Turing Full Stack Software Developer Interview Questions, Process, and Tips

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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Was given a DSA problem on squares it was relatively easy.

Was giving another problem as regards longest sub array without repeating letters.

Q1. What is git grep
Ans. 
git grep is a command in Git that allows you to search through the contents of files in a Git repository.
• Allows searching through the contents of files in a Git repository

• Similar to the 'grep' command in Unix/Linux

• Can be used to search for specific strings or patterns in files

• Useful for finding references to functions, variables, or text within the codebase
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Q2. What is profilers
Ans. 
Profilers are tools used to analyze the performance of software applications by measuring various metrics such as CPU usage, memory usage, and execution time.
• Profilers help identify bottlenecks and optimize code for better performance.

• Examples of profilers include VisualVM, YourKit, and Xcode Instruments.

• Profiling can be done for different aspects of an application, such as CPU profiling, memory profiling, and network
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