Computer organization mcqs addressing modes

 

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Computer organization mcqs addressing modes

Question 1
The instruction, Add #45,R1 does .....
A
Adds the value of 45 to the address of R1 and stores 45 in that address
B
Adds 45 to the value of R1 and stores it in R1
C
Finds the memory location 45 and adds that content to that of R1
D
None of the mentioned
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Question 1 Explanation: 
The instruction is using immediate addressing mode hence the value is stored in the location 45 is added.
Question 2
In the case of, Zero-address instruction method the operands are stored in .....
A
Registers
B
Accumulators
C
Push down stack
D
Cache
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Question 2 Explanation: 
In this case, the operands are implicitly loaded onto the ALU.
Question 3
Add #45, when this instruction is executed the following happen/s .....
A
The processor raises an error and requests for one more operand
B
The value stored in memory location 45 is retrieved and one more operand is requested
C
The value 45 gets added to the value on the stack and is pushed onto the stack
D
None of the mentioned
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Question 4
The addressing mode which makes use of in-direction pointers is .....
A
Indirect addressing mode
B
Index addressing mode
C
Relative addressing mode
D
Offset addressing mode
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Question 4 Explanation: 
In this addressing mode, the value of the register serves as another memory location and hence we use pointers to get the data.
Question 5
In the following indexed addressing mode instruction, MOV 5(R1), LOC the effective address is .....
A
EA = 5+R1
B
EA = R1
C
EA = [R1]
D
EA = 5+[R1]
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Question 5 Explanation: 
This instruction is in Base with offset addressing mode.
There are 5 questions to complete.

 

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