Wednesday, December 16, 2020 3:55:25 PM

Size: 20198Kb
Published: 16.12.2020

Recently, I've been sharing a lot of coding interview questions for those actively seeking jobs as Java developers, particularly beginners, junior developers, and computer engineers who just graduated with no real job experience. Today, I am going to share a list of frequently asked linked list problems common in coding interviews.

A data structure can be any organization, management, and storage format of data that allows efficient access and modification.

If you're interested in reading more about Programming Interview Questions in general, we've compiled a lengthy list of these questions, including their explanations, implementations, visual representations and applications. Linked Lists are a data structure that represents a linear collection of nodes. A characteristic specific to linked lists is that the order of the nodes isn't dictated by their presence in memory, but rather the pointers that each node has to the next node in the sequence. Representation of a Linked List. As the linked list is one of the most basic, and important, data structures in computer science, we've compiled a list of common interview questions regarding linked lists for this article.

## Top Data Structure Interview Questions and Answers

How many pointers are required to implement a simple Linked list? You can find generally 3 pointers engaged:. How many types of Linked lists are there? Singly linked list, doubly linked list , multiply linked list, Circular Linked list. How to represent a linked list node? The simplest representation of a linked list node is wrapping the data and the link using a typedef structure and giving the structure as a Node pointer that points to the next node.

An example representation in C is. Describe the steps to insert data at the starting of a singly linked list. Inserting data at the beginning of the linked list involves creation of a new node, inserting the new node by assigning the head pointer to the new node next pointer and updating the head pointer to the point the new node. Consider inserting a temp node to the first of list. How to insert a node at the end of Linked list? This case is a little bit more complicated.

It depends on your implementation. In case you do not have a tail pointer, you will have to traverse the list till you reach the end i. How to insert a node in random location in the list? Inserting within the middle is that the difficult case as you have got to make sure you do the pointer assignment within the correct order.

Review the code below to get an idea. How to delete a node from linked list? How to reverse a singly linked list? Compare Linked lists and Dynamic Arrays. A dynamic array is a data structure that allocates all elements contiguously in memory, and keeps a count of the present number of elements.

Linked lists have many benefits over dynamic arrays. Insertion or deletion of an element at a specific point of a list, is a constant-time operation, whereas insertion in a dynamic array at random locations would require moving half the elements on the average, and all the elements in the worst case.

Whereas one can delete an element from an array in constant time by somehow marking its slot as vacant, this causes fragmentation that impedes the performance of iteration. What is a Circular Linked list? In the last node of a singly linear list, the link field often contains a null reference. What is the difference between singly and doubly linked lists? A doubly linked list whose nodes contain three fields: an integer value and two links to other nodes one to point to the previous node and other to point to the next node.

Whereas a singly linked list contains points only to the next node. What are the applications that use Linked lists? Both stacks and queues are often implemented using linked lists, other applications are skip list , binary tree, unrolled linked list , hash table, heap, self-organizing list.

How to remove loops in a linked list or what are fast and slow pointers used for? The best solution runs in O N time and uses O 1 space. This method uses two pointers one slow pointer and one fast pointer. The slow pointer traverses one node at a time, while the fast pointer traverses twice as fast as the first one.

If the linked list has loop in it, eventually the fast and slow pointer will be at the same node. On the other hand, if the list has no loop, obviously the fast pointer will reach the end of list before the slow pointer does. Hence we detect a loop. What will you prefer to use a singly or a doubly linked lists for traversing through a list of elements? Double-linked lists require more space per node than singly liked lists, and their elementary operations such as insertion, deletion are more expensive; but they are often easier to manipulate because they allow fast and easy sequential access to the list in both directions.

A tail pointer, pointing on the last node of the list. The key property in the last node is that its subsequent pointer points to nothing at all NULL. A pointer in every node, pointing to the next node element. Leave a Comment Cancel Reply Your email address will not be published.

What are the major data structures used in the following areas : Rdbms, network data model and Hierarchical data model. If you are using c language to implement the heterogeneous linked list, What pointer type will you use? It is not possible to use ordinary pointers for this. Void pointer is capable of storing pointer to any type as it is a generic pointer type. Recursion makes use of system stack for storing the return addresses of the function calls. What are the notations used in evaluation of arithmetic expressions using prefix and postfix forms?

## 300+ TOP DATA STRUCTURES Interview Questions and Answers pdf

However, as the first thing I read, my first thought is to comment, and then close immediately. I say "hey guys Stop turning everything into a problem.

Are you confused about selecting a job? Do you want to know which field best suits your talents? Wisdom jobs is all about training people to find better jobs that improve their skills.

### Top 100 Data Structure and Algorithm Interview Questions for Java Programmers

A list of top frequently asked Linked List Interview Questions and answers are given below. A linked list may be defined as a linear data structure which can store a collection of items. In another way, the linked list can be utilized to store various objects of similar types. Each element or unit of the list is indicated as a node. Each node contains its data and the address of the next node. It is similar to a chain.

Another list of good questions. Try it. Feel free to comment, ask questions if you have any doubt.

Questions. A list of top frequently asked Linked List Interview Questions and answers are given below. An example of representation in C can be defined as​.

Она была установлена на каждом терминале в Третьем узле. Поскольку компьютеры находились во включенном состоянии круглые сутки, замок позволял криптографам покидать рабочее место, зная, что никто не будет рыться в их файлах. Сьюзан ввела личный код из пяти знаков, и экран потемнел. Он будет оставаться в таком состоянии, пока она не вернется и вновь не введет пароль. Затем Сьюзан сунула ноги в туфли и последовала за коммандером.

У меня нет никакого ключа. - Хватит врать! - крикнул Стратмор.  - Где .

Laura T. 18.12.2020 at 09:40

A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles.

Carlos B. 20.12.2020 at 18:33

Privacy big data and the public good frameworks for engagement pdf swami vivekananda quotes in telugu language pdf free download

Rachelle C. 21.12.2020 at 13:55

A linked list organizes items sequentially, with each item storing a pointer to the next one.