100 Multiple Choice Questions In C Programming – Part 4
This collection of 100 Multiple Choice Questions and Answers (MCQs) In C Programming : Quizzes & Practice Tests with Answer focuses on “C Programming”.
1. What does != ?
A equals
B different
C less
D complement
2. What is the problem when declaring the following variable?
float 4Room-Hall-Kitchen?;
A The variable name starts with an integer
B The special character “-”
C The special character “?”
D All the answers are true
3. What is the output of the following C program?
#include <stdio.h>
int main()
{
int thisvariablename = 23;
int ThisVariableName = 26;
printf("%d", ThisVariableName);
return 0;
}
A The program displays 23
B The program displays 26
C The program displays a runtime error
D The program will cause a compilation error due to the re-declaration
$gcc prog4.c $ a.out 26
4. After these operations, what will “res” be equal to?
int A = 4; Res = 5 + A++; Res += 2 + A; Res -= 4 + (--A) Res = Res + A++;
A 9
B 10
C 12
D 14
X = I++: first pass the value of I to X and then increment
X = I-- : first pass the value of I to X and then decrement
X = ++I : first increments and passes the incremented value to X
X = --I : decrement first and pass the decremented value to X
Example: Let’s suppose that the value of N is equal to 5:
Postfix increment:
X = N++;
Result: N=6 and X=5
Prefix increment:
X = ++N;
Result: N=6 and X=6
5. Which of these expressions should not be declared as a variable name?
A volatile
B export
C friend
D true
6. What is the output of the following C program?
#include <stdio.h>
int main()
{
int a[4] = {1, 2, 3, 4};
int i;
for (i = 0; i < 4; i++)
if ((char)a[i] == '4')
printf("%d\n", a[i]);
else
printf("FAIL\n");
}
A Compiler reports an error
B The program compiles and displays 4
C The program compiles and displays the ASCII value of 4
D The program compiles and displays FAIL 4 times
((char)a[i] == '4') returns false. The output is as follows:
$gcc prog1.c $ a.out FAIL FAIL FAIL FAIL
7. If the variable A = 0, what is the value of the variable B when the following code is executed?
if(A != 0) B=3; else B=0;
A B = 0
B B = 3
C Compilation error
D Will throw an exception
For example:
if(condition){
do something;
}else{
do something else;
}
Can be written like this:
if(condition) instruction1; else instruction2;
Or even like this:
if(condition) instructions; else instruction2;
8. How to make the variable A be a true boolean if B contains at least 1?
A A = B > 1
B A = B !=1
C A = B > 0
D A = B >= 0
A = B > 0. So the variable A will be true, because 1 > 0.
#include <stdio.h>
int main()
{
int B = 1, A;
A = B > 0;
printf("%d", A); // 1 <=> true
return 0;
}
9. How many times do we get through the following loop?
int c = 10;
do{
c++;
printf("Hello World\n");
}
while(c < 10);
A 0
B 1
C 9
D 10
10. The identifier ‘%i’ is also used for _____?
A char
B int
C float
D double
- 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
