Data Structure Questions and Answers

Teachers and Examiners (CBSESkillEduction) collaborated to create the Data Structure Questions and Answers. Al the important Information are taken from the NCERT Textbook Data Structure.

Contents

Data Structure Questions and Answers

1. What is a Data Strucuture?
Answer – A data structure is a specific type of format used to arrange, process, retrieve, and store data. There are a number of fundamental and sophisticated forms of data structures, all of which are made to organise data for a particular use. Users may easily get the data they require and use it in the proper ways thanks to data structures.

2. Why we are using Data Structures?
Answer – Users find it simple to access the data they need and use it appropriately thanks to data structures. The organising of information is framed by data structures in a way that both machines and people can better grasp.

Data Structure Questions and Answers

3. Compare a data type with a Data Strucutre.
Answer – A data type is one of the variations of a variable to which only values of that kind may be assigned. The programme can utilise this value at any time. A collection of data of several data kinds is referred to as a data structure. This data set can be used throughout the application and represented using an object.

4. What are some applications of Data structures?
Answer – Core operating system (OS) resources and operations are made possible through the usage of data structures, such as linked lists for memory allocation, file directory management and file structure trees, as well as queues for process scheduling.

Data Structure Questions and Answers

5. What is linear and non-linear data structure?
Answer – Data items are arranged in a linear order and connected to their previous and next neighbouring pieces in a linear data structure. Data elements are attached hierarchically in a non-linear data structure.

6. Describe the types of Data Structures?
Answer – A data structure is a specific type of format used to arrange, process, retrieve, and store data. There are a number of fundamental and sophisticated forms of data structures, all of which are made to organise data for a particular use. Users may easily get the data they require and use it in the proper ways thanks to data structures. There are generally four types of data structures to consider: arrays, lists: linear. Binary, heaps, space division, etc. are all examples of a tree.

Data Structure Questions and Answers

7. What common operations are performed on different Data Structures?
Answer – Some of the commonly performed operations on data strucutures are
a. Insertion – To add a new data item in the given collection of data items.
b. Deletion – To delete an existing data item from the given collection of data items.
c. Raversal – To access each data item exactly once so that it can be processed.
d. Searching – To find out the location of the data item if it exists in the given collection of data items.
e. Sorting – To arrange the data items in some order i.e. in ascending or descending order in case of numerical data and in dictionary oreder in case of alphanumeric data.

8. Differentiate between stack and queue data structure.
Answer – The main distinction between stack and queue data structures is that while queue uses a FIFO data structure type, stack uses LIFO. Last In First Out is referred to as LIFO. It implies that the last element is processed first when data is added to a stack. On the other hand, FIFO stands for First In First Out.

Data Structure Questions and Answers

9. What purpose Linear lists data structre are mostly used for?
Answer – It is a kind of data structure where information is managed and stored in an uniform manner. Each data element in the series is linked to the one before it. Since the data is arranged progressively, it is simple to implement the linear structure in a computer’s memory.

10. What is a list comprehension? How is it useful?
Answer – List comprehensions are helpful and can assist you in writing elegant code that is simple to read and debug, but they are not always the best option. They might increase memory use or slow down the performance of your code.

Data Structure Questions and Answers

11. What is a linked list data structure? What are the applications for the Linked list?
Answer – When it comes to managing dynamic data items, a linked list is the most desired data structure. A node is a type of data element found in linked lists. Additionally, each node has two fields: one field contains data, and the other field contains an address that maintains a link to the node after it.

12. What is the difference between a regular 2D list and a ragged List?
Answer – A list with entries that are lists of the same shape is referred to as a normal two-dimensional list. A ragged list is made up of lists with various shapes as its constituent parts.

Data Structure Questions and Answers

13. Difference between Array and Linked List.
Answer – An array is a grouping of objects with related data types. A linked list is an ordered grouping of identically typed elements where each element is linked to the following one via pointers. The array index can be used to randomly access array elements.

14. What is a stack? What basic operations can be performed on them?
Answer – A stack is an abstract data type used in computer science that acts as a collection of components and has two primary operations: Push, which includes an element in the collection, and. Pop, which eliminates the most recent ingredient to be added that has not yet been eliminated.

Data Structure Questions and Answers

15. Enlist some applications of stacks.
Answer – Some of the application of stacks are –
a. The evaluation of expressions with operands and operators can be done using a stack.
b. Stacks can be used for backtracking, or to verify if an expression’s parenthesis match.
c. It can also be used to change the expression from one form to another.
d. It can be applied to formally manage memories.

16. What are queues? What all operations can be performed on queues?
Answer – An object called a queue is used to control the sorted arrangement of various data kinds. Various queue actions, including Enqueue(), Dequeue(), isFull(), isNull(), and Peek().

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