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MCQOPTIONS
This section includes 93 Mcqs, each offering curated multiple-choice questions to sharpen your Strings knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 | |
| 2. |
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 | |
| 3. |
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. | |
| Answer» D. | |
| 4. |
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. | |
| 5. |
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 | |
| 6. |
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 | |
| 7. |
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 | |
| 8. |
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. | |
| 9. |
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 | |
| 10. |
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 | |
| 11. |
What is the output of following program? # include int main() { char str1[] = "GeeksQuiz"; char str2[] = {'G', 'e', 'e', 'k', 's', 'Q', 'u', 'i', 'z'}; int n1 = sizeof(str1)/sizeof(str1[0]); int n2 = sizeof(str2)/sizeof(str2[0]); printf("n1 = %d, n2 = %d", n1, n2); return 0; } |
| A. | n1 = 10, n2 = 9 |
| B. | n1 = 10, n2 = 10 |
| C. | n1 = 9, n2 = 9 |
| D. | n1 = 9, n2 = 10 |
| Answer» B. n1 = 10, n2 = 10 | |
| 12. |
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. | -1 |
| C. | Error |
| Answer» B. -1 | |
| 13. |
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 |
| Answer» C. No output | |
| 14. |
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 | |
| 15. |
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 | |
| 16. |
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 | |
| 17. |
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 | |
| 18. |
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. | |
| 19. |
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 | |
| 20. |
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 | |
| 21. |
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 | |
| 22. |
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. | |
| 23. |
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 | |
| 24. |
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 |
| Answer» C. No output | |
| 25. |
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 | |
| 26. |
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 | |
| 27. |
What will be the output of the following C code? const char pla[] = "string1"; const char src[] = "string2"; printf("Before memmove place= %s, src = %s n", pla, src); memmove(pla, src, 7); printf("After memmove place = %s, src = %s n", pla, src); |
| A. | Before memmove place= string1, src = string2 After memmove place = string2, src = string2 |
| B. | Before memmove place = string2, src = string2 After memmove place= string1, src = string2 |
| C. | Before memmove place = string2, src = string1 After memmove place= string2, src =string2 |
| D. | Before memmove place= string1, src = string2 After memmove place=string1, src = string1 |
| Answer» B. Before memmove place = string2, src = string2 After memmove place= string1, src = string2 | |
| 28. |
Assume that a character takes 1 byte. Output of following program? #include int main() { char str[20] = "GeeksQuiz"; printf ("%d", sizeof(str)); return 0; } |
| A. | 9 |
| B. | 10 |
| C. | 20 |
| D. | Garbage Value |
| Answer» D. Garbage Value | |
| 29. |
Output of following program #include int fun(char *p) { if (p == NULL || *p == ' 0') return 0; int current = 1, i = 1; while (*(p+current)) { if (p[current] != p[current-1]) { p[i] = p[current]; i++; } current++; } *(p+i)=' 0'; return i; } int main() { char str[] = "geeksskeeg"; fun(str); puts(str); return 0; } |
| A. | gekskeg |
| B. | geeksskeeg |
| C. | geeks |
| D. | Garbage Values |
| Answer» B. geeksskeeg | |
| 30. |
Predict the output of the following program: #include int main() { char str[] = "%d %c", arr[] = "GeeksQuiz"; printf(str, 0[arr], 2[arr + 3]); return 0; } |
| A. | G Q |
| B. | 71 81 |
| C. | 71 Q |
| D. | Compile-time error |
| Answer» D. Compile-time error | |
| 31. |
Output? int main() { char a[2][3][3] = {'g','e','e','k','s','q','u','i','z'}; printf("%s ", **a); return 0; } |
| A. | Compiler Error |
| B. | geeksquiz followed by garbage characters |
| C. | geeksquiz |
| D. | Runtime Error |
| Answer» D. Runtime Error | |
| 32. |
#include void my_toUpper(char* str, int index) { *(str + index) &= ~32; } int main() { char* arr = "geeksquiz"; my_toUpper(arr, 0); my_toUpper(arr, 5); printf("%s", arr); return 0; } |
| A. | GeeksQuiz |
| B. | geeksquiz |
| C. | Compiler dependent |
| Answer» D. | |
| 33. |
In below program, what would you put in place of ? to print Quiz ? #include int main() { char arr[] = "GeeksQuiz"; printf("%s", ?); return 0; } |
| A. | arr |
| B. | (arr+5) |
| C. | (arr+4) |
| D. | Not possible |
| Answer» C. (arr+4) | |
| 34. |
What does the following fragment of C-program print? char c[] = "GATE2011"; char *p =c; printf("%s", p + p[3] - p[1]) ; |
| A. | GATE2011 |
| B. | E2011 |
| C. | 2011 |
| D. | 011 |
| Answer» D. 011 | |
| 35. |
Predict the output? #include int fun(char *str1) { char *str2 = str1; while(*++str1); return (str1-str2); } int main() { char *str = "GeeksQuiz"; printf("%d", fun(str)); return 0; } |
| A. | 10 |
| B. | 9 |
| C. | 8 |
| D. | Random Number |
| Answer» C. 8 | |
| 36. |
What is the output of following program? #include void swap(char *str1, char *str2) { char *temp = str1; str1 = str2; str2 = temp; } int main() { char *str1 = "Geeks"; char *str2 = "Quiz"; swap(str1, str2); printf("str1 is %s, str2 is %s", str1, str2); return 0; } |
| A. | str1 is Quiz, str2 is Geeks |
| B. | str1 is Geeks, str2 is Quiz |
| C. | |
| D. | D. |
| E. | |
| Answer» C. | |
| 37. |
NULL is the macro defined in the header string. h. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 38. |
Which of the following is the variable type defined in header string. h? |
| A. | sizet |
| B. | size |
| C. | size_t |
| D. | size-t |
| Answer» D. size-t | |
| 39. |
What is the function of strcoll()? |
| A. | compares the string, result is dependent on the LC_COLLATE |
| B. | copies the string, result is dependent on the LC_COLLATE |
| C. | compares the string, result is not dependent on the LC_COLLATE |
| D. | copies the string, result is not dependent on the LC_COLLATE |
| Answer» B. copies the string, result is dependent on the LC_COLLATE | |
| 40. |
The ______ function appends not more than n characters. |
| A. | strcat() |
| B. | strcon() |
| C. | strncat() |
| D. | memcat() |
| Answer» D. memcat() | |
| 41. |
What is the prototype of strcoll() function? |
| A. | int strcoll(const char *s1,const char *s2) |
| B. | int strcoll(const char *s1) |
| C. | int strcoll(const *s1,const *s2) |
| D. | int strcoll(const *s1) |
| Answer» B. int strcoll(const char *s1) | |
| 42. |
What will strcmp() function do? |
| A. | compares the first n characters of the object |
| B. | compares the string |
| C. | undefined function |
| D. | copies the string |
| Answer» C. undefined function | |
| 43. |
Which function will you choose to join two words? |
| A. | strcpy() |
| B. | strcat() |
| C. | strncon() |
| D. | memcon() |
| Answer» C. strncon() | |
| 44. |
Which among the following is Copying function? |
| A. | memcpy() |
| B. | strcopy() |
| C. | memcopy() |
| D. | strxcpy() |
| Answer» B. strcopy() | |
| 45. |
#include int main() { char *str1 = "GeeksQuiz"; char str2[] = "GeeksQuiz"; printf("sizeof(str1) = %d, sizeof(str2) = %d", sizeof(str1), sizeof(str2)); return 0; } |
| A. | sizeof(str1) = 10, sizeof(str2) = 10 |
| B. | sizeof(str1) = 4, sizeof(str2) = 10 |
| C. | sizeof(str1) = 4, sizeof(str2) = 4 |
| D. | sizeof(str1) = 10, sizeof(str2) = 4 |
| Answer» C. sizeof(str1) = 4, sizeof(str2) = 4 | |
| 46. |
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 | |
| 47. |
What will be the output of the following C code? const char str1[] = "abcdef"; const char str2[] = "fgha"; char *mat; mat= strpbrk(str1, str2); if(mat) printf("First matching character: %c n", *mat); else printf("Character not found"); |
| A. | g |
| B. | a |
| C. | h |
| D. | f |
| Answer» E. | |
| 48. |
What will be the output of the following C code? char str1[] = "Helloworld "; char str2[] = "Hello"; len = strspn(str1, str2); printf("Length of initial segment matching %d n", len ); |
| A. | 6 |
| B. | 5 |
| C. | 4 |
| D. | no match |
| Answer» C. 4 | |
| 49. |
Which of the following is the right syntax to copy n characters from the object pointed to by s2 into the object pointed to by s1? |
| A. | void *memcpy(void *s1,const void *s2,size_t n); |
| B. | void *memcpy(void *s2, const void *s1, size_t n); |
| C. | void memcpy(void *s1,const void *s2, size_t n); |
| D. | void memcpy(void *s2,const void *s1,size_t n); |
| Answer» B. void *memcpy(void *s2, const void *s1, size_t n); | |
| 50. |
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 | |