers are also known as________
- (a)
home computer
- (b)
laptop computer
- (c)
mini computer
- (d)
micro computer
UNIVAC stand for ......
- (a)
Universal Automatic Computer
- (b)
Universal Auto Call
- (c)
Universal Automobile Computer
- (d)
Universal Automatic Computer
Which unit of the computer executes program instructions, performs calculations and makes decisions?
- (a)
Input
- (b)
ALU
- (c)
Output
- (d)
CPU
Which one of the following is a non-physical entities of a computer?
- (a)
Data
- (b)
Software
- (c)
Hardware
- (d)
Programs
Which unit of CPU coordinates the action of the entire system?
- (a)
ALU
- (b)
Memory unit
- (c)
control unit
- (d)
input unit
The performance of a memory system is defined by.............different measures
- (a)
2
- (b)
4
- (c)
8
- (d)
16
The CPU is controlled by.....................instructions
- (a)
hardware
- (b)
software
- (c)
data
- (d)
memory
Which input device allows an image or text as a input to a computer?
- (a)
BCR
- (b)
OCR
- (c)
Mouse
- (d)
Scanner
The smallest dot that can be displayed is called...........
- (a)
Picture
- (b)
Pixel
- (c)
Icons
- (d)
resolution
A line printer can print...........lines per minute.
- (a)
100 to 1500
- (b)
150 to 2500
- (c)
150 to 3000
- (d)
1 to 3000
Which one of the following is a voice output device?
- (a)
Microphone
- (b)
Speakers
- (c)
Light pen
- (d)
Magnetic Reader
