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1Z0-811 Arrays and Methods Practice Question

Which three statements about arrays are correct? (Choose three.)

⚠ Common exam trap

Candidates often confuse the compile-time constant requirement for array lengths with the fact that the length can be a runtime expression, leading them to incorrectly select option C as correct.

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 are objects in Java.

In Java, arrays are objects that are dynamically created and can be assigned to variables of type Object, cloned via the clone() method, and have a length field (not a method). They inherit from java.lang.Object and are treated as reference types, even when they store primitive values.

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 size of an array can change after creation.
Why it's wrong here
Arrays have a fixed length; cannot be resized.
✓
Arrays are objects in Java.
Why this is correct
Arrays inherit from Object and have methods like clone().
✗
The length of an array must be specified at compile time with a constant expression.
Why it's wrong here
Length can be specified with a variable (e.g., new int[n]), determined at runtime.
✓
Arrays can store both primitive and object types.
Why this is correct
For example, int[] stores primitives, String[] stores objects.
✓
Array indices start at 0.
Why this is correct
Standard Java array indexing.

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1Z0-811 Arrays and Methods Practice Question

Why each option matters

Option-by-option breakdown

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