C scope-rules MCQ

Q1. The continue statement cannot be used with ______ ?

1. for
2. while
3. do while
4. switch

View Answer

Q2.Who is father of C Language?

1. Bjarne Stroustrup
2. James A. Gosling
3. Dennis Ritchie
4. Dr. E.F. Codd

View Answer

Q3.C Language was developed at ?

1. AT & T Bell Laboratory
2. MIT University
3. Harvard University
4. Stanford Lab

View Answer

Q4. What will be the size of the following structure ?

#include <stdio.h>
struct temp {
 int a[10];
 char p;
};

1. 5
2. 11
3. 41
4. 44

View Answer

Q5. What is the size of a structure ?

1. C structure is always 128 bytes
2. Size of C structure is the total bytes of all elements of structure.
3. Size of C structure is the size of largest elements
4. None of the above

View Answer

Q6. A C structure of User defined datatype is also called_____ ?

1. Derived datatype
2. Secondary datatype
3. Aggregate datatype
4. All of the above

View Answer

Q7. What is the output of this program ?

#include <stdio.h>
int main() 
{
int x = 10;
float x =10.0;
printf("%d" , x);
return 0;
}

1. 10.1
2. Compilations Error
3. 10
4. 10

View Answer

Q8. Which of the following is true for variable names in C ?

1. Variable names cannot start with a digit.
2. Variable can be any length
3. They can contain alphanumeric characters as well as special characters
4. Reserved word can be used as variable name

View Answer

Q9. What is the output of this program ?

#include <stdio.h>
int main()
{
int i;
for(i=0; i < 5, i++)
{
int a = i;
}
printf("%d",a);
return 0;
}

1. Syntax error in declaration of a
2. No errors, program will show the output of 5
3. Redeclaration of a in same scope throws error
4. A is out of scope when printf is called

View Answer

Q10. what is the output of the program ?

 #include<stdio.h>
 int main() 
 {
 int p, q, r, s;
 p = 1;
 q = 2;
 r = p,q;
 s = (p , q);
 printf("p = %d",p ,q);
 return 0;
 }

1. p = 1 q = 1
2. p = 1 q = 2
3. p = 2 q = 2
4. Invalid syntax

View Answer

Q11. Which of the following is binary operator ?

1. &&
2. ||
3. both i & ii
4. !

View Answer

Q12. Which of the following statement about for loop is true ?

1. Index value is retained outside the loop
2. Index value can be changed from within the loop
3. Goto can be used to jump, out of the loop
4. All of these

View Answer

Q13. How long the following loop runs ?

for( x = 1; x = 3; x

1. Three times
2. Four times
3. Forever
4. Never

View Answer

Q14. If the following loop is implemented ?

void main() 
 {
 int num = 0;
 do {
 --num;
 printf("%d", num);
 num ++;
 }
 while(num >= 0);
 }

1. A run time error will be reported
2. The program will not enter into the loop
3. The loop will run infinitely many times
4. There will be a compilation error reported

View Answer

Q15. What is the value of 'grade' after the switch statement is executed ?

marks = 80;
 switch(marks) {
	 Case 60:
	 grade = 'C';
	 break;
	 Case 70:
	 grade = 'B';
	 break;
	 Case 80:
	 grade = 'A';
	 break;
	 default:
	 grade = 'E';

1. A
2. B
3. C
4. E

View Answer

Q16. In ______, the bodies of the two loops are merged together to form a single loop provided that they do not make any refrences to each other ?

1. Loop Unrolling
2. Strength reduction
3. loop Concatenation
4. Loop jamming

View Answer

Q17. How many number of pointer (*) does C have against a pointer variable declaration ?

1. 7
2. 127
3. 255
4. No limits

View Answer

Q18. Which of the following return-type cannot be used for a function in C ?

1. char *
2. struct
3. void
4. none of the mentioned

View Answer

Q19. The standard header _____ is used for variable list arguments (_) in C ?

1. <stdio.h>
2. <stdlib.h>
3. <math.h>
4. <stdarg.h>

View Answer

Q20. Which is valid expression ?

1. int my_num = 100,000;
2. int my_num = 100000;
3. int my_num = 1000;
4. int $my_num = 10000;

View Answer

Q21. Which of the following is not a valid C variable name ?

1. int number
2. float rate
3. int variable_count
4. int $main;

View Answer

Q22. Which keyword is used to prevent any changes in the variable within a C program ?

1. immutable
2. mutable
3. const
4. Volatile

View Answer

Q23. Property which allows to produce different executable for different platforms in C is called ?

1. File inclusion
2. Selective inclusion
3. Conditional compilation
4. Recursive macros

View Answer

Q24. The C-preprocessors are specified with _______symbol.

1. #
2. $
3. " "
4. &

View Answer

Q25. What is an example of iteration in C ?

1. for
2. while
3. do-while
4. all of the mentioned

View Answer