Photon Interactive Software Developer Interview Questions, Process, and Tips

Q1. Explain virtual dom
Ans. 
Virtual DOM is a lightweight copy of the actual DOM that allows for efficient updates and rendering in web applications.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• Changes made to the virtual DOM are compared with the actual DOM, and only the differences are updated.

• This process helps in reducing the number of updates needed and improves the overa
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Q2. Explain map and filter
Ans. 
Map and filter are higher-order functions in JavaScript used to manipulate arrays.
• Map: Transforms each element in an array and returns a new array with the transformed elements.

• Example: [1, 2, 3].map(num => num * 2) => [2, 4, 6]

• Filter: Creates a new array with elements that pass a certain condition.

• Example: [1, 2, 3, 4].filter(num => num % 2 === 0) => [2, 4]
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Q3. What is box model
Ans. 
The box model is a concept in web design that describes how elements are structured with content, padding, borders, and margins.
• The box model consists of content, padding, border, and margin.

• Content is the actual content of the element, such as text or images.

• Padding is the space between the content and the border.

• Border is the line that surrounds the padding and content.

• Margin is the space outside the border, separati
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Q4. What is routing
Ans. 
Routing is the process of selecting a path for network traffic to travel from one point to another.
• Routing determines the best path for data packets to travel

• It involves making decisions based on network protocols and algorithms

• Examples include IP routing in the internet and routing tables in networking devices
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Q5. What is redux used for
Ans. 
Redux is a predictable state container for JavaScript apps.
• Used for managing the state of an application in a predictable way

• Helps in maintaining a single source of truth for the state

• Facilitates state management in complex applications by providing a centralized store

• Works well with React to manage the state of components
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