If tasks A, B, and C must be completed before task D, which of the following is

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Question: If tasks A, B, and C must be completed before task D, which of the following is an invalid sequence?

Options:

Correct Answer: C, A, D, B

Solution:

C, A, D, B is invalid as D cannot start before A and B are completed.

If tasks A, B, and C must be completed before task D, which of the following is an invalid sequence?

If tasks A, B, and C must be completed before task D, which of the following is an invalid sequence?

Step 1: Identify the tasks that must be completed before task D. These are tasks A, B, and C.
Step 2: Understand that task D cannot start until all of A, B, and C are finished.
Step 3: Look at the sequence C, A, D, B.
Step 4: Notice that in this sequence, task D is placed after task C and A, but before task B.
Step 5: Since task D is listed before task B, and B must be completed before D can start, this sequence is invalid.
Step 6: Conclude that the sequence C, A, D, B is not allowed because D cannot start before B is completed.

Task Dependency – Understanding the order in which tasks must be completed based on their dependencies.
Sequence Validation – Identifying valid and invalid sequences based on prerequisite tasks.