204 - Decision Science

20 Questions | By Aimsds2016 | Updated: Sep 12, 2022 | Attempts: 86

Questions

Settings

Create your own Quiz

Questions and Answers

1.

Which of the following is a valid objective function for a linear programming problem?
- A.
  
  A) Max 5 XY
- B.
  
  B) Min 4X + 3Y + 6Z
- C.
  
  C) Max 5X2 + 6Y4
- D.
  
  D) Min (X1+X2) / 3
2.

Slack is -
- A.
  
  A) the amount by which the left side of the constraint is smaller than the right side
- B.
  
  B) the difference between the left and right sides of a constraint
- C.
  
  C) the amount by which the left side of the constraint is larger than the right side
- D.
  
  D) Exists for each variable in a linear programming problem
3.

A solution that satisfies all the constraints of a linear programming problem except the non-negativity constraints is called –
- A.
  
  Optimal
- B.
  
  Feasible
- C.
  
  Infeasible
- D.
  
  Semi-feasible
4.

A simulation model uses the mathematical expressions and logical relationships of the –
- A.
  
  Real system
- B.
  
  Computer Model
- C.
  
  Performance Measures
- D.
  
  Estimated inference
5.

Analysis of a Markov Process -
- A.
  
  Describes future behavior of the system
- B.
  
  Optimizes the system
- C.
  
  Leads to higher order decision making
- D.
  
  All of the alternatives are true.
6.

In a multiple channel system –
- A.
  
  Each server has its own queue
- B.
  
  Each server has the same service rate
- C.
  
  µ > λ
- D.
  
  All of the alternatives are correct
7.

The solution of a transportation problem, with m- rows ( supplies) and n – columns ( destinations) is feasible if the number of occupied cells are -
- A.
  
  M + n
- B.
  
  M X n
- C.
  
  M + n -1
- D.
  
  M + n +1
8.

The assignment problem -
- A.
  
  Requires that only one activity be assigned to each sequence
- B.
  
  Is a special case of transportation problems
- C.
  
  Can be used for maximization objective
- D.
  
  All of the above.
9.

In (M/M/1) : (∞/FCFS) model, the system length Ls is given by -
- A.
  
  ϱ / 1-ϱ
- B.
  
  λ 2 / µ - λ
- C.
  
  1/ µ - λ
- D.
  
  ρ2 / 1-ρ
10.

In the queue model notation (a/b/c) : (d/e), what does c represent –
- A.
  
  Arrival pattern
- B.
  
  Service pattern
- C.
  
  Number of services
- D.
  
  Capacity of the system
11.

Customer behavior in which he moves from one queue to another in multiple channel situation is –
- A.
  
  Backing
- B.
  
  Reneging
- C.
  
  Jockeying
- D.
  
  Alternating
12.

While improving a solution of transportation problem, we reallocate units to the unoccupied cell having its opportunity cost as –
- A.
  
  Equal to zero
- B.
  
  Most negative number
- C.
  
  Most positive number.
- D.
  
  Any value
13.

To balance an Assignment matrix we have to -
- A.
  
  Add a dummy row
- B.
  
  Add a dummy column
- C.
  
  Remove a row or column depending upon the given situation
- D.
  
  Add a dummy row or column depending upon a given situation.
14.

MODI stands for –
- A.
  
  Modern distributions
- B.
  
  Markov distributions Method
- C.
  
  Modified Distribution Method
- D.
  
  Model Index method
15.

The prohibited cell in transportation problem is considered by considering its cost –
- A.
  
  - ∞
- B.
  
  0
- C.
  
  Negative
- D.
  
  ∞
16.

Assignment problem is solved by –
- A.
  
  Simplex Method
- B.
  
  Graphical Method
- C.
  
  Vector Method
- D.
  
  Hungarian Method
17.

The first step in solving operations research problem is –
- A.
  
  Model building
- B.
  
  Obtain alternate solutions
- C.
  
  Interpreting the variables
- D.
  
  Formulation of the problem
18.

If Ro represent state probabilities of present period then the state probabilities end of second period is given by –
- A.
  
  R2 = R1 X P2
- B.
  
  R2 = P X R1
- C.
  
  R2 = R0 X P2
- D.
  
  None of the above
19.

While using random numbers in Monte Carlo Simulation it is –
- A.
  
  Not necessary to assign the exact range of random numbers
- B.
  
  Necessary to use particular random numbers
- C.
  
  Necessary to find out cumulative probability distribution
- D.
  
  None of the above
20.

Utilization factor is –
- A.
  
  Arrival rate divided by service rate
- B.
  
  Service rate divided by arrival rate
- C.
  
  Length in the system divided by length in the queue
- D.
  
  Waiting time in system divided by waiting time in queue