Strings problems
- 1. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { char str[] = "India\0\CURIOUSTAB\0"; printf("%d\n", strlen(str)); return 0; }
Options- A. 10
- B. 6
- C. 5
- D. 11 Discuss
Correct Answer: 5
Explanation:
Therefore, strlen(str) becomes strlen("India") contains 5 characters. A string is a collection of characters terminated by '\0'.
The output of the program is "5".
- 2. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { char str[] = "India\0\CURIOUSTAB\0"; printf("%s\n", str); return 0; }
Options- A. CURIOUSTAB
- B. India
- C. India CURIOUSTAB
- D. India\0CURIOUSTAB Discuss
Correct Answer: India
Explanation:
Step 1: char str[] = "India\0\CURIOUSTAB\0"; The variable str is declared as an array of characters and initialized with value "India"
Step 2: printf("%s\n", str); It prints the value of the str.
The output of the program is "India".
- 3. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { char str1[5], str2[5]; int i; gets(str1); gets(str2); i = strcmp(str1, str2); printf("%d\n", i); return 0; }
Options- A. Unpredictable integer value
- B. 0
- C. -1
- D. Error Discuss
Correct Answer: Unpredictable integer value
Explanation:
The gets(str1) read the input string from user and store in variable str1.
The gets(str2) read the input string from user and store in variable str2.
The code i = strcmp(str1, str2); The strcmp not only returns -1, 0 and +1, but also other negative or positive values. So the value of i is "unpredictable integer value".
printf("%d\n", i); It prints the value of variable i.
- 4. What will be the output of the program?
#include<stdio.h> int main() { printf("India", "CURIOUSTAB\n"); return 0; }
Options- A. Error
- B. India CURIOUSTAB
- C. India
- D. CURIOUSTAB Discuss
Correct Answer: India
Explanation:
- 5. What will be the output of the program?
#include<stdio.h> 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; }
Options- A. Suresh, Siva, Sona, Baiju, Ritu
- B. Suresh, Siva, Sona, Ritu, Baiju
- C. Suresh, Siva, Baiju, Sona, Ritu
- D. Suresh, Siva, Ritu, Sona, Baiju Discuss
Correct Answer: Suresh, Siva, Sona, Ritu, Baiju
Explanation:
Step 2: int i; The variable i is declared as an integer type.
Step 3: char *t; The variable t is declared as pointer to a string.
Step 4: t = names[3]; names[3] = names[4]; names[4] = t; These statements the swaps the 4 and 5 element of the array names.
Step 5: for(i=0; i<=4; i++) printf("%s,", names[i]); These statement prints the all the value of the array names.
Hence the output of the program is "Suresh, Siva, Sona, Ritu, Baiju".
- 6. What will be the output of the program?
#include<stdio.h> 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; }
Options- A. hhe!
- B. he c
- C. The c
- D. Hhec Discuss
Correct Answer: hhe!
- 7. What will be the output of the program If characters 'a', 'b' and 'c' enter are supplied as input?
#include<stdio.h> int main() { void fun(); fun(); printf("\n"); return 0; } void fun() { char c; if((c = getchar())!= '\n') fun(); printf("%c", c); }
Options- A. abc abc
- B. bca
- C. Infinite loop
- D. cba Discuss
Correct Answer: cba
Explanation:
Step 2: fun(); The function fun() is called here.
The function fun() gets a character input and the input is terminated by an enter key(New line character). It prints the given character in the reverse order.
The given input characters are "abc"
Output: cba
- 8. What will be the output of the program?
#include<stdio.h> #include<string.h> 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; }
Options- 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 Discuss
Correct Answer: The sentence will get printed in reverse order
- 9. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { printf("%c\n", "abcdefgh"[4]); return 0; }
Options- A. Error
- B. d
- C. e
- D. abcdefgh Discuss
Correct Answer: e
Explanation:
Hence the output is 'e'.
- 10. What will be the output of the program?
#include<stdio.h> int main() { char str[25] = "CuriousTab"; printf("%s\n", &str+2); return 0; }
Options- A. Garbage value
- B. Error
- C. No output
- D. diaCURIOUSTAB Discuss
Correct Answer: Garbage value
Explanation:
Step 2: printf("%s\n", &str+2);
=> In the printf statement %s is string format specifier tells the compiler to print the string in the memory of &str+2
=> &str is a location of string "CuriousTab". Therefore &str+2 is another memory location.
Hence it prints the Garbage value.
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