ECS FINANCIAL SERVICE Reactjs Developer Interview Questions and Answers

Q1. Splice & slice difference
Ans. 
Splice is used to add/remove elements from an array, while slice is used to extract a portion of an array without modifying the original array.
• Splice modifies the original array, while slice does not.

• Splice can add elements, remove elements, or replace elements in an array.

• Slice returns a new array with the selected elements from the original array.

• Example: const arr = [1, 2, 3, 4, 5]; arr.splice(2, 1); // removes elem...read more
Answered by AI
Add your answer
Q2. Coding question | How to reverse string
Ans. 
To reverse a string, iterate through the characters and swap them from start to end.
• Create an empty string to store the reversed result.

• Iterate through the characters of the input string from end to start.

• Append each character to the empty string to reverse the order.

• Return the reversed string.
Answered by AI
View 1 more answer

Q1. Basics of javascript and react concept.
Add your answer

Asked about vanilla.js in react interview.

Its a 90 minutes aptitude round. It's having 3 sections :
1 - Logical and Anlytical reasoning
2 - Related to your Skills and the position for which you have applied. For me it was completly on React.
3 - Code Ground, where you have to showcase your coding skills.

Q1. There were programming questions and chose the correct output kind of questions.
Add your answer

Q1. React basic,event loop, Lazy Loading, Suspense, Javascript basics
Add your answer
Q2. Create counter application
Ans. 
Counter application using Reactjs
• Create a React component for the counter

• Use state to keep track of the count

• Implement functions to increment and decrement the count

• Display the count on the screen
Answered by AI
Add your answer

Q1. Aptitude Questions on Profit-Loss, Speed-time-distance, State difference, logical reasoning, sample papers can be found on youtube. Programs on array and string, program level is good practice leetcode and...read more
Add your answer

Q1. What is closure in javascript?
Ans. 
Closure is a feature in JavaScript that allows a function to access variables in its outer scope.
• A closure is created when a function is defined inside another function.

• The inner function has access to the outer function's variables and parameters.

• The outer function's variables and parameters are not accessible from outside the closure.

• Closures can be used to create private variables and methods.

• Example: function outer...read more
Answered by AI
Add your answer
Q2. What are ES6 features?
Ans. 
ES6 features are new additions to JavaScript language syntax and functionality.
• Arrow functions

• Template literals

• Let and const keywords

• Destructuring assignment

• Spread and rest operators

• Classes

• Modules

• Promises

• Default parameters

• Object.assign()

• Symbol data type
Answered by AI
Add your answer

Q1. Sematic elements in HTML? What is Sass, SCSS, LESS and more about CSS? Design a HTML form? Test cases in javascript How you will implement security on a banking website.
Ans. 
Semantic elements in HTML are used to give meaning to the content, making it more accessible and SEO-friendly.
• Semantic elements like <header>, <footer>, <nav>, <article>, <section>, <aside>, <main>, <figure>, <figcaption>, <details>, <summary>, etc., provide structure and meaning to the content.

• They help search engines understand the content better, impr...read more
Answered by AI
Add your answer