1. What will be the output of following program?
#include<stdio.h>
void main()
{
int i = 10;
static int x = i;
if (x == i)
printf("equal");
else if (x < i)))
printf("less than");
else
printf("greater than");
}
|
Options:
(a)equal
(b)greater than
(c)less than
(d)compiler error
(e)none of the above
Answer: (d)Compiler error
Explanation: Here ‘x’ is a static variable and ‘i’ is an auto variable. Auto variables are run time entities, compared to static, which are load time entities. Run time variables cannot be initialized with load time variables.
2. What will be the output of following program?
#include<stdio.h>
void main()
{
printf("%s", "i"
"am"
"good");
}
|
Options:
(a)i am good
(b)i
(c)good
(d)iamgood
(e)Compiler error
Answer: (d)iamgood
Explanation: In C, string constant “ab” is same as “a” “b”.
3. What will be the output of following program?
#include<stdio.h>
#include <string.h>
void main()
{
printf("%d %d", sizeof("program"), strlen("program"));
}
|
Options:
(a)7 7
(b)8 8
(c)8 7
(d)7 8
(e)None of the above
Answer: (c)8 7
Explanation: strlen returns length of string without counting the null character, whereas sizeof also includes the null character when counting size of string.
4. What will be the output of following program?
#include<stdio.h>
void main()
{
int colour = 2;
switch (colour) {
case 0:
printf("Black");
case 1:
printf("Red");
case 2:
printf("Aqua");
case 3:
printf("Green");
default:
printf("Other");
}
}
|
Options:
(a)Aqua
(b)AquaGreenOther
(c)AquaGreen
(d)Red
(e)none of the above
Answer: (b)AquaGreenOther
Explanation: There are no break statements in switch case, so all statements after case 2, including the default statement, will be executed.
5. What will be the output of following program?
#include<stdio.h>
void main()
{
if (printf("cisgood"))
printf("i know c");
else
printf("i know c++");
}
|
Options:
(a)i know c
(b)i know c++
(c)cisgoodi know c
(d)cisgoodi know c++
(e)compiler error
Answer: (c)cisgoodi know c
Explanation: The return type of printf is integer, that is the number of characters including blank spaces. So, here in if condition, printf evaluates to 7, which is non-negative. Thus follows the true condition.
If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
Whether you're preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape,
GeeksforGeeks Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we've already empowered, and we're here to do the same for you. Don't miss out -
check it out now!
Last Updated :
18 Sep, 2018
Like Article
Save Article