Here is a listing of C Objective Questions on “String Operations” along with answers, explanations and/or solutions:
1. What type of return-type used in String operations?
a) void only
b) void and (char *) only
c) void and int only
d) void, int and (char *) only
Answer: d
Clarification: None.
2. String operation such as strcat(s, t), strcmp(s, t), strcpy(s, t) and strlen(s) heavily rely upon.
a) Presence of NULL character
b) Presence of new-line character
c) Presence of any escape sequence
d) None of the mentioned
Answer: a
Clarification: None.
3. Which pre-defined function returns a pointer to the last occurence of a character in a string?
a) strchr(s, c);
b) strrchr(s, c);
c) strlchr(s, c);
d) strfchr(s, c);
Answer: b
Clarification: None.
4. Which of the following function compares 2 strings with case-insensitively?
a) strcmp(s, t)
b) strcmpcase(s, t)
c) strcasecmp(s, t)
d) strchr(s, t)
Answer: c
Clarification: None.
5. What will be the value of var for the following C statement?
var = strcmp("Hello", "World");
a) -1
b) 0
c) 1
d) strcmp has void return-type
Answer: a
Clarification: None.
6. What will be the output of the following C code?
-
#include -
int main()
-
{ -
char str[10] = "hello";
-
char *p = strrchr(str, 'l');
-
printf("%cn", *(++p));
-
}
a) l
b) o
c) e
d) Compilation error
Answer: b
Clarification: None.