ISRO2020-1

Question

The immediate addressing mode can be used for

1. Loading internal registers with initial values
2. Perform arithmetic or logical operation on data contained in instructions

Which of the following is true?

• A. Only $1$
• B. Only $2$
• C. Both $1$ and $2$
• D. Immediate mode refers to data in cache

Comments

I think both 1 and 2 are true so c) is corrrect.

Answer 1

$\underline{\textbf{Answer:}\Rightarrow}\;\mathbf{c.}$

Both options are correct.

Example:

$\mathbf{Load \;X_1 \;100}$

Comments

Immediate addressing mode used to Perform arithmetic or logical operation on data contained in instructions

But for 1 point load internal register with initial value any source?

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I think Loading of data is not an Arithmetical or Logical operation. Hence the option A is correct.

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but this is not an ALU operation

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Can it be an example for 2^nd option?

SUB SP, #4

 

Answer 2

Both 1 and 2 are correct for 1 point examples are there for second point example is ADD #2,#3 say this is a instruction it is in immediate mode it will simply add 2+3. It is a 2 address or 2 operand instruction.

Answer 3

C→

Both 1 and 2

 

Both options are correct

1. Loading internal registers with initial values
2. Perform arithmetic or logical operation on data contained in instructions