Technical Questions

Q:

What is a binary semaphore? What is its use?

Answer

A binary semaphore is one, which takes only 0 and 1 as values. They are used to implement mutual exclusion and synchronize concurrent processes.

Report Error

View answer Workspace Report Error Discuss

9 13487
Q:

What is page cannibalizing?

Answer

Page swapping or page replacements are called page cannibalizing.

Report Error

View answer Workspace Report Error Discuss

22 13218
Q:

Define latency, transfer and seek time with respect to disk I/O.

Answer

Seek time is the time required to move the disk arm to the required track. Rotational delay or latency is the time it takes for the beginning of the required sector to reach the head. Sum of seek time (if any) and latency is the access time. Time taken to actually transfer a span of data is transfer time.

Report Error

View answer Workspace Report Error Discuss

12 13077
Q:

What is the output of this C code?

   #include <stdio.h>
    int main()
    {
        int a = 1, b = 1;
        switch (a)
        {
        case a*b:
            printf("yes ");
        case a-b:
            printf("non");
            break;
        }
    }

A) yes B) no
C) Compile time error D) yes no
 
Answer & Explanation Answer: C) Compile time error

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Programming

5 12778
Q:

public abstract interface Frobnicate { public void twiddle(String s); } 

Which is a correct class?

A) public abstract class Frob implements Frobnicate { public abstract void twiddle(String s) { } } B) public abstract class Frob implements Frobnicate { }
C) public class Frob extends Frobnicate { public void twiddle(Integer i) { } } D) public class Frob implements Frobnicate { public void twiddle(Integer i) { } }
 
Answer & Explanation Answer: B) public abstract class Frob implements Frobnicate { }

Explanation:

B is correct, an abstract class need not implement any or all of an interface’s methods

Report Error

View Answer Report Error Discuss

Filed Under: Programming

1 12695
Q:

What will be output when you will execute following c code?

#include <stdio.h>
void main()

{
    int const SIZE = 5;
    int expr;
    double value[SIZE] = { 2.0, 4.0, 6.0, 8.0, 10.0 };
    expr=1|2|3|4;
    printf ( "%f", value[expr] );
}

A) 2.000000 B) 4.000000
C) 8.000000 D) Compilation error
 
Answer & Explanation Answer: D) Compilation error

Explanation:

Size of any array in c cannot be constantan variable.

Report Error

View Answer Report Error Discuss

Filed Under: Programming

5 12595
Q:

Which of the following statement is true?

A) Cohesion is the OO principle most closely associated with hiding implementation details B) Cohesion is the OO principle most closely associated with making sure that classes know about other classes only through their APIs
C) Cohesion is the OO principle most closely associated with making sure that a class is designed with a single, well-focused purpose D) None
 
Answer & Explanation Answer: C) Cohesion is the OO principle most closely associated with making sure that a class is designed with a single, well-focused purpose

Explanation:

A refers to encapsulation, B refers to coupling

Report Error

View Answer Report Error Discuss

Filed Under: Programming

3 12410
Q:

Physical or logical arrangement of network is

A) Topology B) Routing
C) Both A & B D) Networking
 
Answer & Explanation Answer: A) Topology

Explanation:

The logical arrangement of the nodes of different networks to communicate is called as topology.

Report Error

View Answer Report Error Discuss

20 12314