Given the following state transition table. Which of the test cases below will cover the following series of state transitions?

Question

Exhibit

Options

• AD, A, B, C.
• BA, B, C, D.
• CD, A, B.
• DA, B, C.

• A
  84% (36)
• B
  9% (4)
• C
  2% (1)
• D
  5% (2)

Explanation

Option A (D, A, B, C) is correct because it follows the exact sequence of state transitions required - starting at state D and progressing through A, B, and C in the correct order, covering every transition in the series without skipping or reordering any step.

Why the distractors fail:

• B (A, B, C, D) starts at state A instead of D, meaning it enters the sequence at the wrong point and ends at D rather than passing through it first - the order is entirely wrong.
• C (D, A, B) starts correctly at D but is incomplete; it stops at B and never reaches state C, leaving the final required transition uncovered.
• D (A, B, C) skips state D altogether and begins at A, missing the mandatory starting transition entirely.

Memory tip: In state transition questions, treat the required series like a street address - the order and starting point both matter. Eliminate any option that begins in the wrong state or ends too early, and you'll quickly isolate the one path that walks all the way through.

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