- What will be the output of the following code snippet?
#include <stdio.h>
int main() {
int x = 5;
printf("%d\n", x++);
printf("%d\n", ++x);
return 0;
}
a) 5, 7
b) 5, 6
c) 6, 7
d) 6, 6
**Answer: b) 5, 6**
112. In C, what is the purpose of the free() function?
a) It deallocates memory. b) It fills a block of memory with a particular value. c) It copies a block of memory to another block. d) It concatenates two strings. **Answer: a) It deallocates memory.**
113. What will be the output of the following code?
#include <stdio.h>
int main() {
char str[10] = "Hello";
printf("%s\n", str);
return 0;
}
a) Hello
b) Compiler error
c) Undefined behavior
d) No output
**Answer: a) Hello**
114. Which of the following functions is used to convert a string to an integer in C?
a) atoi() b) itoa() c) atof() d) stoi() **Answer: a) atoi()**
115. What will be the output of the following code?
#include <stdio.h>
int main() {
int x = 5, y = 10;
printf("%d\n", (x < y) ? x : (y < x) ? y : (x = y));
return 0;
}
a) 5
b) 10
c) 15
d) Compiler error
**Answer: a) 5**
116. In C, what is the purpose of the fgets() function?
a) To read a line from a file b) To read a character from a file c) To read a line from the console d) To read a character from the console **Answer: a) To read a line from a file**
117. What will be the output of the following code?
#include <stdio.h>
int main() {
int x = 5;
printf("%f\n", (float)x);
return 0;
}
a) 5.000000
b) 5
c) Compiler error
d) Undefined behavior
**Answer: a) 5.000000**
118. Which of the following is the correct syntax to declare a structure in C?
a) struct { int x; };
b) structure { int x; };
c) struct x { int x; };
d) struct { int x; } x;
**Answer: c) struct x { int x; };**
119. What will be the output of the following code?
#include <stdio.h>
int main() {
int x = 5;
printf("%p\n", &x);
return 0;
}
a) Address of x
b) Value of x
c) Address of ptr
d) Compiler error
**Answer: a) Address of x**
120. Which of the following functions is used to compare two strings in C?
a) strcmp() b) strcat() c) strlen() d) strcpy() **Answer: a) strcmp()**
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