Why branching controls program execution in ARM Architecture - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to show the instruction that causes a branch in ARM assembly.

ARM Architecture

B [1]

Drag options to blanks, or click blank then click option'

AMOV

BSUB

CADD

Dlabel

Attempts:

3 left

💡 Hint

Common Mistakes

Using MOV, ADD, or SUB instead of a label after B.

Confusing branch instructions with data movement instructions.

In ARM assembly, the B instruction is used to branch to a label, which changes the flow of execution.

2fill in blank

medium

Complete the code to branch if zero flag is set in ARM assembly.

ARM Architecture

BEQ [1]

Drag options to blanks, or click blank then click option'

AADD

BMOV

Czero_label

DSUB

Attempts:

3 left

💡 Hint

Common Mistakes

Using instructions like MOV or ADD instead of a label after BEQ.

Not understanding that BEQ requires a label to branch to.

The BEQ instruction branches to the given label if the zero flag is set, indicating equality.

3fill in blank

hard

Fix the error in the branch instruction to correctly jump to the label.

ARM Architecture

B [1]

Drag options to blanks, or click blank then click option'

Aloop_start

BMOV

C1234

DADD

Attempts:

3 left

💡 Hint

Common Mistakes

Using numeric values instead of labels after B.

Confusing instructions with labels.

The branch instruction must be followed by a valid label name, not a number or instruction.

4fill in blank

hard

Fill both blanks to create a conditional branch that jumps if not equal.

ARM Architecture

B[1] [2]

Drag options to blanks, or click blank then click option'

ANE

Bequal_label

Cnot_equal_label

DEQ

Attempts:

3 left

💡 Hint

Common Mistakes

Using EQ condition with a not equal label.

Mixing condition codes and labels incorrectly.

The BNE instruction branches if the zero flag is clear, meaning not equal. It must be followed by the target label.

5fill in blank

hard

Fill all three blanks to create a branch with link instruction to a function label.

ARM Architecture

BL [1] [2] [3]

Drag options to blanks, or click blank then click option'

ASUB

Bfunction_label

CADD

DMOV

Attempts:

3 left

💡 Hint

Common Mistakes

Adding instructions after BL that are not labels.

Misunderstanding BL usage as multiple arguments.

The BL instruction branches to a function label and saves the return address. The following tokens are invalid here, so only the label is correct; the other blanks are distractors to fill.