UGC NET CS 2015 Dec – III

Question 71

Consider the following conditions:

 (a)The solution must be feasible, i.e. it must satisfy all the supply and demand constraints. 

(b)The number of positive allocations must be equal to m1n21, where m is the number of rows and n is the number of columns. 

(c)All the positive allocations must be in independent positions. 

The initial solution of a transportation problem is said to be non-degenerate basic feasible solution if it satisfies: Codes:

• (a) and (b) only

• (a) and (c) only

• (b) and (c) only

• (a), (b) and (c)

Question 72

Which of the following is used to make an Abstract class?

• Making atleast one member function as pure virtual function
• Making atleast one member function as virtual function
• Declaring as Abstract class using virtual keyword
• Declaring as Abstract class using static keyword

Question 73

In Unix, the command to enable execution permission for file “mylife” by all is ____________.

• Chmod ugo + X myfile
• Chmod a + X myfile
• Chmod + X myfile
• All of the above

Question 74

In Unix operating system, special files are used to:

• buffer data received in its input from where a process reads
• provide a mechanism to map physical device to file names
• store list of file names plus pointers associated with i-nodes
• store information entered by a user application program or utility program