VAC Exam L19

All keywords in C are in ____________

• LowerCase letters

• UpperCase letters

• CamelCase letters

• None of the above

Which is valid C expression?

• int my_num = 100,000;

• int my_num = 100000;

• int my num = 1000;

• int $my_num = 10000;

Which of the following declaration is not supported by C language?

• a) String str;

• b) char *str;

• c) float str = 3e2;

• d) Both “String str;” and “float str = 3e2;”

What is #include <stdio.h>?

• a) Preprocessor directive

• b) Inclusion directive

• c) File inclusion directive

• d) None of the mentioned

The C-preprocessors are specified with _________ symbol.

• a) #

• b) $

• c) ” ”

• d) &

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

• a) 1 bit

• b) 2 bits

• c) 1 Byte

• d) 2 Bytes

What is meant by ‘a’ in the following C operation?

fp = fopen("Random.txt", "a");

• a) Attach

• b) Append

• c) Apprehend

• d) Add

What will be the output of the following C code?

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. }

• a) Compile time error

• 
  b) Hello World! 34

• c) Hello World! 1000

• d) Hello World! followed by a junk value

Will the following C code compile without any error?

1. #include <stdio.h>

2. int main()

3. {

4. for (int k = 0; k < 10; k++);

5. return 0;

6. }

• a) Yes

• b) No

• c) Depends on the C standard implemented by compilers

• d) Error

What will be the output of the following C code? (Initial values: x= 7, y = 8)

1. #include <stdio.h>

2. void main()

3. {

4. float x;

5. int y;

6. printf("enter two numbers \n");

7. scanf("%f %f", &x, &y);

8. printf("%f, %d", x, y);

9. }

• a) 7.000000, 7

• b) Run time error

• c) 7.000000, junk

• 
  d) Varies