Working with Arrays and Collections →easyMultiple ChoiceObjective-mapped

1Z0-829 Working with Arrays and Collections Practice Question

Which of the following correctly converts an array of strings to a List?

⚠ Common exam trap

Candidates often confuse `Arrays.asList()` with creating a fully mutable `ArrayList`, or they think `List.of()` returns a mutable list, but the exam specifically tests the fixed-size, array-backed nature of `Arrays.asList()` versus the immutability of `List.of()`.

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

✓

Arrays.asList(array) returns a fixed-size list backed by the array.

`Arrays.asList(array)` returns a fixed-size list backed by the original array, meaning changes to the list (like `set`) reflect in the array, but structural modifications (like `add` or `remove`) throw `UnsupportedOperationException`. This is the standard, exam-relevant way to convert an array to a List in Java.

Answer analysis

Option-by-option breakdown

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

✗
Collections.toList(array) converts the array.
Why it's wrong here
No such method exists in Collections class.
✗
List.of(array) returns a mutable list.
Why it's wrong here
List.of returns an immutable list; any attempt to modify it throws UnsupportedOperationException.
✓
Arrays.asList(array) returns a fixed-size list backed by the array.
Why this is correct
Arrays.asList returns a list view of the array, fixed-size and mutable via set operations.
✗
Arrays.asList(array) returns a new ArrayList with a copy of the elements.
Why it's wrong here
It returns a List view, not a new ArrayList; modifications to the list affect the array.

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1Z0-829 Working with Arrays and Collections Practice Question

Why each option matters

Option-by-option breakdown

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