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What is the correct answer?

4

What will be output if you will compile and execute the following c code?
#include 
int main(){
int i=320;
char *ptr=(char *)&i;
printf("%d",*ptr);
return 0;
}

A. 1

B. 64

C. 320

D. Compiler Error

Correct Answer :

B. 64


As we know size of int data type is two byte while char pointer can pointer one byte at time.


Memory representation of int i=320
memory

So char pointer ptr is pointing to only first byte as shown above figure.


*ptr i.e. content of first byte is 01000000 and its decimal value is 64.

Related Questions

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4

Which of the following is the most preferred way of throwing and handling exceptions?

A. Throw by value and catch by reference.

B. Throw by reference and catch by reference.

C. Throw by value and catch by value

D. Throw the pointer value and provide catch for teh pointer type.

What is the correct answer?

4

Right shifting an operand 1bit is equivalent to multiplying it by 2.

A. True

B. False

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4

The output of the following code is:
void main() 
{
char a = 'B';
switch (a)
{
case 'A' : printf("a");
case 'B' : printf("b");
default : printf("c");
}

A. B

B. b

C. bca

D. bc

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4

What does STL stand for?

A. Simple Template Library

B. Standard Template Library

C. Static Type Library

D. Single Type-based Library

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4

Which options shows the correct hierarchy of arithmetic operators

A. **, * or /, + or -

B. **, *, /, +, -

C. **< /< *< +<-

D. / or *, - or +

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4

------ is the ternary operator

A. ?,-

B. ?,:

C. ++<--

D. none of the above

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4

Which of the following is not an infinite loop

A. int i =1;
while (1)
{i++;}

B. for( ; ; );

C. int true=0< false;
while (true)
{false = 1;}

D. int y, x = 0;
do
{y = x;}
while (x==0);

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4

The output of the following code is:
main() 
{
int a = 5, b = 6;
(a == b? printf("%d", a));
}

A. 0

B. 5

C. Error

D. None of the above

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4

What is C Tokens?

A. The smallest individual units of c program

B. The basic element recognized by the compiler

C. The largest individual units of program

D. A & B Both

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4

Which of the following is not true about preprocessor directives

A. They begin with a hash symbol

B. They are processed by a preprocessor

C. They form an integral part of the code

D. They have to end with a semi colon

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4

The contents of a file opened in 'r+' mode cannot be changed.

A. True

B. False

What is the correct answer?

4

No commas or blanks are allowed within an integer or a real constant.

A. True

B. False

What is the correct answer?

4

unsigned' is a valid variable name.

A. True

B. False

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4

What's wrong? (x = 4 && y = 5) ? (a = 5) ; (b = 6);

A. the question mark should be an equal sign

B. the first semicolon should be a colon

C. there are too many variables in the statement

D. the conditional operator is only used with apstrings

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4

An array declared as A[100][100] can hold a maximum of 100 elements.

A. True

B. False

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4

The printf() function retunes which value when an error occurs?

A. Positive value

B. Zero

C. Negative value

D. None of these

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4

The output of the following code is:
main() 
{
int a = 0;
for (; i = 0; i++)
printf("%d", a);
}

A. 0

B. Nothing will be displayed

C. Infinite loop

D. None of the above

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4

The expression 'int j = 6 + 3 % -9;' evaluates to -1.

A. True

B. False

What is the correct answer?

4

All macro substitutions in a program are done before compilation of the program.

A. True

B. False

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4

Which of the following expressions is wrong

A. float a =123.56;

B. char ch ='T' * 'A';

C. char ch ='T' *20;

D. 3 +a = b;

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4

Which header file is essential for using strcmp() function?

A. string.h

B. strings.h

C. text.h

D. strcmp.h

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4

How many times the following loop will execute?
for (a = 0; a < 4; a++)
printf("hello
");

A. 3

B. 4

C. 5

D. infinite

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4

the value *(&i) is same as printing the value of address of i.

A. True

B. False

What is the correct answer?

4

A continue statement causes execution to skip to

A. the return 0; statement

B. the first statement after the loop

C. the statement following the continue statement

D. the next iteration of the loop

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4

The output of the following code is:
main() 
{
int a[10], i;
for (i = 1; I <= 0; i++)
{
scanf("%d", a[i]);
printf("%d", a[i]);
}
}

A. 10

B. Logical error

C. Runtime error

D. 1 to 10 will be displayed

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4

The default initial value of automatic storage class is 0.

A. True

B. False

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4

C programs are converted into machine language with the help of

A. An Editor

B. A compiler

C. An operating system

D. None of the above

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4

static variable will not always have assigned value.

A. True

B. False

What is the correct answer?

4

The identifier argv[] is a pointer to an array of strings.

A. True

B. False

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4

The expression "int i = j = k = 0;" is invalid.

A. True

B. False