Directions: Each question or group of questions is based on a passage, graph, table, or set of conditions. In answering some of the questions, it may be useful to draw a rough diagram. For each question, select the best answer choice given.
Questions 1-4
Each of six automated tasks, numbered 1 through 6, takes one full hour to complete. No time elapses between the completion of any of the six tasks and the beginning of another task. The group of six tasks must be completed in the shortest possible time period, subject only to the following restrictions:
Tasks 1 and 2 must both be completed before any of the other tasks can be begun.
Task 3 must be completed before task 4 can be begun.
At any one time, no more than one task can be performed, except that tasks 4 and 5 can be performed concurrently.
1. Which of the following tasks could be the second task performed?
(A) 2
(B) 3
(C) 4
(D) 5
(E) 6
2. The shortest possible time period in which the group of six tasks can be completed is
(A) two hours
(B) three hours
(C) four hours
(D) five hours
(E) six hours
3. Which of the following CANNOT be true of any acceptable ordering of tasks?
(A) Task 1 is performed before task 2.
(B) Task 3 is performed before task 6.
(C) Task 4 is performed before task 6.
(D) Task 5 is performed before task 3.
(E) Task 6 is performed before task 3.
4. If task 6 is performed as early in the order of tasks as is permissible, then task 6 is performed
(A) first
(B) second
(C) third
(D) fourth
(E) fifth
Detailed Explanation (in Bangla)
Answer Keys
Question | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
Answer | A | D | D | C |