100 Multiple Choice Questions In C Programming – Part 13
This collection of 100 Multiple Choice Questions and Answers (MCQs) In C Programming : Quizzes & Practice Tests with Answer focuses on “C Programming”.
1. Which keyword is used to prevent any modification of a variable in a C program?
A volatile
B const
C immutable
D mutable
B
The keyword “const” stands for a constant in a C program.
2. Which of the following is not a declaration of a pointer?
A char *str;
B char a[10];
C char a;
D char a[] = {‘10’, ‘20’, ‘30’, ‘40’};
C
An array is a constant pointer to the first element of the array.
3. What is the output of the following C program?
#include <stdio.h>
void main()
{
int var = 6;
float var = 6;
printf("%d", var )
}
A 6.0000000
B 6.8
C 6
D Compilation error
D
Since the variable “var” is defined as both “int” and “float”, it causes an error. The output is as follows:
$ cc prog1.c prog1.c: In function ‘main’: prog1.c:5: error: conflicting types for ‘var’ prog1.c:4: note: previous definition of ‘var’ was here prog1.c:6: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘double’ prog1.c:7: error: expected ‘;’ before ‘}’ token
4. Which statement is false?
A A variable refers to a position in the memory
B A variable must be declared and defined at the same time
C A single variable cannot be defined with two different types in the same scope
D A variable that has been defined previously can be defined again with a different scope
B
It is not an error, if the variable is declared and not defined.
5. Can a variable declared in a function be used in the main() function?
A False
B True
C True if it is declared static
D True if it is declared static
A
Since the scope of a variable declared in a function is limited only in that function, the statement is false.
6. The variable name used in one function cannot be used in another function?
A False
B True
C Maybe
D None of the above
A
Since the scope of a variable declared in a function is limited only within that function, the same name can be used to declare another variable in another function.
7. What is the output of the following C program?
#include <stdio.h>
int main()
{
enum {STRAWBERRY = 6, BANANA, APPLE = 2, AUBERGINE};
printf("AUBERGINE = %d\n", AUBERGINE);
}
A AUBERGINE = 3
B AUBERGINE = 2
C AUBERGINE = 6
D AUBERGINE = 7
A
An enum element’s value depends on the value assigned to the previous element. The output is as follows:
$gcc prog1.c $ a.out AUBERGINE = 3
8. What is the output of the following C program?
#include <stdio.h>
int main()
{
printf("C Programming %s", "Function by\n%s StackHowTo", "WWW");
}
A
C Programming Function by
WWW StackHowTo
B
C Programming Function by\n%s StackHowTo
C
C Programming Function by
%s StackHowTo
D Compilation error
C
This program has only one %s in the first quotes ” “, so it does not read the string “WWW”. The output is as follows:
$gcc prog1.c $ a.out C Programming Function by %s StackHowTo
9. The pointer “str” contains a reference to which string ____?
char * str = "Hello\0" "World!";
A Hello
B Hello\0world!
C Helloworld!
D Invalid statement
A
‘\0’ is accepted as a char in the string.
#include <stdio.h>
#include <string.h>
int main()
{
char * str = "Hello\0" "World!";
printf("%s", str);
return 0;
}
Output:
Hello
10. What is the output of the following C program?
#include <stdio.h>
#define x 20
int main()
{
const int x = 7;
printf("x = %d\n", x);
}
A x = 7
B x = 20
C Compilation error
D Runtime error
C
#define replaces x with 20, the identifier will be replaced by a value, since x is a constant, we can’t change it and therefore a compilation error. The output is as follows:
$gcc prog2.c $ a.out prog2.c: In function ‘main’: prog2.c:5: error: expected identifier or ‘(’ before numeric constant
- 100 Multiple Choice Questions In C Programming – Part 1
- 100 Multiple Choice Questions In C Programming – Part 2
- 100 Multiple Choice Questions In C Programming – Part 3
- 100 Multiple Choice Questions In C Programming – Part 4
- 100 Multiple Choice Questions In C Programming – Part 5
- 100 Multiple Choice Questions In C Programming – Part 6
- 100 Multiple Choice Questions In C Programming – Part 7
- 100 Multiple Choice Questions In C Programming – Part 8
- 100 Multiple Choice Questions In C Programming – Part 9
- 100 Multiple Choice Questions In C Programming – Part 10
- 100 Multiple Choice Questions In C Programming – Part 11
- 100 Multiple Choice Questions In C Programming – Part 12
- 100 Multiple Choice Questions In C Programming – Part 13
- 100 Multiple Choice Questions In C Programming – Part 14
