Question 21 : PSW is saved in stack when there is a _____
1. Interrupt recognized
2. Execution of RST instruction
3. Execution of CALL instruction
4. All of these
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Question 22 : The multiplicand register & multiplier register of a hardware circuit implementing booth's algorithm have (11101) & (1100). The result shall be ______
1. (812)10
2. (-12)10
3. (12)10
4. (-812)10
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Question 23 : The circuit converting binary data in to decimal is_____
1. Encoder
2. Multiplexer
3. Decoder
4. Code converter
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Question 24 : A three input NOR gate gives logic high output only when_____
1. One input is high
2. One input is low
3. Two input are low
4. All input are high
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Question 25 : N bits in operation code imply that there are ___________ possible distinctOperators.
1. 2n
2. 2n
3. n/2
4. n2
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Question 26 : _________ register keeps tracks of the instructions stored in program stored in memory.
1. AR (Address Register)
2. XR (Index Register)
3. PC (Program Counter)
4. AC (Accumulator)
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Question 27 : Memory unit accessed by content is called______
1. Read only memory
2. Programmable Memory
3. Virtual Memory
4. Associative Memory
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Question 28 : 'Aging registers' are _______
1. Counters which indicate how long ago their associated pages have been Referenced.
2. Registers which keep track of when the program was last accessed
3. Counters to keep track of last accessed instruction
4. Counters to keep track of the latest data structures referred
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Question 29 : The instruction 'ORG O' is a______
1. Machine Instruction
2. Pseudo instruction
3. High level instruction
4. Memory instruction
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Question 30 : Translation from symbolic program into Binary is done in__________
1. Two passes
2. Directly
3. Three passes
4. Four passes
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