10+ Walmart Software Engineer Interview Questions and Answers

The for loop will run indefinitely without any condition to terminate it.

• The loop will continue executing until it is manually interrupted or the program crashes.

• This can lead to a program becoming unresponsive or consuming excessive resources.

• It is important to always include a condition in a for loop to control its execution.

Query to find the top five employee salaries

• Use the SELECT statement to retrieve the employee salaries

• Order the results in descending order using the ORDER BY clause

• Limit the results to the top five using the LIMIT clause

Graph is a non-linear data structure with cycles while tree is a hierarchical data structure without cycles.

• Graph can have multiple starting points and paths between nodes while tree has only one root node and unique paths between nodes.

• Graph can have cycles while tree is acyclic.

• Graph can be directed or undirected while tree is always directed.

• Examples of graphs include social networks, road networks, and computer networks while examples of trees include file systems, organi...read more

Use recursion to print n natural numbers in C++ without semicolon.

• Define a function to print natural numbers recursively.

• Call the function inside main function with n as argument.

• Base case: if n is less than 1, return.

• Print n and call the function with n-1 as argument.

Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.

• Arrays

• Linked Lists

• Stacks

• Queues

• Trees

• Graphs

• Hash Tables

Cadence algorithm is used for real-time stream processing of data.

• Cadence is a distributed system for managing workflows.

• It uses a programming model called the Cadence Workflow Model.

• The Cadence server is responsible for managing the state of workflows.

• The Cadence client is responsible for executing the workflow tasks.

• Cadence provides a lot of features like retries, timeouts, and error handling.

VDOM stands for Virtual Document Object Model, which is a lightweight copy of the actual DOM used by React for efficient rendering.

• VDOM is a tree-like structure that React uses to keep track of changes in the UI.

• When a component's state changes, React creates a new VDOM tree and compares it with the previous one to identify the changes.

• React then updates only the parts of the actual DOM that need to be changed, resulting in faster rendering.

• VDOM also allows React to render co...read more

Expected compensation for software engineers varies based on experience, location, and company size.

• Compensation can range from $60,000 to $200,000+ per year depending on factors such as experience level, location, and company.

• Additional benefits like stock options, bonuses, and perks can also impact overall compensation.

• Research industry standards and use resources like Glassdoor or Payscale to determine a fair salary range.

• Negotiate based on your skills, experience, and the...read more

Remove duplicate numbers from an array of strings

• Iterate through the array and use a Set to store unique values

• Convert the Set back to an array to get the final result

Find the longest substring in an array of strings.

• Iterate through each string and compare with all other strings to find common substrings.

• Use a hash table to keep track of the frequency of each substring.

• Return the substring with the highest frequency.

Implement a key-value structure

• Use a hashmap or dictionary data structure to store key-value pairs

• Implement methods to add, retrieve, update, and delete key-value pairs

• Consider handling collisions and implementing a hashing function

• Example: HashMap keyValueMap = new HashMap<>()

SAP security refers to the measures taken to protect SAP systems and data from unauthorized access and misuse.

• SAP security involves setting up user roles and authorizations to control access to sensitive data

• It includes implementing encryption, authentication, and audit trails to ensure data integrity

• Regular security assessments and updates are necessary to protect against vulnerabilities

• Examples of SAP security tools include SAP GRC (Governance, Risk, and Compliance) and SAP...read more

Classes are blueprints for objects, while objects are instances of classes.

• Classes define the properties and behaviors of objects

• Objects are instances of classes that can hold data and perform actions

• Classes can be used to create multiple objects with similar characteristics

• Objects can interact with each other through methods and properties

System design of web apps involves planning the architecture, components, and interactions of a web application.

• Understand the requirements and constraints of the web app

• Identify the key components such as frontend, backend, database, and APIs

• Design the architecture considering scalability, performance, security, and maintainability

• Choose appropriate technologies and frameworks for each component

• Consider factors like load balancing, caching, and data storage

• Plan for monitorin...read more