Explore topic-wise MCQs in C Programming.

This section includes 151 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

101.

What does the following function returns void *memmove(void *s1,const void s2, size_t n);?

A. returns the value of s1
B. returns the value of s2
C. doesn't return any value
D. returns the value of s1 and s2
Answer» B. returns the value of s2
Discussion
102.

Which among the given options is the right explanation for the statement size_t strcspn(c, s)?

A. return length of prefix of s consisting of characters not in c
B. return length of prefix of s consisting of characters present in c
C. return length of prefix of c consisting of characters not in s
D. return length of prefix of c consisting of characters present in s
Answer» D. return length of prefix of c consisting of characters present in s
Discussion
103.

What is the function of void *memset(s, c, n)?

A. places character s into first n characters of c, return c
B. places character c into first n characters of s, return s
C. places character s into first n characters of c, return s
D. places character c into first n character of s, return c
Answer» C. places character s into first n characters of c, return s
Discussion
104.

What is the use of function char *strchr(ch, c)?

A. return pointer to first occurrence of ch in c or NULL if not present
B. return pointer to first occurrence of c in ch or NULL if not present
C. return pointer to first occurrence of ch in c or ignores if not present
D. return pointer to first occurrence of cin ch or ignores if not present
Answer» C. return pointer to first occurrence of ch in c or ignores if not present
Discussion
105.

Functions whose names begin with “strn”

A. manipulates sequences of arbitrary characters
B. manipulates null-terminated sequences of characters
C. manipulates sequence of non – null characters.
D. returns a pointer to the token
Answer» D. returns a pointer to the token
Discussion
106.

What will be the output of the program ? #include int main() { char str1[] = "Hello"; char str2[10]; char *t, *s; s = str1; t = str2; while(*t=*s) *t++ = *s++; printf("%s\n", str2); return 0; }

A. Hello
B. HelloHello
C. No output
D. ello
Answer» B. HelloHello
Discussion
107.

What will be the output of the program ? #include int main() { printf(5+"IndiaBIX\n"); return 0; }

A. Error
B. IndiaBIX
C. BIX
D. None of above
Answer» D. None of above
Discussion
108.

What will be the output of the program ? #include #include int main() { char str1[5], str2[5]; int i; gets(str1); gets(str2); i = strcmp(str1, str2); printf("%d\n", i); return 0; }

A. Unpredictable integer value
B. 0
C. -1
D. Error
Answer» B. 0
Discussion
109.

What will be the output of the program ? #include int main() { char *names[] = { "Suresh", "Siva", "Sona", "Baiju", "Ritu"}; int i; char *t; t = names[3]; names[3] = names[4]; names[4] = t; for(i=0; i<=4; i++) printf("%s,", names[i]); return 0; }

A. Suresh, Siva, Sona, Baiju, Ritu
B. Suresh, Siva, Sona, Ritu, Baiju
C. Suresh, Siva, Baiju, Sona, Ritu
D. Suresh, Siva, Ritu, Sona, Baiju
Answer» C. Suresh, Siva, Baiju, Sona, Ritu
Discussion
110.

What will be the output of the program ? #include #include int main() { printf("%c\n", "abcdefgh"[4]); return 0; }

A. Error
B. d
C. e
D. abcdefgh
Answer» D. abcdefgh
Discussion
111.

What will be the output of the program in 16-bit platform (Turbo C under DOS) ? #include int main() { printf("%d, %d, %d", sizeof(3.0f), sizeof('3'), sizeof(3.0)); return 0; }

A. 8, 1, 4
B. 4, 2, 8
C. 4, 2, 4
D. 10, 3, 4
Answer» C. 4, 2, 4
Discussion
112.

If the size of pointer is 4 bytes then What will be the output of the program ? #include int main() { char *str[] = {"Frogs", "Do", "Not", "Die", "They", "Croak!"}; printf("%d, %d", sizeof(str), strlen(str[0])); return 0; }

A. 22, 4
B. 25, 5
C. 24, 5
D. 20, 2
Answer» D. 20, 2
Discussion
113.

What will be the output of the program ? #include #include int main() { char sentence[80]; int i; printf("Enter a line of text\n"); gets(sentence); for(i=strlen(sentence)-1; i >=0; i--) putchar(sentence[i]); return 0; }

A. The sentence will get printed in same order as it entered
B. The sentence will get printed in reverse order
C. Half of the sentence will get printed
D. None of above
Answer» C. Half of the sentence will get printed
Discussion
114.

What will be the output of the following program in 16 bit platform assuming that 1022 is memory address of the string "Hello1" (in Turbo C under DOS) ? #include int main() { printf("%u %s\n", &"Hello1", &"Hello2"); return 0; }

A. 1022 Hello2
B. Hello1 1022
C. Hello1 Hello2
D. 1022 1022
Answer» B. Hello1 1022
Discussion
115.

What will be the output of the program ? #include int main() { static char mess[6][30] = {"Don't walk in front of me...", "I may not follow;", "Don't walk behind me...", "Just walk beside me...", "And be my friend." }; printf("%c, %c\n", *(mess[2]+9), *(*(mess+2)+9)); return 0; }

A. t, t
B. k, k
C. n, k
D. m, f
Answer» C. n, k
Discussion
116.

What will be the output of the program ? #include int main() { int i; char a[] = "\0"; if(printf("%s", a)) printf("The string is empty\n"); else printf("The string is not empty\n"); return 0; }

A. The string is empty
B. The string is not empty
C. No output
D. 0
Answer» C. No output
Discussion
117.

What will be the output of the program ? #include int main() { char str[] = "Nagpur"; str[0]='K'; printf("%s, ", str); str = "Kanpur"; printf("%s", str+1); return 0; }

A. Kagpur, Kanpur
B. Nagpur, Kanpur
C. Kagpur, anpur
D. Error
Answer» E.
Discussion
118.

What will be the output of the program (Turbo C in 16 bit platform DOS) ? #include #include int main() { char *str1 = "India"; char *str2 = "BIX"; char *str3; str3 = strcat(str1, str2); printf("%s %s\n", str3, str1); return 0; }

A. IndiaBIX India
B. IndiaBIX IndiaBIX
C. India India
D. Error
Answer» C. India India
Discussion
119.

What will be the output of the program ? #include #include int main() { char str[] = "India\0\BIX\0"; printf("%d\n", strlen(str)); return 0; }

A. 10
B. 6
C. 5
D. 11
Answer» D. 11
Discussion
120.

What will be the output of the program ? #include int main() { char t; char *p1 = "India", *p2; p2=p1; p1 = "BIX"; printf("%s %s\n", p1, p2); return 0; }

A. India BIX
B. BIX India
C. India India
D. BIX BIX
Answer» C. India India
Discussion
121.

What will be the output of the program ? #include int main() { static char s[25] = "The cocaine man"; int i=0; char ch; ch = s[++i]; printf("%c", ch); ch = s[i++]; printf("%c", ch); ch = i++[s]; printf("%c", ch); ch = ++i[s]; printf("%c", ch); return 0; }

A. hhe!
B. he c
C. The c
D. Hhec
Answer» B. he c
Discussion
122.

What will be the output of the program ? #include int main() { printf("India", "BIX\n"); return 0; }

A. Error
B. India BIX
C. India
D. BIX
Answer» D. BIX
Discussion
123.

What will be the output of the program ? #include int main() { int i; char a[] = "\0"; if(printf("%s", a)) printf("The string is not empty\n"); else printf("The string is empty\n"); return 0; }

A. The string is not empty
B. The string is empty
C. No output
D. 0
Answer» C. No output
Discussion
124.

If the size of pointer is 32 bits What will be the output of the program ? #include int main() { char a[] = "Visual C++"; char *b = "Visual C++"; printf("%d, %d\n", sizeof(a), sizeof(b)); printf("%d, %d", sizeof(*a), sizeof(*b)); return 0; }

A. 10, 22, 2
B. 10, 41, 2
C. 11, 41, 1
D. 12, 22, 2
Answer» D. 12, 22, 2
Discussion
125.

What will be the output of the program ? #include #include int main() { static char s[] = "Hello!"; printf("%d\n", *(s+strlen(s))); return 0; }

A. 8
B. 0
C. 16
D. Error
Answer» C. 16
Discussion
126.

What will be the output of the program ? #include int main() { char str[] = "India\0BIX\0"; printf("%d\n", sizeof(str)); return 0; }

A. 10
B. 6
C. 5
D. 11
Answer» E.
Discussion
127.

What will be the output of the program ? #include int main() { char str1[] = "Hello"; char str2[] = "Hello"; if(str1 == str2) printf("Equal\n"); else printf("Unequal\n"); return 0; }

A. Equal
B. Unequal
C. Error
D. None of above
Answer» C. Error
Discussion
128.

What will be the output of the program ? #include int main() { char str[7] = "IndiaBIX"; printf("%s\n", str); return 0; }

A. Error
B. IndiaBIX
C. Cannot predict
D. None of above
Answer» D. None of above
Discussion
129.

What will be the output of the program ? #include int main() { char str = "IndiaBIX"; printf("%s\n", str); return 0; }

A. Error
B. IndiaBIX
C. Base address of str
D. No output
Answer» B. IndiaBIX
Discussion
130.

What will be the output of the program ? #include int main() { char str[25] = "IndiaBIX"; printf("%s\n", &str+2); return 0; }

A. Garbage value
B. Error
C. No output
D. diaBIX
Answer» B. Error
Discussion
131.

Which of the following statements are correct about the below declarations? char *p = "Sanjay";char a[] = "Sanjay"; 1: There is no difference in the declarations and both serve the same purpose. 2: p is a non-const pointer pointing to a non-const string, whereas a is a const pointer pointing to a non-const pointer. 3: The pointer p can be modified to point to another string, whereas the individual characters within array a can be changed. 4: In both cases the '\0' will be added at the end of the string "Sanjay".

A. 1, 2
B. 2, 3, 4
C. 3, 4
D. 2, 3
Answer» C. 3, 4
Discussion
132.

What will be the output of the program ? #include int main() { printf(5+"Good Morning\n"); return 0; }

A. Good Morning
B. Good
C. M
D. Morning
Answer» E.
Discussion
133.

Which of the following function is correct that finds the length of a string?

A. int xstrlen(char *s) { int length=0; while(*s!='\0') { length++; s++; } return (length); }
B. int xstrlen(char s) { int length=0; while(*s!='\0') length++; s++; return (length); }
C. int xstrlen(char *s) { int length=0; while(*s!='\0') length++; return (length); }
D. int xstrlen(char *s) { int length=0; while(*s!='\0') s++; return (length); }
Answer» B. int xstrlen(char s) { int length=0; while(*s!='\0') length++; s++; return (length); }
Discussion
134.

What will be the output of the program ? #include #include int main() { char str[] = "India\0\BIX\0"; printf("%s\n", str); return 0; }

A. BIX
B. India
C. India BIX
D. India\0BIX
Answer» C. India BIX
Discussion
135.

Is there any difference between the two statements? char *ch = "IndiaBIX";char ch[] = "IndiaBIX";

A. Yes
B. No
Answer» B. No
Discussion
136.

If char=1, int=4, and float=4 bytes size, What will be the output of the program ? #include int main() { char ch = 'A'; printf("%d, %d, %d", sizeof(ch), sizeof('A'), sizeof(3.14f)); return 0; }

A. 1, 2, 4
B. 1, 4, 4
C. 2, 2, 4
D. 2, 4, 8
Answer» C. 2, 2, 4
Discussion
137.

What will be the output of the program ? #include int main() { char p[] = "%d\n"; p[1] = 'c'; printf(p, 65); return 0; }

A. A
B. a
C. c
D. 65
Answer» B. a
Discussion
138.

Which of the following statements are correct ? 1: A string is a collection of characters terminated by '\0'. 2: The format specifier %s is used to print a string. 3: The length of the string can be obtained by strlen(). 4: The pointer CANNOT work on string.

A. 1, 2
B. 1, 2, 3
C. 2, 4
D. 3, 4
Answer» C. 2, 4
Discussion
139.

What will be the output of the program ? #include #include int main() { printf("%d\n", strlen("123456")); return 0; }

A. 6
B. 12
C. 7
D. 2
Answer» B. 12
Discussion
140.

For the following statements will arr[3] and ptr[3] fetch the same character? char arr[] = "IndiaBIX";char *ptr = "IndiaBIX";

A. Yes
B. No
Answer» B. No
Discussion
141.

What will be the output of the program ? #include #include int main() { static char str1[] = "dills"; static char str2[20]; static char str3[] = "Daffo"; int i; i = strcmp(strcat(str3, strcpy(str2, str1)), "Daffodills"); printf("%d\n", i); return 0; }

A. 0
B. 1
C. 2
D. 4
Answer» B. 1
Discussion
142.

What will be the output of the program in Turbo C? #include int main() { char str[10] = "India"; str[6] = "BIX"; printf("%s\n", str); return 0; }

A. India BIX
B. BIX
C. India
D. Error
Answer» E.
Discussion
143.

What will be the output of the program If characters 'a', 'b' and 'c' enter are supplied as input? #include int main() { void fun(); fun(); printf("\n"); return 0; } void fun() { char c; if((c = getchar())!= '\n') fun(); printf("%c", c); }

A. abc abc
B. bca
C. Infinite loop
D. cba
Answer» E.
Discussion
144.

What will be the output of the program ? #include void swap(char *, char *); int main() { char *pstr[2] = {"Hello", "IndiaBIX"}; swap(pstr[0], pstr[1]); printf("%s\n%s", pstr[0], pstr[1]); return 0; } void swap(char *t1, char *t2) { char *t; t=t1; t1=t2; t2=t; }

A. IndiaBIXHello
B. Address of "Hello" and "IndiaBIX"
C. HelloIndiaBIX
D. IelloHndiaBIX
Answer» D. IelloHndiaBIX
Discussion
145.

Which of the following statements are correct about the program below? #include int main() { char str[20], *s; printf("Enter a string\n"); scanf("%s", str); s=str; while(*s != '\0') { if(*s >= 97 && *s <= 122) *s = *s-32; s++; } printf("%s",str); return 0; }

A. The code converts a string in to an integer
B. The code converts lower case character to upper case
C. The code converts upper case character to lower case
D. Error in code
Answer» C. The code converts upper case character to lower case
Discussion
146.

Will the program compile successfully? #include int main() { char a[] = "India"; char *p = "BIX"; a = "BIX"; p = "India"; printf("%s %s\n", a, p); return 0; }

A. Yes
B. No
C. Yes
D. No
Answer» C. Yes
Discussion
147.

Which of the following function is more appropriate for reading in a multi-word string?

A. printf();
B. scanf();
C. gets();
D. puts();
Answer» D. puts();
Discussion
148.

How will you print \n on the screen?

A. printf("\n");
B. echo "\\n";
C. printf('\n');
D. printf("\\n");
Answer» E.
Discussion
149.

If the two strings are identical, then strcmp() function returns

A. -1
B. 1
C. 0
D. Yes
Answer» D. Yes
Discussion
150.

What will be the output of the program ? #include #include int main() { char str1[20] = "Hello", str2[20] = " World"; printf("%s\n", strcpy(str2, strcat(str1, str2))); return 0; }

A. Hello
B. World
C. Hello World
D. WorldHello
Answer» D. WorldHello
Discussion