Data Structures & Algorithms Interview Questions and Answers for Beginners | DSA | @SCALER

Welcome to Data Structures and Algorithms Interview Preparation where Navdeep Sandhu (SWE & Instructor, SCALER) gives you a step by step guide to how to approach a DSA interview. Check out Free masterclasses by industry-leading experts: https://www.scaler.com/events?utm_source=Youtube&utm_medium=osocial&utm_campaign=brand_scaler_events_osocial_youtube_dsa-interview-preparation-by-navdeep-sandhu&utm_content=YTDescription What is DSA? DSA stands for Data Structures and Algorithms. It refers to a set of techniques and methods used to organise and manipulate data in a computer program. Data structures are a way of organising and storing data in a way that enables efficient access and modification, while algorithms are a set of instructions that perform a specific task or solve a problem. What is data structure? A data structure is a way of organising and storing data in a computer program so that it can be accessed and manipulated efficiently. It defines a set of rules for how data is organised, how it is accessed, and how operations can be performed on it. Examples include arrays, linked lists, and trees. What is an algorithm? An algorithm is a set of instructions for solving a problem or performing a task in a computer program. It defines a series of steps or procedures that must be followed in order to achieve a desired outcome. Algorithms are used in a wide range of applications, from search engines to robotics. Types of DSA There are many types of Data Structures and Algorithms (DSA) including arrays, linked lists, stacks, queues, trees, graphs, hash tables, and sorting and searching algorithms. Each DSA has its own strengths and weaknesses and is suitable for different types of data processing and storage needs. Applications of DS Data Structures have a wide range of applications in computer science, including database management, algorithm design and analysis, operating systems, artificial intelligence, machine learning, and web development. They are used to store, organise, and manipulate large amounts of data efficiently and effectively, enabling faster and more accurate processing of information. What are Arrays? Arrays are a data structure that stores a collection of values of the same type. They are often used to organise and manipulate large amounts of data in computer programming and provide a convenient way to access and modify individual elements within the array. What is a linked list? A linked list is a linear data structure where each element is a separate object. Linked list elements are not stored at a contiguous location; the elements are linked using pointers. Each node of a list is made up of two items - the data and a reference to the next node. The last node has a reference to null. The entry point into a linked list is called the head of the list. It should be noted that the head is not a separate node, but a reference to the first node. If the list is empty then the head is a null reference. What are queues? Queues in data structures are abstract collections that follow the First-In-First-Out (FIFO) principle. Elements are added to the back and removed from the front. They are commonly used for managing processes, handling tasks, and implementing algorithms like breadth-first search. What is data science? Data Science is an interdisciplinary field that involves the use of statistical, computational, and machine-learning techniques to extract insights and knowledge from large and complex data sets. It encompasses various stages of data analysis, including data collection, cleaning, processing, modelling, and visualisation. Take the Hunger test today: https://bit.ly/3rAwoQk ______________________________________________________________________________ About SCALER: A transformative tech school, creating talent with impeccable skills. Upskill and Create Impact. Learn more about Scaler: https://bit.ly/3rAwoQk 📌 Follow us on Social and be a part of an amazing tech community📌 👉 Meet like-minded coder folks on Discord - https://discord.com/invite/ejFeksEtTq 👉 Tweets you cannot afford to miss out on - https://twitter.com/scaler_official 👉 Check out student success stories, expert opinions, and live classes on Linkedin - https://www.linkedin.com/school/scalerofficial 👉 Explore value-packed reels, carousels and get access to exclusive updates on Instagram - https://www.instagram.com/scaler_official/ 📢 Be a part of our one of a kind telegram community: https://t.me/Scalercommunity 🔔 Hit that bell icon to get notified of all our new videos 🔔 If you liked this video, please don't forget to like and comment. Never miss out on our exclusive videos to help boost your coding career! Subscribe to Scaler now! #datastructures #dsa #softwareengineering #scaler

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