Classical

Computer Organization Architecture - Machine instructions and addressing modes

26:   Serial input data of 8085 can be loaded into bit 7 of the accumulator by
A. Executing a RIM instruction
B. Execution RST 1
C. Using RESET
D. None of these
 
 

Option: A

Explanation :

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27:   A stack is a
A. 32-bit register in the microprocessor
B. 16-bit register in the microprocessor
C. set of memory locations in R/W memory reserved for storing information temporarily during he execution of a program
D. 16-bit memory address stored in the h program counter
 
 

Option: C

Explanation :

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28:   A device employing INTA line for device interrupt puts the CALL instruction on the data bus while
A. INTA is active
B. HOLD is inactive
C. READY is active
D. None of these
 
 

Option: A

Explanation :

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29:   Which is the most appropriate match for the items in List I with the items in the List II ?
List I
A. Indirect Addressing
B. Indexed Addressing
C. Base Register Addressing

List II
1. Array implementation
2. Writing relocatable code
3. Passing array as parameter

Codes :
A B C
A. 3 1 2
B. 2 3 1
C. 3 2 1
D. 1 2 3
 
 

Option: A

Explanation :

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30:   Both the arithmetic logic unit (ALU) and control section of CPU employ special purpose storage locations called
A. Decoders
B. Buffers
C. Demultiplexer
D. Registers
 
 

Option: D

Explanation :

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