DSA Interview Questions || skilldekho.online
As a job seeker in the tech industry, Data Structures and Algorithms (DSA) is an area where you cannot afford to lack proficiency. This is the reason why Dsa Interview questions are a common part of tech interviews, be it for freshers or experienced professionals. To help you sail smoothly through these interviews, this guide compiles the top 100 DSA interview questions that you should prepare for.
Understanding DSA Interview Questions
DSA forms the core of computer science and software engineering. It's a fundamental topic that forms the foundation for writing efficient and scalable code. The questions in DSA interviews revolve around various data structures like arrays, strings, linked lists, stacks, queues, trees, heaps, hashing, graphs, and algorithms such as searching, sorting, recursion, dynamic programming, and bitwise manipulations.
DSA Interview Questions on Array
An array is one of the most basic yet important data structures. It's a container that holds a fixed number of elements of the same type, stored in contiguous memory locations. Here are a few commonly asked DSA interview questions on arrays:
- How do you find a pair with the given sum in an array?
- How do you find the best time to buy and sell stock using an array of prices?
- How do you find duplicate elements in an array?
- How do you find the product of an array except for the current element at each index?
DSA Interview Questions on Matrix
A matrix is a two-dimensional data structure where numbers are arranged into rows and columns. Here are some matrix-related DSA interview questions:
- How do you set the matrix zeroes?
- How do you traverse a matrix in a spiral order?
- How do you transpose a matrix?
- How do you search a word in a matrix?
DSA Interview Questions on String
A string is a sequence of characters. It's a vital data structure that is used in almost all programming languages. Here are some string-related DSA interview questions:
- How do you find the longest substring without repeating characters?
- How do you replace the longest repeating characters?
- How do you find the smallest window in a string containing all characters of another string?
- How do you check whether two strings are anagrams?
DSA Interview Questions on Linked List
A linked list is a linear data structure where each element is a separate object. Each element in a linked list is a node that contains data and a reference(pointer) to the next node in the sequence. Here are some linked list-related DSA interview questions:
- How do you reverse a linked list?
- How do you detect a cycle in a linked list?
- How do you merge two sorted linked lists?
DSA Interview Questions on Stack & Queue
Stack and Queue are abstract data types that hold a collection of elements. Stack follows the LIFO(Last In First Out) principle while Queue follows the FIFO(First In First Out) principle. Here are some stack and queue-related DSA interview questions:
- How do you convert an Infix expression to a Postfix expression?
- How do you find the next greater element in an array using a stack?
- How do you delete the middle element of a stack?
DSA Interview Questions on Tree
A tree is a non-linear data structure that simulates a hierarchical tree structure with a set of linked nodes. Here are some tree-related DSA interview questions:
- How do you find the maximum depth of a binary tree?
- How do you check if two trees have the same structure?
- How do you invert/flip a binary tree?
This post first appeared on 40 Essential Interesting Questions For Your Data Engineering Roadmap By Skilldekho, please read the originial post: here
