You want to create a constant array of 3 integers in C that cannot be modified after initialization. Which of the following declarations achieves this correctly?

hard📝 Application Q15 of 15

C - Variables and Data Types

Aint arr[3] = {1, 2, 3};

Bint const *arr = {1, 2, 3};

C#define arr {1, 2, 3}

Dconst int arr[3] = {1, 2, 3};

Step-by-Step Solution

Solution:

Step 1: Understand const array declaration
Declaring an array with const int arr[3] means the elements cannot be changed after initialization.
Step 2: Check each option
int arr[3] = {1, 2, 3}; declares a normal array, elements can be changed. const int arr[3] = {1, 2, 3}; declares a constant array correctly. #define arr {1, 2, 3} uses #define incorrectly for array. int const *arr = {1, 2, 3}; declares a pointer to const int, but initialization is invalid.
Final Answer:
const int arr[3] = {1, 2, 3}; -> Option D
Quick Check:
const array elements cannot change [OK]

Quick Trick: Use const before type for constant arrays [OK]

Common Mistakes:

Using #define for arrays
Declaring non-const arrays
Incorrect pointer initialization

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You want to create a constant array of 3 integers in C that cannot be modified after initialization. Which of the following declarations achieves this correctly?

Step 1: Understand const array declaration

Step 2: Check each option

Final Answer:

Quick Check:

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