Walmart Interview Questions for Technical Profiles
Walmart is a multinational retail company that owns a chain of hypermarkets, discount department stores, and grocery stores and is known for its focus on low prices and everyday essentials. It was founded in 1962 by Sam Walton and is headquartered in Bentonville, Arkansas. Walmart is not only the world’s largest retailer by revenue but also the world’s largest private employer with over 2.3 million employees. Walmart has been ranked first in the Fortune 500 list of the largest corporations in the United States by total revenue since 2014 and has been investing heavily in e-commerce in recent years becoming the largest online retailer in the United States.
Landing a job at Walmart can be a dream come true for many tech professionals. Walmart offers a dynamic and challenging work environment where you can make a real impact with its focus on innovation and cutting-edge technology. But before you can celebrate, you’ll need to ace the technical interview. To help you prepare, we’ve compiled a list of the most commonly asked technical interview questions at Walmart, backlinks with their solution articles, and practice pages.
Table of Content
- DSA Problems
- DBMS
- Operating System
- OOPS
- Computer Network
DSA Problems
Walmart uses computer tricks (Data Structures and Algorithms) to organize stuff, manage products, and deliver things faster. These tricks also help them understand what customers like and make shopping online easier. It’s like smart tools that make Walmart work better and save money.
Core Subjects
DBMS
Database Management System is a software or technology used to manage data from a database.
- Explain the ACID properties of transactions.
- Compare and contrast different types of joins (inner, outer, left, right).
- How do you optimize a slow-running query?
- Explain the difference between Indexing and Hashing for indexing.
- What are the different types of normalization (1NF, 2NF, 3NF)?
- Explain the concept of concurrency control in DBMS.
- How do you handle data redundancy in a database?
- Describe the use of views in a database.
- Explain the difference between OLTP and OLAP databases.
- What are some best practices for database security?
Operating System
Operating System lies in the category of system software. It basically manages all the resources of the computer.
- What is scheduling and its types?
- What’s the Difference Between Paging and Segmentation
- What is a deadlock in OS?
- What is file system and its types in OS?
- What is Concurrency in Operating System ?
- What are the different types of virtualization?
- Discuss techniques Operating Systems Employ for Security and Protection?
- What are the various types of Linux Commands?
- What’s the difference between mutex and semaphore?
- What are the various Types of System Calls in OS?
OOPS
Object-oriented programming aims to implement real-world entities like inheritance, hiding, polymorphism, etc. in programming.
- Explain the difference between Inheritance and Polymorphism.
- What are the different types of Inheritance? Explain each with an example.
- What is Encapsulation? How does it benefit OOP design?
- What is Abstraction? How is it achieved in OOP?
- What are the different types of Polymorphism? Explain each with an example.
- Explain the concept of Method Overriding with an example.
- What is the difference between Public, Private, and Protected access modifiers?
- Explain the concept of Interfaces and how they are used in OOP.
- What are the advantages and disadvantages of using Abstract classes?
- Explain the concept of Static methods and variables in OOP.
Computer Network
Computer network is a system that connects numerous independent computers in order to share information (data) and resources
- What’s the difference between IPv4 and IPv6?
- Explain various types of network topologies?
- What is OSI layers in computer?
- Explain the difference between TCP and UDP protocols.
- What are the three-way handshake in TCP?
- How does routing work in a network? Explain the different types of routing protocols.
- What is Domain Name System(DNS)?
- What is DHCP?
- Explain the concept of subnetting and its benefits for network administration.
- What are firewalls and how do they protect networks from unauthorized access?
- Explain the concept of load balancing .
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