Download Android App in your Android Device from Google Play Store
- Search for "Withoutbook Practice Exam Test" in Mobile/Tablet Play Store
Practice InterviewNew Search by Name or Email

Exams Attended

Make Homepage

Bookmark this page

Subscribe Email Address

Data Structures Interview Questions and Answers

Ques 41. Why is the isEmpty() member method called?

Ans. The isEmpty() member method is called within the dequeue process to determine if there is an item in the queue to be removed i.e. isEmpty() is called to decide whether the queue has at least one element. This method is called by the dequeue() method before returning the front element.

Is it helpful? Add Comment View Comments
Ques 42. How is the front of the queue calculated ?
Ans. The front of the queue is calculated by front = (front+1) % size.
Is it helpful? Add Comment View Comments
Ques 43. What does each entry in the Link List called?
Ans. Each entry in a linked list is called a node. Think of a node as an entry that has three sub entries. One sub entry contains the data, which may be one attribute or many attributes. Another points to the previous node, and the last points to the next node. When you enter a new item on a linked list, you allocate the new node and then set the pointers to previous and next nodes.
Is it helpful? Add Comment View Comments
Ques 44. What is Linked List ?
Ans. Linked List is one of the fundamental data structures. It consists of a sequence of? nodes, each containing arbitrary data fields and one or two (?links?) pointing to the next and/or previous nodes. A linked list is a self-referential datatype because it contains a pointer or link to another data of the same type. Linked lists permit insertion and removal of nodes at any point in the list in constant time, but do not allow random access.
Is it helpful? Add Comment View Comments
Ques 45. What member function places a new node at the end of the linked list?
Ans. The appendNode() member function places a new node at the end of the linked list. The appendNode() requires an integer representing the current data of the node.
Is it helpful? Add Comment View Comments

Most helpful rated by users:

©2020 WithoutBook