Walmart Interview Questions, Process, and Tips

Q1. Spark optimization
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Q2. Sql queries hands on
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Q1. Design a simple page using JS, HTML, and CSS. No frameworks
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Q2. What are PropTypes
Ans. 
PropTypes are a way to type-check props in React components to ensure they are passed correctly.
• Used in React to specify the data type of props passed to a component

• Helps catch bugs by providing warnings if incorrect data types are passed

• Can be defined using PropTypes library or as static properties in a component
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Easy to medium level questions

Q1. Spark concept, scala concept
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Q1. Scala questions and problem solving
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Q1. Prepared why are you leaving current organisation
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Q1. What is memoization, also write polyfill of memoize
Ans. 
Memoization is a technique used in programming to store the results of expensive function calls and return the cached result when the same inputs occur again.
• Memoization helps improve the performance of a function by caching its results.

• It is commonly used in dynamic programming to optimize recursive algorithms.

• Example: Memoizing a Fibonacci function to avoid redundant calculations.
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Q2. What is Promise also write polyfill for Promise
Ans. 
A Promise is an object representing the eventual completion or failure of an asynchronous operation.
• A Promise is used to handle asynchronous operations in JavaScript.

• It represents a value that may be available now, or in the future.

• A polyfill for Promise can be implemented using the setTimeout function to simulate asynchronous behavior.
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Q1. Closures, Projecr structure in react Why use redux What frameworks are available
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Q1. Web performance Currying LLD
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2 medium leetcode questions based on sliding window and DP

Q1. A simple react application followed by react specific questions
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Q2. Javascript standard questions
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Q1. Previous project related questions
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Q2. Behavioral questions
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