Explore topic-wise MCQs in C Programming.

This section includes 65 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

51.

Macro calls and function calls work exactly similarly.

A. 1
B.
Answer» C.
Discussion
52.

Will the following program print the message infinite number of times? #include #define INFINITELOOP while(1) int main() { INFINITELOOP printf("IndiaBIX"); return 0; }

A. Yes
B. No
C. Yes
D. No
Answer» B. No
Discussion
53.

Preprocessor directive #undef can be used only on a macro that has been #define earlier

A. 1
B.
Answer» B.
Discussion
54.

A preprocessor directive is a message from programmer to the preprocessor.

A. 1
B.
Answer» B.
Discussion
55.

Point out the error in the program #include int main() { int i; #if A printf("Enter any number:"); scanf("%d", &i); #elif B printf("The number is odd"); return 0; }

A. Error: unexpected end of file because there is no matching #endif
B. The number is odd
C. Garbage values
D. None of above
Answer» B. The number is odd
Discussion
56.

There exists a way to prevent the same file from getting #included twice in the same program.

A. 1
B.
Answer» B.
Discussion
57.

In a macro call the control is passed to the macro.

A. 1
B.
C. 1
D.
Answer» C. 1
Discussion
58.

What will be the output of the program? #include #define SQUARE(x) x*x int main() { float s=10, u=30, t=2, a; a = 2*(s-u*t)/SQUARE(t); printf("Result = %f", a); return 0; }

A. Result = -100.000000
B. Result = -25.000000
C. Result = 0.000000
D. Result = 100.000000
Answer» B. Result = -25.000000
Discussion
59.

In which stage the following code #include gets replaced by the contents of the file stdio.h

A. During editing
B. During linking
C. During execution
D. During preprocessing
Answer» E.
Discussion
60.

Point out the error in the program #include #define SI(p, n, r) float si; si=p*n*r/100; int main() { float p=2500, r=3.5; int n=3; SI(p, n, r); SI(1500, 2, 2.5); return 0; }

A. 26250.00 7500.00
B. Nothing will print
C. Error: Multiple declaration of si
D. Garbage values
Answer» D. Garbage values
Discussion
61.

If the file to be included doesn't exist, the preprocessor flashes an error message.

A. 1
B.
C. 1
D.
Answer» B.
Discussion
62.

What will be the output of the program? #include #define MAN(x, y) ((x)>(y)) ? (x):(y); int main() { int i=10, j=5, k=0; k = MAN(++i, j++); printf("%d, %d, %d\n", i, j, k); return 0; }

A. 12, 6, 12
B. 11, 5, 11
C. 11, 5, Garbage
D. 12, 6, Garbage
Answer» B. 11, 5, 11
Discussion
63.

Which of the following are correct preprocessor directives in C? 1: #ifdef 2: #if 3: #elif 4: #undef

A. 1, 2
B. 4
C. 1, 2, 4
D. 1, 2, 3, 4
Answer» E.
Discussion
64.

Will the program compile successfully? #include #define X (4+Y) #define Y (X+3) int main() { printf("%d\n", 4*X+2); return 0; }

A. Yes
B. No
C. Yes
D. No
Answer» C. Yes
Discussion
65.

What will the SWAP macro in the following program be expanded to on preprocessing? will the code compile? #include #define SWAP(a, b, c)(c t; t=a, a=b, b=t) int main() { int x=10, y=20; SWAP(x, y, int); printf("%d %d\n", x, y); return 0; }

A. It compiles
B. Compiles with an warning
C. Not compile
D. Compiles and print nothing
Answer» D. Compiles and print nothing
Discussion