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You want to repeat a block of instructions 5 times using ARM assembly. Which branching method best achieves this?

hard📝 Application Q15 of 15
ARM Architecture - Control Flow Instructions
You want to repeat a block of instructions 5 times using ARM assembly. Which branching method best achieves this?
AUse multiple unconditional branches to skip instructions
BUse an unconditional branch to jump forward once
CUse a conditional branch that loops until a counter reaches zero
DUse a branch that only executes once
Step-by-Step Solution
Solution:

  1. Step 1: Understand looping with branching

    To repeat instructions multiple times, a loop is needed that checks a counter and branches back if not done.

  2. Step 2: Identify correct branch type for looping

    A conditional branch that tests the counter and loops until it reaches zero is the correct method.

  3. Final Answer:

    Use a conditional branch that loops until a counter reaches zero -> Option C

  4. Quick Check:

    Looping requires conditional branch with counter check [OK]
Quick Trick: Loop with conditional branch and counter check [OK]
Common Mistakes:
  • Using unconditional branch without loop control
  • Skipping instructions instead of looping
  • Assuming branch executes multiple times automatically

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