Solartis Technology Services Java Developer Interview Questions and Answers for Experienced

They asked react theoretical questions and one javascript coding round was there which was mandatory to clear the intervuew

Q1. Should possess knowledge on OS?
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Q2. Should be willing to work at night from office.
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Q1. What Os have you worked on?
Ans. 
I have worked on Windows, Linux, and macOS operating systems.
• Windows

• Linux

• macOS
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Q2. What are device drivers?
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Device drivers are software programs that allow the operating system to communicate with hardware devices.
• Device drivers act as a translator between the hardware device and the operating system.

• They provide a standardized way for the operating system to interact with different hardware devices.

• Examples include drivers for printers, graphics cards, network adapters, and USB devices.
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Q1. Question on SQL basics
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Q1. Questions on SQL basics
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Q1. Question on basis SQL
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Q1. In general discussion
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Q1. About previous projects
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Q2. Technical question regarding the field
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Q1. C# basic questions and store procedure questions mostly
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Q2. Trigger ,join related questions
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Q1. AngularJS related questions
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Q1. Previous company discussion
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Q1. 1. What are react hooks
Ans. 
React hooks are functions that allow you to use state and other React features in functional components.
• React hooks were introduced in React 16.8 as a way to write reusable logic in functional components.

• They allow you to use state and other React features without writing a class component.

• Hooks like useState and useEffect are commonly used in React applications.

• useState hook allows you to add state to functional compo...read more
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Q2. 2.What is useMemo() and useCallback()
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useMemo() is a hook in React that memoizes the result of a function, while useCallback() memoizes the function itself.
• useMemo() is used to optimize performance by caching the result of a function and only recomputing it when its dependencies change.

• useCallback() is used to optimize performance by memoizing a function and only creating a new instance when its dependencies change.

• Both hooks are useful when dealing with e...read more
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Q3. 3. How can you manage state globally in react
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State can be managed globally in React using context API or third-party libraries like Redux.
• Context API allows you to create a global state that can be accessed by any component in the React tree.

• Redux is a popular library for managing global state in React applications.

• With Redux, you can define a central store that holds the state and use actions and reducers to update and retrieve the state.

• Other libraries like Mob...read more
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Q1. 1. what are the projects you have worked on till now
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Q2. Salary discussions and joining date discussions
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Coding test in python