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SarkariResultOutAdditional Assistant Engineer (Electrical) · 2026

Previous Year Question

Identify the correct instruction type of 'CJNE A, #25H, NEXT' in an 8051 microcontroller.
  1. Data transfer instruction
  2. Logical instruction
  3. Conditional jump instruction
  4. Arithmetic instruction

Correct answer: C

Explanation

CJNE means Compare and Jump if Not Equal. It compares the accumulator with the immediate value and branches to NEXT when they are unequal, so it is a conditional jump instruction.

Step-by-step solution

CJNE Instruction explanatory diagram

Correct Answer

C — Conditional jump instruction

Explanation

CJNE means Compare and Jump if Not Equal. It compares the accumulator with the immediate value and branches to NEXT when they are unequal, so it is a conditional jump instruction.

Key Concept

CJNE Instruction

Exam Point

CJNE = Compare + Jump if Not Equal.

Exam tip

CJNE = Compare + Jump if Not Equal.

Quick method

CJNE = Compare + Jump if Not Equal.