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Analyze the following code and choose the correct answer.int[] arr = new int[5];arr = new int[6];

Question

Analyze the following code and choose the correct answer.

int[] arr = new int[5];
arr = new int[6];
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Solution

Code Analysis

  1. Understanding the Code
    The code initializes an integer array named arr with a size of 5. The second line then reassigns arr to a new integer array with a size of 6.

  2. Key Concepts

    • In Java, arrays are fixed in size once they are created. This means that the length of an array cannot be changed after its initial creation.
    • Assigning a new array to the variable arr means that the previous array (of size 5) is now a candidate for garbage collection, as there are no references pointing to it.
  3. Detailed Explanation

    • int[] arr = new int[5]; creates an array that can hold 5 integers. Initially, all values in the array are set to 0 by default.
    • arr = new int[6]; creates a new array that can hold 6 integers. This effectively creates an entirely new array in memory, and the reference arr is updated to point to this new array. The original array of 5 integers is no longer referenced and can be garbage collected.
  4. Implications
    The original array is lost upon the reassignment, meaning any values that were stored in that 5-sized array cannot be accessed anymore.

Final Summary

The code correctly initializes and reassigns an array, but it effectively loses the reference to the initial 5-element array. The final state will be that arr references a new array of size 6, while the original array (of size 5) is eligible for garbage collection.

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