C Programming - MCQ Practice Questions

What will be the output of: printf("%ld", sizeof(long double));

Which storage class has global scope and external linkage by default?

What is printed by: int x = 5; printf("%d %d", x++, ++x);?

Which of the following correctly declares a constant pointer to a constant integer?

What happens if you assign a double value to an int variable without casting?

What is the purpose of the 'volatile' keyword?

Which variable declaration uses automatic storage duration?

What is the result of: printf("%d", (int)(3.9) + 0.5);?

What is the behavior of 'auto' keyword in modern C (C99 onwards)?

Which of the following statements about 'register' keyword is TRUE?

What is the size of the 'char' data type in C on most modern systems?

What will be the output of: int x = 10; printf("%u", -x);

What is the difference between 'signed' and 'unsigned' char?

Which keyword is used to declare a variable that maintains its value between function calls?

What is the size of 'long long' data type in C99 standard?

What will be printed: float f = $\frac{5}{2}$; printf("%f", f);

Which data type would be most appropriate to store a person's age in a program?

What is the output of: int a = 5, b = 2; printf("%d", a / b);

What happens when you declare a variable without initializing it in C?

Which storage class specifier limits a variable's scope to the current file?