Busıness Decısıon Models Final 1. Deneme Sınavı
Toplam 20 Soru1.Soru
An iterative algorithm aims to find .... results.
Which one is appropriate for the blank ?
exact |
approximate |
simplex |
basic |
adjacent |
approximate . pg. 89 . Correct answer is B.
2.Soru
Each individual (interested party) is called a ........ who makes decisions that are interdependent. Which term completes the blank in the previous sentence best?
Strategy |
Player |
Organization |
Pay-off |
Saddle point |
Each individual (interested party) is called a player who makes decisions that are interdependent.
3.Soru
Which of the following phrases can not be said about the Transportation Model?
A transportation problem is a linear optimization problem, which seeks to minimize the total costs of shipment of items from certain origins to a number of destinations while fulfilling the requirements of destinations and emptying the origins. |
Some transportation problems may be less restrictive; the total supply may exceed aggregate demand. |
This model has the origin locations from where a single unit can be transported to a dedicated destination, and vice versa—the model has the destinations to which a single unit is sent solely from one origin location. |
The decision variables of this problem are the amounts to be shipped for each origin-destination pairs. |
A transportation problem has a feasible solution only if the total availability meets all the requirements. |
A transportation problem is a linear optimization problem, which seeks to minimize the total costs of shipment of items from certain origins to a number of destinations while fulfilling the requirements of destinations and emptying the origins. The decision variables of this problem are the amounts to be shipped for each origin-destination pairs.
Some transportation problems may be less restrictive; the total supply may exceed aggregate demand. In such a case, a dummy destination must be defined to fictionally absorb an excessive amount of the supply. Thus, the model becomes balanced and fits the general form of the transportation model. Note that a transportation problem has a feasible solution only if the total availability meets all the requirements.
According to these, the correct answer is given in the option C.
4.Soru
What is the difference between balanced transportation model and an unbalanced one?
What is the difference between balanced transportation model and an unbalanced one?
Maximum value of the upper limits for the decision variables |
The number of degenerate variables in the optimum solution |
The equality between the total supply and total demand |
The requirement of a basis to test the optimality |
Derivability of its dual model |
(based on the model on page 114)
As a linear algebraic property of balanced transportation model, the number of independent equations is m + n – 1. Therefore, a feasible basic solution has m + n – 1 basic variables.
5.Soru
?5 3?
?2 7?
Which of the following is the mixed strategy of the row player of the game above ?
(4 / 7 , 3 / 7) |
(2 / 5 , 3 / 5) |
(2 / 3 , 1 / 3) |
(1 / 2 , 1 / 2) |
(1 / 4 , 3 / 4) |
5 p + 3 (1 – p) = 2 p + 7 (1 – p ) ; 2 p + 3 = -5 p + 7 ; 7 p = 4 ; p = 4 / 7 ; (1 – p) = 3 / 7 . pg. 153. Correct answer is A.
6.Soru
What is the most common dependence structure is called?
Decision Analysis |
Brand Switching |
Stochastic Process |
Markov Property |
Markov Chain |
The most common dependence structure is called Markov Property.
7.Soru
I.It has a special property that probabilities indicating how the process will evolve
in the future depending only on the present state of the process.
II.It indicates a decision to the decision maker.
III.It is used to analyse different decision situations, and the most well-known of these situations is “Brand Switching” in customer analysis.
Which one/ones above is/are correct about Markov analysis?
Only I |
I-II |
I-III |
II-III |
I-II-III |
Markov analysis differs from decision analysis in that it does not indicate a decision to the decision maker.
8.Soru
Which of the following does surplus represent?
The remainder of an expendable resource |
The excess amount of a restricted resource |
Functional constraints |
Equation format |
Less than or equal constraints |
A slack or surplus is utilized to reconstruct a constraint to obtain equation format. A slack variable represents the remainder of an expendable resource and applies to less than or equal constraints. On the other hand, a surplus represents the excess amount of a restricted resource and applies to greater than or equal constraints.
The correct answer is B.
9.Soru
The following matrix presents a weather prediction model. The model has four states and the names of states are a=cloudy, b=rainy, c=snowy, d=sunny.
According to matrix, which of followings show the possibility of being a sunny day after a snowy day?
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
The answer is the possibility which shows the transition from the snowy-d to sunny-c. The answer is D.
10.Soru
The following matrix presents a weather prediction model. The model has four states and the names of states are a=cloudy, b=rainy, c=snowy, d=sunny.
According to matrix, which of following is a true explanation?
The probability of being a rainy day after a snowy day is 0.3. |
The probability of being a rainy day after a cloudy day is less than the probability of being a sunny day after a rainy day. |
The probability of being a sunny day after a snowy day is more than the probability of being a snowy day after a sunny day. |
The probability of being a rainy day after a snowy day is more than the probability of being a snowy day after a rainy day. |
The probability of being a cloudy day after a snowy day is 0.2. |
Option A is wrong: The probability of being a rainy day after a snowy day is 0.5.
Option B is wrong: The probability of being a rainy day after a cloudy day is more than the probability of being a sunny day after a rainy day.
Option C is wrong: The probability of being a sunny day after a snowy day is less than the probability of being a snowy day after a sunny day.
Option D is true: The probability of being a rainy day after a snowy day is more than the probability of being a snowy day after a rainy day.
Option E is wrong: The probability of being a cloudy day after a snowy day is 0.3.
The answer is D.
11.Soru
I.The chain does not stop changing.
II.The probabilities do not change with respect to time.
III. Limiting probability may converge to steady-state values that are independent of the initial state.
Which one/ones above is/are correct about "the steady-state (or limiting) behavior of a Markov chain"?
Only I |
I-II |
I-III |
II-III |
I-II-III |
Limiting probability and it may converge to steady-state values that are independent of the initial state. The steady-state (or limiting) behavior of a
Markov chain means that the chain does not stop changing but that enough time has elapsed, so that the probabilities do not change with respect to time.
12.Soru
?1 4 6?
?3 8 5?
What is the equilibrium pair of this matrix game ?
{1st row, 2nd column} |
{1st row, 3rd column} |
{2nd row, 1st column} |
{2nd row, 3rd column} |
{1st row, 1st column} |
equilibrium point = saddle point ; lowest in rows : { 1 3 } ; max = 3 ; greatest in columns : { 3 8 6 } ; min = 3 ; max min : { 2nd row , 1st column } . pg. 152. Correct answer is C.
13.Soru
Which term is described by “a numerical value which indicates the amount gained or lost by a player at the end of the game contingent upon the course of actions all of other players”?
Pay-off |
Saddle point |
Mixed strategy |
Pure strategy |
Pay-off Matrix |
A pay-off is a numerical value which indicates the amount gained or lost by a player at the end of the game contingent upon the course of actions all of other players.
14.Soru
A state with a self-loop transition is always .........................?
Recurrent |
Periodic |
Aperiodic |
Absorbing |
Transient |
A state with a self-loop transition is always aperiodic.
15.Soru
Which of the following is not one of the steps that the transportation model has taken to reach a solution?
Identify the smallest value of each row for the cost matrix of the assignment problem. |
Determine a basic feasible solution to initiate |
Check the optimality of the basic feasible solution as the simplex method does |
If it is not, optimal, then move to the next step. If optimal, stop. |
Iterate to the next basic feasible solution by determining the entering and leaving variable using the rate of improvement on the objective value. |
The solution of a transportation model follows the steps that the simplex method offers:
1. Determine a basic feasible solution to initiate,
2. Check the optimality of the basic feasible solution as the simplex method does. If it is not, optimal, then move to the next step. If optimal, stop.
3. Iterate to the next basic feasible solution by determining the entering and leaving variable using the rate of improvement on the objective value. Return to step 2.
In this sense, the correct answer is A.
16.Soru
" The term -------- refers to the case of job allocations to a group of workers."
Which of the below is appropriate for the blank in the quoted sentence?
assignment |
transportation |
project |
optimality |
feasible |
The term “Assignment” refers to the case of job allocations to a group of workers.
17.Soru
I. The method solely focuses on CPF solutions, i.e., BF solutions.
II The selection between the adjacent BF solutions is based on the improvement in Z.
III The preferred initial BF solution is the CPF solution at the origin, where all decision variables areset to zero.
IV Optimality test subject changes from a BF solution to an adjacent one.
Which one or ones are true about simplex method?
I. The method solely focuses on CPF solutions, i.e., BF solutions.
II The selection between the adjacent BF solutions is based on the improvement in Z.
III The preferred initial BF solution is the CPF solution at the origin, where all decision variables areset to zero.
IV Optimality test subject changes from a BF solution to an adjacent one.
Which one or ones are true about simplex method?
Only I |
II, III, IV |
III, IV |
I, IV |
I, II, III, IV |
All of them are true for simplex method.
18.Soru
I.Two-person zero-sum games are also called matrix games.
II.The row player must choose 1 of m strategies and the column player must choose 1 of strategies, one after another.
III.In these games, every dollar one player wins comes out of the other player’s pocket.
Which one/ones above is/are correct about two person-zero sum games?
Only I |
I-II |
I-III |
II-III |
I-II-III |
The row player must choose 1 of m strategies and the column player must choose 1 of n strategies, simultaneously.
19.Soru
?2 3?
?4 1?
Which of the following is the value of the game above ?
4 / 3 |
3 / 2 |
5 / 3 |
7 / 3 |
5 / 2 |
2 p + 3 (1 – p) = 4 p + 1 (1 – p ) ; -p + 3 = 3 p + 1 ; 4 p = 2 ; p = 1 / 2 ; 2 (1 / 2) + 3 (1 – (1 / 2)) = 1 + (3 / 2) = 5 / 2 . pg. 152. Correct answer is E.
20.Soru
Which term completes the blank in the following sentence best? A ............. is a complete description of a player’s course of action during the game.
Strategy |
Player |
Game |
Pay-off |
Saddle point |
A strategy is a complete description of a player’s course of action during the game.
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