C Objective Questions Page 1 of 10

Hint:
C doesn't support but C++

Hint:
There are 4 types of storage classes in C and those are auto, register, extern and static. Every storage class has its own use. Whenever a local variable is declared it is counted in auto storage class. Every storage class variables have some default value. In case of auto its default values is garbage.

Hint:
We can't modify the value of const variables. Result is compilation error.

Hint:
Mathematics related functions like pow(), sqrt() belongs to math.h header file.

Hint:
Function getch() belongs to conio.h header file. This function is only supported by old compilers like Trubo C. Latest Compiler like GCC, Visual Studio doesn't support it. Instead of getch() we can use getchar() to hold the screen.

Hint:
mathio.h is not a predefined header file. However we can create our own header files with any name.

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This is very important difference in size_of() and strlen() functions. strlen() returns no of chracters in any string. While size_of() operator returns the size which is actually including '\0' (null) character, null character is inserted at the end of all strings in C programming.

Hint:
C Language doesn't supports the feature of having two functions with the same name. This is a feature of object oriented programming like C++.

Hint:
Solve more questions on functions here - https://www.cppbuzz.com/interview-questions-on-function-in-c

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Dennis MacAlistair Ritchie was an American computer scientist. He created the C programming language and, with long-time colleague Ken Thompson.

Hint:
C Language has only three loops - for, while, do while

Hint:
Always remember, a for loop with only two ; is infinite loop. And it is because there is no initialization, condition & increment/decrements

Hint:
blank for loop with ; ; is always infinite loop. printf() will never executed in this program.

Hint:
for loop should have semicolumn ; not comma , in its syntax. Using , instead of ; produces compilation error.

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C doesn't allow using preincrement & postincrement on a variable on same time like ++i++

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In this code only i is incrementing starting from 0 to 4 but j is 0 only.

Hint:
This code has 25 iterations of for loops that is why count++ is executed 25 times hence its value becomes 25.

Hint:
You might be thinking that it should print 5 times but it is printing 1 time only because for loop is terminated by ; which means for loop will run 5 times but printf() is not part of that loop.

Hint:
if we put ; after for() then for loop doesn't run anything which is inside {}

Hint:
while(1) means while will run for forever it also means while(true)