Question

In the implementation of MyArrayList, which of the following are true?

a) MyArrayList is a built-in Java class.
b) It is resizable dynamically.
c) Elements in MyArrayList are accessed using indexes.
d) MyArrayList can only store primitive data types.

Answer 1

MyArrayList is not a built-in Java class, but likely signifies a custom class similar to ArrayList. It should indeed be dynamically resizable and allow index-based access to elements. Contrary to the claim, it would be capable of storing objects, not just primitive data types.

Step-by-step explanation:

In the context of Java programming, MyArrayList suggests a custom implementation of an array list, akin to the ArrayList provided by Java's standard library. Addressing the points:

• a) MyArrayList is a built-in Java class. This statement is not true. MyArrayList appears to be a custom class, likely mimicking the functionality of the built-in ArrayList.
• b) It is resizable dynamically. If designed to resemble ArrayList, then yes, it should be dynamically resizable, allowing elements to be added or removed and the list would adjust its size accordingly.
• c) Elements in MyArrayList are accessed using indexes. This is a characteristic of list structures in Java and if MyArrayList is to behave like ArrayList, it likely allows index-based access.
• d) MyArrayList can only store primitive data types. This statement is incorrect. In Java, lists typically store objects, not primitives. If MyArrayList mimics ArrayList, it would be able to store any type of object, including the wrapper classes for primitives.