C Fundamentals — Part 2 MCQs with Explanations

Enumerated types (enums) in C are used to give names to integer constants. For example: enum days {MON, TUE, WED, THU, FRI, SAT, SUN}; This creates an enum named days where MON is assigned 0, TUE is 1, and so on. String handling functions like strcmp() and strcpy() work with strings , which are arrays of characters ( char ). They don't directly work with enum types. You cannot directly use strcmp() to compare two enum values because strcmp() expects character arrays, not integer values that enums represent. Similarly, you cannot copy an enum value using strcpy() . Therefore, the statement "String handling functions such as strcmp(), strcpy() etc can be used with enumerated types" is False .

A pointer to nothing is the correct answer to “What does the 'NULL' keyword represent in C”. This question is standard in competitive examination syllabi for C Fundamentals.

malloc is the correct answer to “Which library function is used to allocate memory dynamically in C”. This question is standard in competitive examination syllabi for C Fundamentals.

Read formatted input is the correct answer to “What is the purpose of the 'scanf' function in C”. This question is standard in competitive examination syllabi for C Fundamentals.

Transfer control is the correct answer to “What is the purpose of the 'goto' statement in C”. This question is standard in competitive examination syllabi for C Fundamentals.

<math.h> is the correct answer to “Which header file is used for mathematical functions in C”. This question is standard in competitive examination syllabi for C Fundamentals.

Indicate a volatile variable is the correct answer to “What is the significance of the 'volatile' keyword in C”. This question is standard in competitive examination syllabi for C Fundamentals.

Dennis Ritchie is the correct answer to “Who is father of C Language”. This question is standard in competitive examination syllabi for C Fundamentals.

AT & T's Bell Laboratories of USA in 1972 is the correct answer to “C Language developed at _________”. This question is standard in competitive examination syllabi for C Fundamentals.

System programming language is the correct answer to “C was primarily developed as”. This question is standard in competitive examination syllabi for C Fundamentals.

32 is the correct answer to “Standard ANSI C recognizes ______ number of keywords”. This question is standard in competitive examination syllabi for C Fundamentals.

0 is the correct answer to “What is the correct value to return to the operating system upon the successful completion of a program”. This question is standard in competitive examination syllabi for C Fundamentals.

main() is the correct answer to “Which is the only function all C programs must contain”. This question is standard in competitive examination syllabi for C Fundamentals.

A declaration occurs once, but a definition may occur many times. is the correct answer to “What is the difference between a declaration and a definition of a variable”. This question is standard in competitive examination syllabi for C Fundamentals.

printf("My salary was increased by 15%%!") is the correct answer to “"My salary was increased by 15%" Select the statement, which will EXACTLY reproduce the line of text above.”. This question is standard in competitive examination syllabi for C Fundamentals.

Depends on the C standard implemented by compilers is the correct answer to “Will the following C code compile without any error? #include <stdio.h> int main() { for (int k = 0; k < 10; k++); return 0; }”. This question is standard in competitive examination syllabi for C Fundamentals.

Compiler and linker implementations is the correct answer to “Variable name resolution (number of significant characters for the uniqueness of variable) depends on . . . . . . . .”. This question is standard in competitive examination syllabi for C Fundamentals.

-11 is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { unsigned int a = 10; a = ~a; printf("%d\n", a); }”. This question is standard in competitive examination syllabi for C Fundamentals.

2 1 is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int a = 1, b = 2; a += b -= a; printf("%d %d", a, b); }”. This question is standard in competitive examination syllabi for C Fundamentals.

6 is the correct answer to “What will be the output of the following C code? #include <stdio.h> void main() { int x = 1, y = 0, z = 5; int a = x && y || z++; printf("%d", z); }”. This question is standard in competitive examination syllabi for C Fundamentals.

Undefined (Compiler Dependent) is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int a = 1, b = 1, d = 1; printf("%d, %d, %d", ++a + ++a+a++, a++ + ++b, ++d + d++ + a++); }”. This question is standard in competitive examination syllabi for C Fundamentals.

6 is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int i = 2; int j = ++i + i; printf("%d\n", j); }”. This question is standard in competitive examination syllabi for C Fundamentals.

0 is the correct answer to “What will be the final value of j in the following C code? #include <stdio.h> int main() { int i = 10, j = 0; if (i || (j = i + 10)) //do something ; }”. This question is standard in competitive examination syllabi for C Fundamentals.

8 is the correct answer to “What will be the output of the following C function? #include <stdio.h> enum birds {SPARROW, PEACOCK, PARROT}; enum animals {TIGER = 8, LION, RABBIT, ZEBRA}; int main() { enum birds m = TIGER; int k; k = m; printf("%d\n", k); return 0; }”. This question is standard in competitive examination syllabi for C Fundamentals.

Depends on the system/compiler is the correct answer to “What is the size of an int data type”. This question is standard in competitive examination syllabi for C Fundamentals.

7 is the correct answer to “What will be the output of the following C code? #include <stdio.h> void main() { int k = 8; int m = 7; int z = k < m ? k++ : m++; printf("%d", z); }”. This question is standard in competitive examination syllabi for C Fundamentals.

Two enum symbols cannot have the same value is the correct answer to “Pick the incorrect statement with respect to enums.”. This question is standard in competitive examination syllabi for C Fundamentals.

1 is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int x = 2, y = 0; int z; z = (y++, y); printf("%d\n", z); return 0; }”. This question is standard in competitive examination syllabi for C Fundamentals.

Compile time error is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int x = 1, y = 0; x &&= y; printf("%d\n", x); }”. This question is standard in competitive examination syllabi for C Fundamentals.

-2 is the correct answer to “What will be the output of the following C code? #include <stdio.h> void main() { int a = 5 * 3 % 6 - 8 + 3; printf("%d", a); }”. This question is standard in competitive examination syllabi for C Fundamentals.

Advanced C Classes is the correct answer to “What will be the output of the following C code? #include <stdio.h> void main() { float x = 0.1; if (x == 0.1) printf("India"); else printf("Advanced C Classes"); }”. This question is standard in competitive examination syllabi for C Fundamentals.

0 is the correct answer to “What will be the final value of j in the following C code? #include <stdio.h> int main() { int i = 0, j = 0; if (i && (j = i + 10)) //do something ; }”. This question is standard in competitive examination syllabi for C Fundamentals.

Yes is the correct answer to “Will the following C code compile without any error? #include <stdio.h> int main() { int k; { int k; for (k = 0; k < 10; k++); } }”. This question is standard in competitive examination syllabi for C Fundamentals.

Multiplication of a and n is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int a = 4, n, i, result = 0; scanf("%d", &n); for (i = 0;i < n; i++) result += a; }”. This question is standard in competitive examination syllabi for C Fundamentals.

0 99 100 -1 is the correct answer to “What will be the output of the following C code? #include<stdio.h> enum hello { a,b=99,c,d=-1 }; main() { enum hello m; printf("%d\n%d\n%d\n%d\n",a,b,c,d); }”. This question is standard in competitive examination syllabi for C Fundamentals.

Compile time error is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { j = 10; printf("%d\n", j++); return 0; }”. This question is standard in competitive examination syllabi for C Fundamentals.

5 is the correct answer to “What will be the output of the following C code? #include <stdio.h> #define MAX 2 enum bird {SPARROW = MAX + 1, PARROT = SPARROW + MAX}; int main() { enum bird b = PARROT; printf("%d\n", b); return 0; }”. This question is standard in competitive examination syllabi for C Fundamentals.

Error is the correct answer to “What will be the output of the following C code? #include<stdio.h> enum shyam { a=2,b=3.56 }; enum shyam s; main() { printf("%d%d",a,b); }”. This question is standard in competitive examination syllabi for C Fundamentals.

The program will compile and print FAIL for 5 times is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { int a[5] = {1, 2, 3, 4, 5}; int i; for (i = 0; i < 5; i++) if ((char)a[i] == '5') printf("%d\n", a[i]); else printf("FAIL\n"); }”. This question is standard in competitive examination syllabi for C Fundamentals.

compiler, pre-processor is the correct answer to “One of the major difference between typedef and #define is that typedef interpretation is performed by the . . . . . . . . whereas #define interpretation is performed by the . . . . . . . .”. This question is standard in competitive examination syllabi for C Fundamentals.