The word “array” is defined as a data structure, consisting of a collection of elements ... in Java is the map. A map is an associative array that uses key/value pairs that do not change.

You have been given an array/list(ARR) of size N. You need to swap every pair of alternate elements in the array/list. You don't need to print or return anything, just change in the input array itself ...

You can’t change the size of an array in Java once the array is initialized. How is a Java array’s size and length used in a loop? A common example of the Java array length property being used in code ...