Module 1_Introduction to C Programming

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

• int number
  
  

• float rate

• int variable_count

• int $main

What is #include <stdio.h>?

• Preprocessor directive
  

• Inclusion directive

• File inclusion directive

• None of the mentioned

What is the sizeof(char) in a 32-bit C compiler?

• 1 bit
  

• 2 bits

• 1 Byte

• 2 Bytes

scanf() is a predefined function in______header file.

• stdlib. h
  

• ctype. h

• stdio. h

• stdarg. h

1. #include <stdio.h>

2. int main()

3. {

4. int y = 10000;

5. int y = 34;

6. printf("Hello World! %d\n", y);

7. return 0;

8. }

• Compile time error
  

• Hello World! 34

• Hello World! 1000

• Hello World! followed by a junk value

1. #include <stdio.h>

2. void main()

3. {

4. int x = 5 * 9 / 3 + 9;

5. }

• 3.75
  

• Depends on compiler
  

• 24

• 3

How many keywords are there in C Language ?

• 30
  

• 22

• 32

• 36

What is the output of this program?

#include <stdio.h>
int main()

{
  int x = 10;
  float x = 10.0;
  printf("%d",x);
  return 0;
}

• 10.1
  

• Compilations Error

• 10

• 10

Which of the following is true for variable names in C?

• Variable names cannot start with a digit
  

• Variable can be of any length

• They can contain alphanumeric characters as well as special characters

• Reserved Word can be used as variable name

What is the output of this C code?

#include <stdio.h>
int main()
{
float x = ‘a’;
printf(“%f”, x);
return 0;
}

• 97.000000
  

• run time error

• a.0000000

• a