Netlink Software Interview Questions, Process, and Tips

Virtual DOM is a programming concept where a virtual representation of the actual DOM is created and manipulated for faster rendering.

• Virtual DOM is used in ReactJS to improve performance.

• It allows for efficient updates to the actual DOM by only updating the necessary changes.

• The virtual DOM is a lightweight copy of the actual DOM.

• Changes made to the virtual DOM are compared to the previous version to determine what ne...read more

Refs are a way to access and manipulate DOM elements or React components directly.

• Refs are created using React.createRef() or callback refs.

• They can be used to access and modify the properties and methods of a component or DOM element.

• Refs should be used sparingly and only when necessary, as they can make code harder to understand and maintain.

• Example:

• Example: const inputRef = React.createRef()

The == operator compares values after type coercion, while === operator compares values and types.

• The == operator returns true if the operands are equal after type coercion.

• The === operator returns true if the operands are strictly equal without type coercion.

• Type coercion is the automatic conversion of a value from one data type to another.

• For example, 1 == '1' returns true because the string '1' is coerced to the num...read more

To run a callback function after state change in React, use useEffect hook.

• Import useEffect hook from 'react'.

• Use useEffect with dependency array containing the state variable.

• Pass the callback function as the second argument to useEffect.

• The callback function will run after every state change.

Creating and distributing LUN involves configuring storage arrays and assigning them to servers.

• Configure storage arrays with required capacity and performance levels

• Assign LUNs to specific servers using storage management software

• Ensure proper zoning and masking to restrict access to LUNs

• Monitor and manage LUNs for optimal performance and capacity utilization