HONORS DISCRETE PRACTICE MULTIPLE CHOICE
CHAPTER 8: DIGRAPHS
Pick the MOST ACCURATE Answer Choice
For #1 - 9: Refer to FIGURE 1.
A
1) What is the indegree of vertex G?
A. 0 B. 1 C. 2 D. 3
2) What is the outdegree of vertex A?
A. 0 B. 1 C. 2 D. 3
3) Which vertex DOES NOT have indegree of two?
A. B
B. C
C. E
D. E and F
B
G
C
F
4) Which vertex DOES NOT have outdegree of two?
E
D
A) vertex B
B) vertex C
FIGURE #1
C) vertex D
D) vertex E
7) B is incident from …
5) Which response is NOT A PATH?
A) vertex A
B) vertex F
A) A, F, B, C
C) vertex G
D) vertices F and G
B) B, A, F
C) C, E, F, A, B
8) G is incident to …
D) D, C, G, B, C
A) vertex B
E) E, G, F, B
B) vertex F
C) vertex D
D) All of the above
6) Which response is NOT A CYCLE?
A) A, F, B, A
9) Pick the correct statement.
B) D, E, G, B, C, G, D
A) A is incident to F
C) C, G, F, B, C
B) C is incident from E
D) E, F, G, D, E
C) F is incident to A
D) All of the above are true
For # 10 – 17: Refer to FIGURE 2
10) Vertex B has
A. Indegree 2, Outdegree 1
C. Indegree 0, Outdegree 3
B. Indegree 1, Outdegree 2
C. Indegree 3, Outdegree 0
11) Which vertex does not have indegree of two?
A) vertex B
B) vertex C
C) vertex D
D) vertices C and D
12) D is incident to
A. C and E
B. C
C. E
D. A, B, C, and E
13) E is incident from
A. A
B. B
C. A and D
D. B and C
A
B
E
C
FIGURE #2
D
14) Which of the following is NOT a path
from C to E?
A. C, A, E
B. C, D, E
C. C, A, B, E
D. All of the above are paths.
16) Pick the correct statement.
A. D is incident from E.
B. A is incident to E.
C. B is incident to E.
D. E is incident from C.
15) Which of the following is NOT a cycle?
A. A, E, C, A
B. A, E, B, A
C. E, C, D, E
D. A, B, A, E, C, D, E, A
17) Pick the incorrect statement
A. B is incident from E
B. A is incident to B
C. B is incident from A
D. A is incident to C
Use for 18 – 23:
A(7)
18) The number of tasks in the project is
A. 6
B. 7
C. 8
D. 9
19) The length of the critical path from C is START(0)
A. 7
B. 12
C. 15
D. 20
20) The length of the critical path from B is
A. 4
B. 11
C. 15
D. 22
D(6)
E(5)
END(0)
B(4)
C(8)
F(7)
21) The length of the critical path for the entire project is
A. 15
B. 18
C. 30
D. 37
22) The decreasing time priority list is
A. C, A, F, D, E, B
B. A, B, C, D, E, F
C. A, B C, D, F, E
D. A, B, D, C, F, E
23) The critical time priority list is
A. C, A, F, D, E, B
B. A, B, C, D, E, F
C. A, B C, D, F, E
D. A, B, D, C, F, E
Use for #24 – 26: START(0)
A(6)
D(3)
B(4)
24) The number of tasks in this project is
A. 6
B. 7
C. 9
D. 11
G(2)
END
E(6)
F(4)
C(8)
25) The length of the critical path for this project digraph is
A. 11
B. 12
C. 14
D. 16
26) If we use the priority list F, E, A, D, B, G, C with two processors, we should start by
assigning the following tasks to the processors.
A. task A and task C
B. task B and task C
C. task B and Task E
D. task A and task B
HONORS DISCRETE PRACTICE MULTIPLE CHOICE
CHAPTER 8 – Digraphs Solutions
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C
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D
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C
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D
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