GXO Softwaretest Engineer Interview Questions and Answers

Easy to medium aptitude questions in this

Where you can work on assignment

Q1. Why java is so popular?
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Q1. Why do you want to join our company ?
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Q2. Who’s in your family?
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Mostly Aptitude, Reasoning,Verbal in the round-1 with 60 questions

2 programming questions - you can select which language u are comfortable

Q1. It's purely based on your resume, so which language u are comfortable they can prefer to ask that's the thing
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Q1. Anagram question
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Q2. Sql join questions
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Explain about DSA and its example in realtime.

Q1. How to optimise performance of a Nodejs app
Ans. 
Optimizing performance of a Nodejs app involves various techniques to improve speed and efficiency.
• Use asynchronous programming to handle multiple requests efficiently

• Implement caching to reduce redundant database queries

• Optimize code by removing unnecessary loops and function calls

• Use a load balancer to distribute traffic evenly across multiple servers

• Monitor and analyze performance using tools like New Relic or Datad
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Q2. How to optimise React
Ans. 
Optimising React involves code splitting, lazy loading, using PureComponent, avoiding unnecessary re-renders, and using memoization.
• Use code splitting to load only necessary components

• Implement lazy loading for components that are not immediately needed

• Utilize PureComponent to prevent unnecessary re-renders

• Avoid unnecessary re-renders by using shouldComponentUpdate or React.memo

• Use memoization techniques like useMemo o
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Q3. What is a callback?
Ans. 
A callback is a function that is passed as an argument to another function and is executed after the completion of that function.
• Callbacks are commonly used in asynchronous programming to handle tasks that take time to complete.

• They allow for functions to be executed once a certain task is completed, without blocking the rest of the code.

• Example: setTimeout function in JavaScript takes a callback function as an argumen
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Question on Linked list. array and string manipulation.

2 Graph question of leetcode

Q1. DSA Questions of leetcode
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Q2. DSA Questions
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