Quiz for Pointers and strings

Q1: Which operator is used to access the value pointed to by a pointer?

A. * B. & C. -> D. .

Q2: Which of the following correctly declares a pointer to a string in C?

A. char *str; B. string str; C. char str*; D. ptr char str;

Q3: If char *p = "Hello"; what does p point to?

A. The first character of the string B. The entire string object C. A copy of the string D. NULL

Q4: Which function is used to get the length of a string?

A. strlen() B. sizeof() C. strlength() D. len()

Q5: What is the type of string literals in C?

A. Array of char B. Pointer to char C. Array of const char D. Pointer to const char

Q6: Which statement copies one string into another?

A. strcpy(dest, src); B. dest = src; C. copystring(dest, src); D. copy(dest, src);

Q7: If p is a pointer to a string, p+1 will point to?

A. Next string B. Next character C. Previous character D. Same character

Q8: Which library must be included for string functions?

A. string.h B. strings.h C. stdlib.h D. stdio.h

Q9: What is the output of printf("%s", "Hello"+2);

A. Hello B. llo C. lloHello D. He

Q10: How is a string stored in memory in C?

A. Null terminated char array B. Length-prefixed char array C. Pointer to integer D. Character linked list

Q11: Which function compares two strings?

A. strcmp() B. strcomp() C. compare() D. stringcmp()

Q12: What is the output of char str[] = "C"; printf("%d", sizeof(str));

A. 1 B. 2 C. 3 D. Depends on compiler

Q13: Which function concatenates two strings?

A. strcat() B. append() C. concat() D. join()

Q14: If char *s = "abc"; s[1] = "d"; what happens?

A. Replaces b with d B. Compilation error C. Runtime error D. Undefined behavior

Q15: Which of the following is true about pointers to strings?

A. They can be reassigned to another string B. They cannot be dereferenced C. They store a copy of the string D. They are not allowed in C

Q16: In C, char *s = "text"; sizeof(s) returns?

A. 4 or 8 B. Length of string C. Length+1 D. Compiler dependent

Q17: Which escape sequence represents a null character?

A. \n B. \t C. \0 D. \NULL

Q18: Which function is used to find a character in a string?

A. strchr() B. findchar() C. index() D. charfind()

Q19: What will printf("%c", *("world"+3)); print?

A. r B. l C. d D. o

Q20: If char s[] = "hi"; char *p = s; p[1] = "o"; result?

A. ho B. io C. oi D. oo