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Quiz- 1

Question 1

Time: 00:00:00

Consider following given the code and predict its output.

main()

{

int num[ ] = {1,4,8,12,16};

int *a,*b;

int i;

a=num;

b=num+2;

i=*a+1;

printf("%d,%d,%d\n",i,*a,*b);

}

strchr()

strrchr()

strstr()

strnset()

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Question 2

Time: 00:00:00

What is stderr?

2,1,8

4,1,8

4,4,8

2,4,8

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Explanation: Stderr, also known as standard error, is the default file descriptor where a process can write error messages.

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Question 3

Time: 00:00:00

What will be the output of the program?



#include



int main()

{

    int i;

    char c;

    for(i=1; i<=5; i++)

    {

        scanf("%c", &c); /* given input is 'b' */

        ungetc(c, stdout);

        printf("%c", c);

        ungetc(c, stdin);

    }

    return 0;

}

2, 2, 0, 1

1, 2, 1, 0

-2, 2, 0, 0

-2, 2, 0, 1

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The ungetc() function pushes the character c back onto the named input stream, which must be open for reading.

This character will be returned on the next call to getc or fread for that stream.

One character can be pushed back in all situations.

A second call to ungetc without a call to getc will force the previous character to be forgotten.

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Question 4

Time: 00:00:00

What will be the output of the program?



#include

int main()

{

int i=-3, j=2, k=0, m;

m = ++i || ++j && ++k;

printf("%d, %d, %d, %d\n", i, j, k, m);

return 0;

}

The letter is a Now the letter is A

The letter is A Now the letter is a

Error

None of above

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Question 5

Time: 00:00:00

What will be the output of the program?



#include

int main()

{

char ch;

ch = 'A';

printf("The letter is");

printf("%c", ch >= 'A' && ch <= 'Z' ? ch + 'a' - 'A':ch); 

printf("Now the letter is"); printf("%c\n", ch >= 'A' && 

ch <= 'Z' ? ch : ch + 'a' - 'A');

return 0;

}

Error: Declaration syntax

Error: Expression syntax

Error: LValue required

Error: Rvalue required

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Question 6

Time: 00:00:00

Point out the error in the program?



#include



int main()

{

int a[] = {10, 20, 30, 40, 50};

int j;

for(j=0; j<5; j++)

{

printf("%d\n", a);

a++;

}

return 0;

}

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Question 7

Time: 00:00:00

What will be the output of the program ?



#include

void fun(int **p);



int main()

{

int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 8, 7, 8, 9, 0};

int *ptr;

ptr = &a[0][0];

fun(&ptr);

return 0;

}

void fun(int **p)

{

printf("%d\n", **p);

}

standard error

standard error types

standard error streams

standard error definitions

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Question 8

Time: 00:00:00

Which of the following statements are correct about an array?

1: The array int num[26]; can store 26 elements.

2: The expression num[1] designates the very first element in the array.

3: It is necessary to initialize the array at the time of declaration.

4: The declaration num[SIZE] is allowed if SIZE is a macro.

1,4

2,3

2,4

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1. The array int num[26]; can store 26 elements. This statement is true.

2. The expression num[1] designates the very first element in the array. This statement is false, because it designates the second element of the array.

3. It is necessary to initialize the array at the time of declaration. This statement is false.

4. The declaration num[SIZE] is allowed if SIZE is a macro. This statement is true, because the MACRO just replaces the symbol SIZE with given value.

Hence the statements '1' and '4' are correct statements.

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Question 9

Time: 00:00:00

Identify which of the following are declarations

1 : extern int x;

2 : float square ( float x ) { ... }

3 : double pow(double, double);

1 & 3

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extern int x; - is an external variable declaration.

double pow(double, double); - is a function prototype declaration.

Therefore, 1 and 3 are declarations. 2 is definition.

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Question 10

Time: 00:00:00

Which of the following function is used to find the first occurrence

of a given string in another string?

bbbb

bbbbb

Error in ungetc statement.

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["0","40","60","80","100"]

["Need more practice! \r\n","Keep trying! \r\n","Not bad! \r\n","Good work! \r\n","Perfect! \r\n"]

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