C Interview Questions And Answers

C,C++ Questions with answers, C++ Questions Interview with answers

C,C++ Questions

Questions 1. Base class has some virtual method and derived class has a method with the same name. If we initialize the base class pointer with derived
object,. calling of that virtual method will result in which method being called? 
a. Base method
b. Derived method..

Ans. b

Questions 2
For the following C program
#define AREA(x)(3.14*x*x)
main()
{float r1=6.25,r2=2.5,a;
a=AREA(r1);
printf("\n Area of the circle is %f", a);
a=AREA(r2);
printf("\n Area of the circle is %f", a);
}
What is the output?

Ans. Area of the circle is 122.656250
        Area of the circle is  19.625000

Questions 3.
What do the following statements indicate. Explain.
•     int(*p)[10]
•     int*f()
•     int(*pf)()
•     int*p[10]
Refer to:
Kernighan & Ritchie page no. 122
Schaum series page no. 323

Questions 4.
void main()
{
int d=5;
printf("%f",d);
}

Ans: Undefined

Questions 5.

void main()
{
int i;
for(i=1;i<4,i++)
switch(i)
case 1: printf("%d",i);break;
{
case 2:printf("%d",i);break;
case 3:printf("%d",i);break;
}
switch(i) case 4:printf("%d",i);
}

Ans: 1,2,3,4