Which statement about Array and ArrayList is true?

• A. Array can increase in size dynamically
• B. Array can store only objects
• C. ArrayList is a fixed length structure
• D. Array can store both primitive and object types

Answer: (D)

The statement that an array can store both primitive and object types is accurate. In many programming languages, such as Java and C#, arrays are versatile data structures that can hold a collection of values. They can contain primitive data types like integers, characters, and floats, as well as object types like strings and user-defined classes.

For instance, in Java, you can create an integer array to hold int values or a string array to hold String objects. This characteristic makes arrays a flexible tool for managing collections of data of various types within a program.

The other options illustrate misconceptions about arrays and their capabilities. Arrays cannot dynamically increase in size; their size is fixed upon creation. While arrays can store objects, they are not limited to doing so; they can also hold primitive types. Additionally, an ArrayList is not a fixed-length structure; rather, it is a dynamic collection that can grow and shrink as elements are added or removed.