NIELIT 2017 OCT Scientific Assistant A (CS) - Section B: 3

Question

Match list $I$ with List $II$ and select the correct answer using the codes given below the lists.

$${\begin{array}{|c|c|c|}\hline
&\textbf{List I} & & \textbf{List II}\\\hline A.& 0\text{-address instruction} & i.& T=TOP(T-1) \\\hline B.& 1\text{-address instruction} & ii.& Y = Y+X  \\\hline C. & 2\text{-address instruction} & iii.& Y = A-B \\\hline D. & 3\text{-address instruction} & iv.& ACC = ACC-X \\\hline 
\end{array}}$$

$\textbf{Codes:}$

• A. A-i, B-ii, C-iii, D-iv
• B. A-iii, B-ii, C-iv, D-i
• C. A-ii, B-iii, C-i, D-iv
• D. A-i, B-iv, C-ii, D-iii

Comments

option D is correct

Answer 1

• A stack-organized computer does not use an address field for the instructions ADD and MUL. The PUSH and POP instructions, however, need address field to specify the operand that communicates with the stack.
• One-address instructions use an implied accumulator (AC) register for all data manipulation.

after that we can choose option  so ans D