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Fault Tolerance Review
Test Description: AP CSP Fault Tolerance
Instructions: Answer all questions to get your test result.
1) Which of the following best describes the ability of parallel computing solutions to improve efficiency?
A
Any problem that can be solved sequentially can be solved using a parallel solution in approximately half the time.
B
Any solution can be broken down into smaller and smaller parallel portions, making the improvement in efficiency theoreticall
C
The efficiency of a solution that can be broken down into parallel portions is still limited by a sequential portion.
D
The efficiency of parallel computing solutions is rarely improved over the efficiency of sequential computing solutions.
2) Which of the following best describes a challenge involved in using a parallel computing solution?
A
A parallel computing solution may not be appropriate for an algorithm that searches for occurrences of a key word in a large
B
A parallel computing solution may not be appropriate for an algorithm in which each step requires the output from the precedi
C
A parallel computing solution may not be appropriate for an algorithm in which the same formula is applied to many numeric da
D
A parallel computing solution may not be appropriate for an algorithm that can be easily broken down into small independent t
3) 2 Processors, 4 Processes: W (20 seconds), X (30 seconds), Y (45 seconds), and Z (50 seconds)
A
Processes W and Z should be assigned to one processor, and processes X and Y should be assigned to the other processor.
B
Processes W and X should be assigned to one processor, and processes Y and Z should be assigned to the other processor.
C
Process Z should be assigned to one processor, and processes W, X, and Y should be assigned to the other processor.
D
Processes W and Y should be assigned to one processor, and processes X and Z should be assigned to the other processor.
4) 2 processors, 2 Processes: P (30 seconds) and Q (45 seconds). What is the difference in sequential vs. ideal parallel processing time?
A
15 seconds
B
45 seconds
C
75 seconds
D
30 seconds
5) 2 Processors, 3 Processes: X (60 seconds), Y (30 seconds), and Z (50 seconds). What is the minimum time to run in parallel?
A
90 seconds
B
80 seconds
C
70 seconds
D
60 seconds
6) Which process is typically more efficient?
A
Sequential because it is the only processor able to process bits
B
Parallel because it cuts the execution time in half
C
Parallel because multiple steps are able to happen at the same time.
D
Sequential because the tasks are broken into smaller, more efficient pieces
7) What is the minimum time to process? 2 Processors, 3 Processes: Q (3 seconds), W (7 seconds), and E (3 seconds)
A
7
B
3
C
4
D
6
8) Which term describes running multiple processes at the same time?
A
Sequential
B
Parallel
9) How much time does parallel save? 2 Processors, 3 Processes: A (10 seconds), B (20 seconds), C (30 seconds)
A
10 seconds
B
20 seconds
C
30 seconds
D
0 seconds
10) 2 Processors, 4 Processes: P (30 seconds), Q (10 seconds), R (20 seconds), and S (15 seconds)
A
Running processes P and Q on one processor and processes R and S on the other processor
B
Running processes P and S on one processor and processes Q and R on the other processor
C
Running process P on one processor and processes Q, R, and S on the other processor
D
Running processes P and R on one processor and processes Q and S on the other processor
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