Difficulty: Easy
Correct Answer: A-3, B-1, C-2
Explanation:
Introduction / Context:
Grouping instructions by function speeds up learning a CPU. The 8085 groups—branch, logic, and data transfer—cover control flow, bitwise/compare operations, and memory/register moves.
Given Data / Assumptions:
Concept / Approach:
Map each group to its dominant role in programs and microcode: control flow, logic operations, and data movement.
Step-by-Step Solution:
Verification / Alternative check:
Opcode tables list these mnemonics under their respective sections, confirming the mapping.
Why Other Options Are Wrong:
Common Pitfalls:
Assuming arithmetic (ADD/SUB) belongs in the logic group—some texts separate “arithmetic” and “logical”; here the logic group explicitly includes compare/rotate etc.
Final Answer:
A-3, B-1, C-2
Discussion & Comments