Codegene Technologies Private Limited Front end Developer Interview Questions and Answers

Q1. Questions based on javascript, html, css .it will be based on what role you are applying for
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Q2. Css flexbox, box model, html doctype, semantic tags javascript asynchronous , localstorage etc
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Q1. My qualification and experiences.
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It was a MCQ based questions on JavaScript, React, Redux

1 Coding question from string topic

Q1. What is redux, when to use it
Ans. 
Redux is a predictable state container for JavaScript apps. It helps manage the state of your application in a more organized way.
• Redux is typically used in large-scale applications with complex state management needs

• It helps in maintaining a single source of truth for the state of your application

• Redux works well with React, but can be used with any other JavaScript framework or library

• Actions are dispatched to update
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Q2. Is it optimal to use redux for single state
Ans. 
No, it is not optimal to use redux for single state
• Redux is typically used for managing complex state across multiple components

• Using redux for a single state can add unnecessary complexity to the codebase

• Consider using React's built-in state management for simpler cases
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Q3. What are the key features of SCSS
Ans. 
SCSS is a preprocessor scripting language that is a superset of CSS, adding features like variables, nesting, and mixins.
• Variables allow for reusable values throughout a stylesheet

• Nesting helps to keep styles organized and easier to read

• Mixins allow for reusable blocks of styles to be included in other selectors

• SCSS supports operations like math calculations and functions

• SCSS can be compiled into regular CSS for use in
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Q4. What is Websocket i.o, why it is being used
Ans. 
Websocket i.o is a JavaScript library that enables real-time, bidirectional and event-based communication between the browser and the server.
• Allows for real-time communication between client and server

• Enables bidirectional data transfer

• Supports event-based communication

• Used for applications requiring real-time updates like chat applications, online gaming, live tracking, etc.
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Q5. Difference between forIn and forOf loop,
Ans. 
forIn loop iterates over the enumerable properties of an object, while forOf loop iterates over the values of an iterable object.
• forIn loop is used for iterating over object properties, while forOf loop is used for iterating over array elements.

• forIn loop can be used with objects, while forOf loop can be used with arrays, strings, maps, sets, etc.

• Example: forIn loop - for (let key in object) { console.log(key); }

• Exampl...read more
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Q6. What is filter method which is better to use filter method or foor loop
Ans. 
The filter method is a built-in JavaScript method used to create a new array with all elements that pass a certain condition.
• Filter method is more concise and readable compared to for loop

• Filter method is more declarative and functional programming oriented

• Example: const numbers = [1, 2, 3, 4, 5]; const evenNumbers = numbers.filter(num => num % 2 === 0);

• Example: const words = ['hello', 'world', 'example']; const shortW
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Q1. What motivates you to join protocolzone
Ans. 
I am motivated to join ProtocolZone because of their innovative projects and collaborative team environment.
• Exciting projects at ProtocolZone

• Collaborative team environment

• Opportunity for growth and learning

• Alignment with company values and mission
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Q2. Any questions from your side
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Q1. Questions based on javascript, html, css .it will be based on what role you are applying for
Add your answer
Q2. Css flexbox, box model, html doctype, semantic tags javascript asynchronous , localstorage etc
Add your answer

Q1. How to handle staff workings and how to improve performance.
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Q1. Salary negotiation and other benifits
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