21 - FALSE
23 - TRUE
25 - Yes, Node should be a public class . A Node provides a generic node for a linked list. Each node contains a piece of data (which is a reference to an object) and a link (which is a reference to the next node of the list). The reference stored in a node can be null. So, if it is not public we cannot create a Node class as it cannot be accessed publicly.
26 - clear() method only clears all the element from the list and not deletes the list.
The simplest and shortest method to implement the clear() method is - list.clear();
27 - (c) It avoids moving data when adding or removing bag entries.
28 - (a) at a rondom place. (we can insert it at anywherein the list)
29 - (b) inner class
30 - (a) all options are valid
please answer all questions thanks Question 21 Not yet In a linked-node implementation of a ADT,...
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