# Quiz - Performance Modeling

8 Questions | Total Attempts: 115  Settings  Performance Modeling is as much a science as it is art and one of the less understood topics by developers. Performance modeling is mot same as Performance testing using Load/Stress methodology although data collected through testing can be extremely useful to properly initialize the model and validate it. This quiz touches upon some of the fundamental formulas used in performance modeling.

• 1.
Mean service time per completion at resource i; Si is equal to
• A.

T/Ci

• B.

Bi/Ci

• C.

Ai/Ci

• D.

Bi/C0

• 2.
Utilization of resource i; Ui is equal to
• A.

Ai/T

• B.

Bi/T

• C.

Ai/A0

• D.

Bi/C0

• 3.
Throughput (i.e., completions per unit time) of resource i; Xi is equal to
• A.

Bi/T

• B.

Ai/T

• C.

Ci/T

• D.

Ci/C0

• 4.
Arrival rate (i.e., arrivals per unit time) at resource i;  λi is equal to
• A.

Ai/T

• B.

Ai/A0

• C.

(Ai-Ci)/T

• D.

(Ai-Ci)/A0

• 5.
Which of the equation represent Utilization Law?
• A.

Ui = Xi x Si

• B.

Ui = Vi x Xo

• C.

Ui = Vi x Si

• D.

Ui = X0 x Si

• 6.
Which of the equation represent Forced Flow Law?
• A.

Di = Vi x Si

• B.

Xi = Vi x Xo

• C.

Vi = Xi x Si

• D.

Xi = Bi x Xo

• 7.
Which of the equation represent Service demand Law?
• A.

Di = Vi x Xo

• B.

Di = Xi x Si

• C.

Di = Bi x Xo

• D.

Di = Vi x Si

• 8.
Which of the equation represents Interactive Response Time Law where M represents the number of clients?
• A.

R = M/Xo - Z

• B.

R = M/Xo + Z

• C.

R = Xo/M - Z

• D.

R = Xo/M + Z

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