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1Z0-811 Arrays and Methods Practice Question

Which two statements about the Arrays class are true? (Choose two.)

⚠ Common exam trap

The 1Z0-811 exam often tests the misconception that `Arrays.binarySearch()` works on any array, but it requires a sorted array; also, candidates may confuse `Arrays.copyOf()` with a deep copy, but it only performs a shallow copy.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The Arrays class provides a method to fill an array with a specific value.

The `Arrays.fill()` method allows you to assign a specific value to every element of an array, or to a specified range within the array. This is a static utility method provided by the `java.util.Arrays` class, and it works for both primitive and object arrays.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
The Arrays class provides a method to sort only arrays of primitive types.
Why it's wrong here
sort() works on both primitive and object arrays.
✓
The Arrays class provides a method to fill an array with a specific value.
Why this is correct
Arrays.fill() sets all elements to the specified value.
✗
The Arrays class provides a method to perform binary search on any array.
Why it's wrong here
binarySearch requires a sorted array; 'any array' is not accurate.
✗
The Arrays class provides a method to deep copy an array.
Why it's wrong here
Arrays.copyOf() performs shallow copy, not deep copy.
✓
The Arrays class provides a method to convert an array to a List.
Why this is correct
Arrays.asList() returns a List backed by the array.

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1Z0-811 Arrays and Methods Practice Question

Why each option matters

Option-by-option breakdown

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