[Solved] Identify the error in this ARM assembly code snippet:B 100 MOV r0, #10 100: MOV r1, #20 — Ans: Label '100' is invalid because it starts with a number. | ARM Architecture

ARM Architecture - Control Flow Instructions

Identify the error in this ARM assembly code snippet:

B 100
MOV r0, #10
100:
MOV r1, #20

AMOV instructions cannot use immediate values.

BThe branch instruction must be 'BR' instead of 'B'.

CThere is no error; the code is correct.

DLabel '100' is invalid because it starts with a number.

Step-by-Step Solution

Solution:

Step 1: Check label naming rules
Labels in ARM assembly cannot start with a digit; '100' is invalid.
Step 2: Verify branch and MOV syntax
The branch instruction 'B' is correct, and MOV can use immediate values like #10.
Final Answer:
Label '100' is invalid because it starts with a number. -> Option D
Quick Check:
Labels cannot start with digits [OK]

Quick Trick: Labels must start with a letter, not a number [OK]

Common Mistakes:

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