C

What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int var = 010;
```
```
        printf("%d", var);
```
```
    }
```

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What will be the output of the following C code on a 32-bit machine?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int x = 10000;
```
```
        double y = 56;
```
```
        int *p = &x;
```
```
        double *q = &y;
```

        printf("p and q are %d and %d", sizeof(p), sizeof(q));

```
        return 0;
```
```
    }
```

p and q are 4 and 4

p and q are 4 and 8

compiler error

p and q are 2 and 8

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Which data type is most suitable for storing a number 65000 in a 32-bit system?

signed short

unsigned short

long

int

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int y = 10000;
```
```
        int y = 34;
```
```
        printf("Hello World! %d\n", y);
```
```
        return 0;
```
```
    }
```

Compile time error

Hello World! 34

Hello World! 1000

Hello World! followed by a junk value

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        int x = 4, y, z;
```
```
        y = --x;
```
```
        z = x--;
```
```
        printf("%d%d%d", x,  y, z);
```
```
    }
```

3 2 3

2 3 3

3 2 2

2 3 4

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int i = 2;
```
```
        int i = i++ + i;
```
```
        printf("%d\n", i);
```
```
    }
```

= operator is not a sequence point

++ operator may return value with or without side effects

it can be evaluated as (i++)+i or i+(++i)

= operator is a sequence point

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Which of the following typecasting is accepted by C?

Widening conversions

Narrowing conversions

Widening & Narrowing conversions

None of the mentioned

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int i = 23;
```
```
        char c = -23;
```
```
        if (i < c)
```
```
            printf("Yes\n");
```
```
        else
```
```
            printf("No\n");
```
```
    }
```

Yes

Depends on the compiler

Depends on the standard

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Which among the following is NOT a logical or relational operator?

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int i = 1;
```
```
        if (i++ && (i == 1))
```
```
            printf("Yes\n");
```
```
        else
```
```
            printf("No\n");
```
```
    }
```

Yes

Depends on the compiler

Depends on the standard

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Which of the following data type will throw an error on modulus operation(%)?

char

short

int

float

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The name of the variable used in one function cannot be used in another function.

True

False

May be

None of the mentioned

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        const int i = 10;
```
```
        int *ptr = &i;
```
```
        *ptr = 20;
```
```
        printf("%d\n", i);
```
```
        return 0;
```
```
    }
```

Compile time error

Compile time warning and printf displays 20

Undefined behaviour

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        const int p;
```
```
        p = 4;
```
```
        printf("p is %d", p);
```
```
        return 0;
```
```
    }
```

p is 4

Compile time error

p is followed by a garbage value

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    #define MAX 2
```

    enum bird {SPARROW = MAX + 1, PARROT = SPARROW + MAX};

```
    int main()
```
```
    {
```
```
        enum bird b = PARROT;
```
```
        printf("%d\n", b);
```
```
        return 0;
```
```
    }
```

Compilation error

c) Undefined value

2c) Undefined value

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What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int var = 010;
```
```
        printf("%d", var);
```
```
    }
```

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Which of the data types has the size that is variable?

int

struct

float

double

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Which is correct with respect to the size of the data types?

char > int > float

int > char > float

char < int < double

double > char > int

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The format identifier ‘%i’ is also used for _____ data type.

char

int

float

double

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Which of the following cannot be a variable name in C?

volatile

true

friend

export

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Which of the following is not a valid variable name declaration?

int _a3;

int a_3;

int 3_a;

int _3a

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Library function pow() belongs to which header file?

square.h

mathio.h

stdio.h

math.h

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If storage class is missing in the array definition, by default it will be taken to be

static

automatic

either automatic or external depending on the place of occurrence

external

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What do the ‘c’ and ‘v’ in argv stands for?

‘c’ means argument count ‘v’ means argument vector

‘c’ means argument control ‘v’ means argument vector

c’ means argument configuration ‘v’ means argument visibility

‘c’ means argument count ‘v’ means argument vector

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What does the following declaration mean?

int (*ptr)[10];

ptr is an array of 10 integers

ptr is array of pointers to 10 integers

ptr is an pointer to array

ptr is a pointer to an array of 10 integers

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What will be printed as the result of the operation below:

int x;

int modifyvalue()

{

return(x+=10);

}

int changevalue(int x)

{

return(x+=1);

}

void main()

{

int x=10;

x++;

changevalue(x);

x++;

modifyvalue();

printf(“First output:%dn”,x);

x++;

changevalue(x);

printf(“Second output:%dn”,x);

modifyvalue();

printf(“Third output:%dn”,x);

}

12, 13, 13

12, 12, 12

13, 13, 13

12, 12, 13

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What is the output of following program?

void f1(){

extern int g;

static int s=5;

int a;

++g;

a=s++;

printf(“%d%d%d”,a,s,g);

if(a<=6)

f1();

printf(“%d%d%d”,a,s,g);

}

void f2(){

static int s;

int a;

a=++s;

++g;

printf(“%d%d%d”,a,s,g);

if(a<=2)

f2();

printf(“%d%d%d”,a,s,g);

}

main(){

f1();

f2();

}

error

0 5 garbase

1 6 1

1 6 2

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What is the difference between a declaration and a definition of a variable?

Both can occur multiple times, but a definition must occur first

Both can occur multiple times, but a declaration must occur first.

A declaration occurs once, but a definition may occur many times

A definition occurs once, but a declaration may occur many times.

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Assuming a short is two bytes long, what will be printed by the above code?

short testarray[4][3] = { {1}, {2,3}, {4,5,6}};
printf("%d", sizeof(testarray));

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Type	Storage size	Value range
char	1 byte	-128 to 127 or 0 to 255
unsigned char	1 byte	0 to 255
signed char	1 byte	-128 to 127
int	2 or 4 bytes	-32,768 to 32,767 or -2,147,483,648 to 2,147,483,647
unsigned int	2 or 4 bytes	0 to 65,535 or 0 to 4,294,967,295
short	2 bytes	-32,768 to 32,767
unsigned short	2 bytes	0 to 65,535
long	4 bytes	-2,147,483,648 to 2,147,483,647
unsigned long	4 bytes	0 to 4,294,967,295

“My salary was increased by 15%” Select the statement, which will EXACTLY reproduce the line of text above.

printf(“My salary was increased by 15%!”);

printf(“My salary was increased by 15/%!”);

printf(“My salary was increased by 15%%!”);

printf(“My salary was increased by 15’%’!”);

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