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Assertion (A): Getting the top-level requirements wrong is the most expensive error in a programme.

Reason (R): Everything downstream is derived from them.

Select the correct answer from the options below.

  • A.A is false but R is true
  • B.Both A and R are true, and R is the correct explanation of A
  • C.Both A and R are true, but R is not the correct explanation of A
  • D.A is true but R is false

Answer: B

Both are true and the second explains the first. A flawed requirement propagates into every system and component, and by the time it is discovered the cost of unwinding it exceeds anything a later technical mistake could produce.

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