PowerSchool India Flutter Developer Interview Questions and Answers

Q1. Q1 difference between let and const
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Q2. Q2 what are closures?
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Q3. Q3. What is typeof null
Ans. 
typeof null returns 'object' in JavaScript.
• typeof null is 'object' in JavaScript

• This is a historical bug in JavaScript that has not been fixed for backward compatibility

• Example: console.log(typeof null) will output 'object'
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Q1. Q1. Find palindrome strings in an array of strings.
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Q2. Q2. Explain debouncing with example.
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Q1. What is react, diff between react and angular, deep copy shallow copy, hoisting, diff between props and state
Ans. 
React is a JavaScript library for building user interfaces. It is different from Angular in various ways.
• React is a library while Angular is a framework

• React uses virtual DOM while Angular uses real DOM

• React is more flexible and easier to learn than Angular

• Deep copy creates a new object with the same values while shallow copy creates a new reference to the same object

• Hoisting is a JavaScript mechanism where variables a...read more
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Q2. Implement custom hooks and array flat method
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Implement custom hooks and array flat method
• Custom hooks are reusable functions that allow you to extract component logic into reusable functions

• Array flat method is used to flatten an array of nested arrays into a single array

• To implement custom hooks, create a function that uses the useState and useEffect hooks

• To implement array flat method, use the reduce method to flatten the array
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Easy leetcode code 2 questions , HTML5 css javascript simple screen design

Q1. Oop, Simple coding javascript, react basic, sql basic
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There were 3 coding questions, all of them were medium level difficulty. Typically people who solved 2 questions correctly were shortlisted for the interview rounds.

Q1. Rainwater trapped question and some optimisations, after that some additional changes to the question were added.
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Q2. Print zigzag matrix
Ans. 
Prints a zigzag matrix
• Create a 2D array with the desired number of rows and columns

• Use nested loops to iterate through the array

• Alternate the direction of iteration to create the zigzag pattern

• Print the elements of the array in the desired format
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Q1. Explain about projects in deep and some questions related to that.
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Q2. Find a subset of an array having a target sum.
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Q1. Tell me a thing in which earlier you struggled and after some rigorous practice and dedication you excelled.
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Q2. Explain a moment in life where you showcased your leadership and collaborative skills.
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Q1. Concepts of node and Js
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Q1. Tell me about yourself
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Q2. Coding Question
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Q1. Tell me about yourself
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Q2. Salary discussion
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Q1. Major on Tech Stack , you are working on.
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