Computer Arithmetic Questions And Answers - Page 6

Computer Arithmetic  multiple choice and objective type questions and answers along with Explanations.
1) The .... is ultraviolet light erasable and electricity programmable.This allows the user to create and store until programs and data are perfected. ?

1. EPROM
2. PROM
3. ROM
4. RAM

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Answer = A 
Explanation: N/A

2)  What table shows the electrical status of digital circuits output for every possible combination of electrical states in the inputs ?

1. Function Table
2. Truth Table
3. Routing Table
4. ASCII Table

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Answer = A 
Explanation: No Explanation

3) The gray code for decimal 7 is ?

1. 0111
2. 1011
3. 0100
4. 0101

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Answer = C
Explanation: First convert decimal seven to binary that is 0111 then convert it into gray code.

4) Which of the following  electronic component are not found in ordinary ICs?

1. Diodes
2. Transistors
3. Resistors
4. Inductors

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Answer = D 
Explanation: Inductor is a passive two terminal electronic component that stores energy in its magnetic field

5) Choose the correct statements ?

1. Bus is a group of information carrying wires
2. Bus is needed to achieve reasonable speed of operation
3. Bus can carry data or address
4. A bus can be shared by more that one device
5. All of above

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Answer = E
Explanation: A bus have all the four features.

6) If the memory access takes 20 ns with cache and 110 ns without it,then the hit ratio (cache uses 10 as memory) is  ?

1. 93 %
2. 90 %
3. 87 %
4. 88 %

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Answer = B
 Explanation:  If we find what we want in the cache then it is called Hit otherwise it is miss.

7)  Any instruction should have at least ?

1. 2 operands
2. 1 operand
3. 3 operands
4. None of above

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Answer = D 
Explanation: An instruction can be without operand also.

8) The number of clock cycles necessary to complete 1 fetch cycle in 8085 is ?

1. 3 or 4
2. 4 or 5
3. 4 or 6
4. 3 or 5

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Answer = C 
Explanation: No Explanation

9) Motorola's 68040 is comparable to ?

1. 8085
2. 80286
3. 80386
4. 80486

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Answer = D
Explanation: Motorola 68040 is a microprocessor released in 1970. It is called as oh - four - oh  or  oh forty

10) The addressing mode used in the instruction PUSH B ?

1. Direct
2. Register
3. Register Indirect
4. Immediate

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Answer = C
Explanation:In register indirect addressing mode the operand is found from the memory whose address is fetched from the register in the instruction code.

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