Arrays and Strings – Multiple Choice Questions (MCQs)

1. 1. What is an array in C?

   • A. A single variable that can store multiple values of different data types
   • B. A collection of variables of the same data type stored in contiguous memory locations
   • C. A user-defined data type
   • D. A pointer to a memory location

2. 2. How do you declare an integer array of size 5 in C?

   • A. int arr;
   • B. array[5] int;
   • C. int arr[5];
   • D. array int[5];

3. 3. What is the index of the first element in an array in C?

   • A. 0
   • B. 1
   • C. -1
   • D. Depends on the compiler

4. 4.

   • A. arr[3]
   • B. arr(3)
   • C. arr{3}
   • D. arr[2]

5. 5. What is array initialization in C?

   • A. Assigning a size to the array
   • B. Declaring the array name
   • C. Assigning initial values to the elements of the array
   • D. Accessing elements of the array

6. 6. What is a string in C?

   • A. A character array terminated by a null character ('\0')
   • B. A data type to store text
   • C. A collection of characters
   • D. A pointer to a character

7. 7. How do you declare a character array to store a string of maximum length 10 in C?

   • A. char str;
   • B. string str[10];
   • C. char str[11];
   • D. char str[10];

8. 8. What is the null terminator in a C string?

   • A. \n'
   • B. \0'
   • C. '
   • D. EOF

9. 9. Which standard library function is used to calculate the length of a string in C?

   • A. strlen()
   • B. length()
   • C. sizeof()
   • D. strlength()

10. 10. Which standard library function is used to copy one string to another in C?

    • A. strcpy()
    • B. strcopy()
    • C. memcpy()
    • D. copy()

11. 11. Which standard library function is used to concatenate two strings in C?

    • A. strcat()
    • B. strncat()
    • C. append()
    • D. concat()

12. 12. Which standard library function is used to compare two strings in C?

    • A. strcmp()
    • B. compare()
    • C. strcomp()
    • D. equals()