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Given the tasks A, B, C, D, and E, if A and B must be done before C, and C must

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Question: Given the tasks A, B, C, D, and E, if A and B must be done before C, and C must be done before D, which of the following is a possible order of completion?

Options:

  1. B, A, C, D, E
  2. C, A, B, D, E
  3. A, C, B, D, E
  4. D, C, A, B, E

Correct Answer: B, A, C, D, E

Solution: 

The order B, A, C, D, E satisfies the conditions that A and B are before C, and C is before D.

Given the tasks A, B, C, D, and E, if A and B must be done before C, and C must

Practice Questions

Q1
Given the tasks A, B, C, D, and E, if A and B must be done before C, and C must be done before D, which of the following is a possible order of completion?
  1. B, A, C, D, E
  2. C, A, B, D, E
  3. A, C, B, D, E
  4. D, C, A, B, E

Questions & Step-by-Step Solutions

Given the tasks A, B, C, D, and E, if A and B must be done before C, and C must be done before D, which of the following is a possible order of completion?
  • Step 1: Identify the tasks: A, B, C, D, and E.
  • Step 2: Understand the conditions: A and B must be completed before C, and C must be completed before D.
  • Step 3: List the tasks that must come before C: A and B.
  • Step 4: List the tasks that must come before D: C.
  • Step 5: Determine a possible order: Start with A and B since they must be done before C.
  • Step 6: After A and B, place C next in the order since it must come after A and B.
  • Step 7: After C, place D since it must come after C.
  • Step 8: Finally, place E at the end since it has no restrictions.
  • Task Dependency – Understanding the order in which tasks must be completed based on given prerequisites.
  • Topological Sorting – Applying principles of topological sorting to determine a valid sequence of tasks.
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