Computer Science Quiz

Divide 150 by 6 in BCD format. what is the quotient in BCD?

• 0010 0101

• 0001 0011

• 0001 0101

• 0010 0000

Two floating-point numbers are given in normalized format: X= 1.101 x 2³ Y= 1.011 x 2² Perform the addition X + Y and represent the result in normalized form.

• 1.00101 × 2⁴

• 1.00101 × 27

• 1.00101 × 25

• 1.00101 × 23

Two floating-point numbers are given in normalized format: X= 1.110 x 2⁴ Y= 1.001 x 2³ Perform the subtraction X - Y and represent the result in normalized form.

• 1.0000 × 2⁴

• 1.0011 × 2⁴

• 1.00101 × 25

• 1.011 × 23

In a pipelined processor, suppose the instruction latency for each pipeline stages in as follows: IF=2ns, ID=3ns, EX=4ns, MEM=5ns, and WB=1ns.what is the total latency for executing a single instruction through the pipeline ?

• 15 ns

• 1 ns

• 10 ns

• 15ns

In pipelined processor, branch instruction can cause control hazards.Suppose a branch instruction is resolved at end of ID stage, which takes 1 cycle.If a branch is taken, how many institutions following the branch will be incorrectly fetched and need to be flushed from the pipeline?

• 1

• 0

• 2

• 16

A graphics card has on board memory of 1 Mbyte. Which of the following modes can the card not support?

• 1600 x 400 resolution with 256 colors on a 17 inch monitor ;

• 1600 x 400 resolution with 16 million colors on a 14 inch monitor;

• 800 x 400 resolution with 16 million colors on a 17 inch monitor;

• 800 x 800 resolution with 256 colors on a 14 inch monitor;

Which of the following requires a device driver?

• Register

• Cache

• Main memory

• Disc

You have a decimal number, 56, that needs to be represented in octal format. Suppose this value represents the ID of a node in a computer network that only uses base-8 identifiers for compatibility reasons. How would you convert it.

• 80

• 70

• 07

• 08

How many 32 k × 1 RAM chips are needed to provide a memory capacity of 256 Kbyte

• 8

• 32

• 64

• 128

A RAM chip has a capacity of 1024 words of 8 bits each (1K×8). The number of 2×4 decoders with enable line needed to construct a 16K ×16 RAM from 1K×8 RAM is

• 4

• 5

• 6

• 7