Colruyt Group Automation Engineer Interview Questions and Answers

Arrays are a data structure that stores a collection of elements of the same data type in a contiguous memory location.

• Arrays are used to store multiple values in a single variable.

• Elements in an array are accessed by their index position.

• Arrays can be of fixed size or dynamic size.

• Example: String[] names = {"Alice", "Bob", "Charlie"};

ArrayList is a dynamic array in Java that can grow or shrink in size as needed.

• ArrayList is a class in Java that implements the List interface.

• It allows for dynamic resizing, unlike regular arrays which have a fixed size.

• Elements in an ArrayList can be accessed using their index.

• Example: ArrayList names = new ArrayList();

• names.add("Alice"); names.add("Bob");