### Operations Research

1. Operations Research approach is ______________.

1. multi-disciplinary
2. scientific
3. intuitive
4. collect essential data
multi-disciplinary

2. A feasible solution to a linear programming problem ______________.

1. must satisfy all the constraints of the problem simultaneously
2. need not satisfy all of the constraints, only some of them
3. must be a corner point of the feasible region.
4. must optimize the value of the objective function
must satisfy all the constraints of the problem simultaneously

3. If any value in XB column of final simplex table is negative, then the solution is ______________.

1. infeasible
2. infeasible
3. bounded
4. no solution
infeasible

4. For any primal problem and its dual______________.

1. optimal value of objective function is same
2. dual will have an optimal solution iff primal does too
3. primal will have an optimal solution iff dual does too
4. both primal and dual cannot be infeasible
primal will have an optimal solution iff dual does too

5. The difference between total float and head event slack is ______________

1. free float
2. independent float
3. interference float
4. linear float
free float

6. An optimal assignment requires that the maximum number of lines which can be drawn through squares with zero opportunity cost should be equal to the number of ______________.

1. rows or columns
2. rows and columns.
3. rows+columns- 1
4. rows-columns.
rows or columns

7. To proceed with the Modified Distribution method algorithm for solving an transportation problem, the number of dummy allocations need to be added are______________.

1. n
2. n-1
3. 2n-1
4. n-2
n-1

8. Select the correct statement

1. EOQ is that quantity at which price paid by the buyer is minimum
2. If annual demand doubles with all other parameters remaining constant, the Economic Order Quantity is doubled
3. Total ordering cost equals holding cost
4. Stock out cost is never permitted
Total ordering cost equals holding cost

9. Service mechanism in a queuing system is characterized by ______________.

1. customers behavior
2. servers behavior
3. customers in the system
4. server in the system