Declarations and Initializations

Q1: What are the types of linkages?

A Internal and External

B External, Internal and None

C External and None

D Internal

Q2: Which of the following special symbol allowed in a variable name?

A * (asterisk)

B | (pipeline)

C - (hyphen)

D _ (underscore)

Q3:
In the following program where is the variable a getting defined and where it is getting declared?
#include<stdio.h>
int main()
{
    extern int a;
    printf('%d\n', a);
    return 0;
}
int a=20;

A extern int a is declaration, int a = 20 is the definition

B int a = 20 is declaration, extern int a is the definition

C int a = 20 is definition, a is not defined

D a is declared, a is not defined

Q4: How would you round off a value from 1.66 to 2.0?

A
ceil(1.66)

B floor(1.66)

C roundup(1.66)

D roundto(1.66)

Q5:
Identify which of the following are declarations
1 : extern int x;
2 : float square ( float x ) { ... }
3 : double pow(double, double);

A 1

B 2

C 1 and 3

D 3

Q6: When we mention the prototype of a function?

A Defining

B Declaring

C Prototyping

D Calling

Q7:
Is there any difference between following declarations?
1 : extern int fun();
2 : int fun();

A Both are identical

B
No difference, except extern int fun(); is probably in another file

C
int fun(); is overrided with extern int fun();

D None of these

Q8: By default a real number is treated as a

A float

B double

C long double

D far double

Q9: Which of the following statements should be used to obtain a remainder after dividing 3.14 by 2.1 ?

A rem = 3.14 % 2.1;

B rem = modf(3.14, 2.1);

C rem = fmod(3.14, 2.1);

D Remainder cannot be obtain in floating point division.

Q10:
Which of the following is not user defined data type?
1 :
struct book
{
    char name[10];
    float price;
    int pages;
};
2 :
long int l = 2.35;
3 :
enum day {Sun, Mon, Tue, Wed};

A 1

B 2

C 3

D Both 1 and 2


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