ESTUDYR
ISYE 6644 ARENA MOST TESTED QUESTIONS AND
ANSWERS GRADED A+ WITH RATIONALES
1
In Arena, a DECIDE module can route customers probabilistically or conditionally to multiple
locations.
a. False
b. True ← Correct
Rationale: DECIDE supports both probability- and condition-based branching to multiple
destinations.
2
In Arena, a primitive QUEUE block can connect with a PROCESS module.
a. False ← Correct
b. True
Rationale: Primitive QUEUE is part of low-level constructs; PROCESS encapsulates its own
queue — you use PROCESS (or Queue spreadsheet) rather than direct primitive
QUEUE→PROCESS hookups in higher-level modeling.
3
In Arena you can pre-assign a service time as an attribute before you actually get to the server.
a. False
b. True ← Correct
Rationale: Attributes let you store per-entity values (e.g., service time) ahead of SEIZE/DELAY,
enabling later use.
4
It’s acceptable to have one CREATE module generate single arrivals and another CREATE
generate 4-at-a-time elsewhere.
a. False
b. True ← Correct
,ESTUDYR
Rationale: Multiple CREATE modules with different batch sizes are allowed and often used to
model heterogeneous arrival streams.
5
In Arena, "fake" customers can be used to schedule breakdowns, track time periods, and
perform non-customer duties.
a. False
b. True ← Correct
Rationale: Sentinels or dummy entities are commonly used for scheduling events (machine
failures, time-based logic).
6
What is the expected value of EXPO(DISC(0.5,2,1,3)) in Arena?
a. 1.5
b. 2.0
c. 2.5 ← Correct
d. 3.0
Rationale: DISC selects 2 with prob 0.5 and either 1 or 3 for remaining prob distributed —
expected selected mean = 2.5 (given the provided answer).
7
Suppose joe.queue has 7 people and tom.queue has 2 people. What is the value of
(NQ(tom.queue)>=NQ(joe.queue)) + (TNOW>-1)?
a. 0
b. 1 ← Correct
c. 2
d. -1
Rationale: (NQ(tom)>=NQ(joe)) is 0 (2≥7 false). (TNOW>-1) is 1 (time > -1 true). 0+1 = 1.
8
, ESTUDYR
In Arena, the SEIZE, DELAY, RELEASE functionality appears in multiple templates.
a. False
b. True ← Correct
Rationale: These core actions are accessible via PROCESS templates and advanced templates
(and via modules/blocks).
9
You can schedule failures to occur after a random number of customers use a resource or after
a random time.
a. False
b. True ← Correct
Rationale: Arena supports event scheduling based on counts (usage) or time (e.g., failure after
N uses or after T time).
10
You are only allowed to schedule one type of failure for a particular resource.
a. False ← Correct
b. True
Rationale: Multiple failure modes can be defined for a resource (different conditions, repair
processes).
11
A resource (e.g., Joey) can be a member of three different resource sets.
a. False
b. True ← Correct
Rationale: A resource can belong to multiple resource sets to support pooling and alternative
allocations.
12
For display and organization, an Arena Call Center simulation can be divided into submodels.
a. False
ISYE 6644 ARENA MOST TESTED QUESTIONS AND
ANSWERS GRADED A+ WITH RATIONALES
1
In Arena, a DECIDE module can route customers probabilistically or conditionally to multiple
locations.
a. False
b. True ← Correct
Rationale: DECIDE supports both probability- and condition-based branching to multiple
destinations.
2
In Arena, a primitive QUEUE block can connect with a PROCESS module.
a. False ← Correct
b. True
Rationale: Primitive QUEUE is part of low-level constructs; PROCESS encapsulates its own
queue — you use PROCESS (or Queue spreadsheet) rather than direct primitive
QUEUE→PROCESS hookups in higher-level modeling.
3
In Arena you can pre-assign a service time as an attribute before you actually get to the server.
a. False
b. True ← Correct
Rationale: Attributes let you store per-entity values (e.g., service time) ahead of SEIZE/DELAY,
enabling later use.
4
It’s acceptable to have one CREATE module generate single arrivals and another CREATE
generate 4-at-a-time elsewhere.
a. False
b. True ← Correct
,ESTUDYR
Rationale: Multiple CREATE modules with different batch sizes are allowed and often used to
model heterogeneous arrival streams.
5
In Arena, "fake" customers can be used to schedule breakdowns, track time periods, and
perform non-customer duties.
a. False
b. True ← Correct
Rationale: Sentinels or dummy entities are commonly used for scheduling events (machine
failures, time-based logic).
6
What is the expected value of EXPO(DISC(0.5,2,1,3)) in Arena?
a. 1.5
b. 2.0
c. 2.5 ← Correct
d. 3.0
Rationale: DISC selects 2 with prob 0.5 and either 1 or 3 for remaining prob distributed —
expected selected mean = 2.5 (given the provided answer).
7
Suppose joe.queue has 7 people and tom.queue has 2 people. What is the value of
(NQ(tom.queue)>=NQ(joe.queue)) + (TNOW>-1)?
a. 0
b. 1 ← Correct
c. 2
d. -1
Rationale: (NQ(tom)>=NQ(joe)) is 0 (2≥7 false). (TNOW>-1) is 1 (time > -1 true). 0+1 = 1.
8
, ESTUDYR
In Arena, the SEIZE, DELAY, RELEASE functionality appears in multiple templates.
a. False
b. True ← Correct
Rationale: These core actions are accessible via PROCESS templates and advanced templates
(and via modules/blocks).
9
You can schedule failures to occur after a random number of customers use a resource or after
a random time.
a. False
b. True ← Correct
Rationale: Arena supports event scheduling based on counts (usage) or time (e.g., failure after
N uses or after T time).
10
You are only allowed to schedule one type of failure for a particular resource.
a. False ← Correct
b. True
Rationale: Multiple failure modes can be defined for a resource (different conditions, repair
processes).
11
A resource (e.g., Joey) can be a member of three different resource sets.
a. False
b. True ← Correct
Rationale: A resource can belong to multiple resource sets to support pooling and alternative
allocations.
12
For display and organization, an Arena Call Center simulation can be divided into submodels.
a. False
