Question 1

A simulation model is validated if it adequately depicts real system performance.

Accepted Answer

A) True 
 B)False

Question 2

You are reviewing a simulation model and find that the analyst who prepared the model used the formula =NORM.INV(RAND(),50,3) to generate the cost of a product. Which of the following assumptions did the analyst make about the product cost?
I. The minimum cost is 50.
II. The average (mean) cost is 50.
III. The cost is uniformly distributed.

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II only 
E)  II and III only

Question 3

A Data Table can be used to "trick" Excel to perform many replications of a computer simulation.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following would not be considered a main advantage of simulation?

Accepted Answer

A)  It permits experimentation with the system. 
B)  It generates an optimal solution. 
C)  It compresses time. 
D)  It can serve as a training tool. 
E)  All of the answers choices are advantages.

Question 5

Computer simulation is a useful tool because it generates accurate information using very small samples.

Accepted Answer

A) True 
 B)False

Question 6

You have been asked to simulate the process of "flipping" two identical, unbiased coins. What is the probability of the outcome where one coin is heads and the other is tails? (Hint: Once the coins are flipped it is impossible to tell which is which.)

Accepted Answer

A)  0.10 
B)  0.25 
C)  0.45 
D)  0.50 
E)  0.75

Question 7

Which of the following is not a reason for simulation's popularity?

Accepted Answer

A)  It is simple to use and/or understand. 
B)  Extensive software packages are available. 
C)  Many situations are too complex for mathematical solutions. 
D)  If can be used for a wide range of applications. 
E)  It is typically an inexpensive approach.

Question 8

Which of the following can be used for computer simulation?

Accepted Answer

A)  Spreadsheets 
B)  Programming languages 
C)  Simulation languages 
D)  Simulators 
E)  All of the answers choices are correct.

Question 9

In a model of a stochastic system, the simulation clock is mainly used to

Accepted Answer

A)  determine how much computer time to use for the simulation. 
B)  determine how fast the computer can run the simulation. 
C)  determine the amount of simulated time that has elapsed at any point in the simulation. 
D)  estimate how long the simulation will run. 
E)  measure the number of events that will happen during the simulation.

Question 10

Simulation models are fairly easy to use and understand; therefore they can be used for a wide range of decisions.

Accepted Answer

A) True 
 B)False

Question 11

You have been asked to simulate the process of "flipping" two identical, unbiased coins. How many possible outcomes exist for this process? (Hint: Once the coins are flipped it is impossible to tell which is which.)

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 12

Computers can simulate years of operation in seconds.

Accepted Answer

A) True 
 B)False

Question 13

The "next-event time advance" procedure does which of the following?
I. Determines which upcoming event will occur first.
II. Advances the time of the simulation to the next event time.
III. Generates a random variable to select the next event which will happen.

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II only 
E)  II and III only

Question 14

On cold mornings, the probability that David's car won't start is 0.22. When it doesn't start, he takes the bus and is late for work. When it does start, he drives to work on the freeway. Sixty-five percent of the time the freeway is clear, and he gets to work on time. The rest of the time he is late. Simulate 10 consecutive days' worth of trips to work using the random numbers given (use the smaller numbers to represent "car won't start" and "freeway clear").
Random numbers:
$$\begin{array} { | c | c | } 
\hline \text { Car } & \text { Traffic } \
\hline 0.7772 & 0.2282 \
\hline 0.2902 & 0.3674 \
\hline 0.8120 & 0.1654 \
\hline 0.2259 & 0.6909 \
\hline 0.0527 & 0.7010 \
\hline 0.2958 & 0.9802 \
\hline 0.2891 & 0.5615 \
\hline 0.0131 & 0.5604 \
\hline 0.5219 & 0.4361 \
\hline 0.9949 & 0.1405 \
\hline
\end{array}$$
How many times is David late for work?

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
E)  5.

Question 15

On cold mornings, the probability that David's car won't start is 0.22. When it doesn't start, he takes the bus and is late for work. When it does start, he drives to work on the freeway. Sixty-five percent of the time the freeway is clear, and he gets to work on time. The rest of the time he is late. Simulate 10 consecutive days' worth of trips to work using the random numbers given (use the smaller numbers to represent "car won't start" and "freeway clear").
Random numbers:
$$\begin{array} { | c | c | } 
\hline \text { Car } & \text { Traffic } \
\hline 0.7772 & 0.2282 \
\hline 0.2902 & 0.3674 \
\hline 0.8120 & 0.1654 \
\hline 0.2259 & 0.6909 \
\hline 0.0527 & 0.7010 \
\hline 0.2958 & 0.9802 \
\hline 0.2891 & 0.5615 \
\hline 0.0131 & 0.5604 \
\hline 0.5219 & 0.4361 \
\hline 0.9949 & 0.1405 \
\hline
\end{array}$$
How many times is David late for work because his car won't start?

Accepted Answer

A)  0. 
B)  1. 
C)  2. 
D)  3. 
E)  4.

Question 16

A manager is simulating the number of times a machine operator stops a machine to make adjustments. After careful study the manager found that the number of stops ranged from one to five per cycle and that each number of stops was equally likely. Using the random numbers 0.1835 and 0.3094 (in that order), the next two simulated cycles would respectively have stops for adjustment of:

Accepted Answer

A)  2 and 2. 
B)  1 and 2. 
C)  2 and 1. 
D)  1 and 1. 
E)  2 and 3.

Question 17

When using a random number table, it is important to always start at the same point of the table so that results may be replicated.

Accepted Answer

A) True 
 B)False

Question 18

A simulation model is often formulated in terms of a flow diagram.

Accepted Answer

A) True 
 B)False

Question 19

Animation can be used to display computer simulations in action.

Accepted Answer

A) True 
 B)False

Exam 12: Computer Simulation: Basic Concepts

A simulation model is validated if it adequately depicts real system performance.

A Data Table can be used to "trick" Excel to perform many replications of a computer simulation.

Which of the following would not be considered a main advantage of simulation?

Computer simulation is a useful tool because it generates accurate information using very small samples.

You have been asked to simulate the process of "flipping" two identical, unbiased coins. What is the probability of the outcome where one coin is heads and the other is tails? (Hint: Once the coins are flipped it is impossible to tell which is which.)

Which of the following is not a reason for simulation's popularity?

Which of the following can be used for computer simulation?

In a model of a stochastic system, the simulation clock is mainly used to

Simulation models are fairly easy to use and understand; therefore they can be used for a wide range of decisions.

You have been asked to simulate the process of "flipping" two identical, unbiased coins. How many possible outcomes exist for this process? (Hint: Once the coins are flipped it is impossible to tell which is which.)

Computers can simulate years of operation in seconds.

The "next-event time advance" procedure does which of the following? I. Determines which upcoming event will occur first. II. Advances the time of the simulation to the next event time. III. Generates a random variable to select the next event which will happen.

When using a random number table, it is important to always start at the same point of the table so that results may be replicated.

A simulation model is often formulated in terms of a flow diagram.

Animation can be used to display computer simulations in action.