Solartis Technology Services Quality Engineer Interview Questions and Answers

Q1. What is Linked List
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A linked list is a linear data structure where elements are stored in nodes with each node pointing to the next node in the sequence.
• Consists of nodes connected by pointers

• Can be singly linked (each node points to the next) or doubly linked (each node points to the next and previous)

• Allows for dynamic size and efficient insertion/deletion operations
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Sorting algo , array question

Q1. Oops dbms coding basics
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Q1. Qs related to javascript
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Q1. Why should we hire you
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Good knowledge required to work g

Crud operation thriugh spring boot project because you learn a lot

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. 1. What are react hooks
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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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Q1. What is Hoisting?
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Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variables and functions are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations are hoisted before variable declarations.
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Q2. What is currying?
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Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of functions, each taking a single argument.
• Currying helps in creating reusable functions and improving code readability.

• It allows partial application of functions, where some arguments are fixed and others are left to be provided later.

• Example: const add = (a) => (b) => a + b; add(2)(3) will return
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Q1. Define hooks and its use cases
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Hooks are functions that allow developers to use state and other React features in functional components.
• Hooks are introduced in React 16.8 to allow state and other React features in functional components.

• Use cases include managing state, using lifecycle methods, and accessing context in functional components.

• Examples of hooks include useState, useEffect, useContext, and custom hooks created by developers.
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Q2. Difference between null and undefined
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Null is a value that represents the absence of a value, while undefined means a variable has been declared but not assigned a value.
• Null is a value that can be assigned to a variable to indicate that it has no value.

• Undefined is a type that is automatically assigned to variables that have been declared but not initialized.

• Null is a deliberate assignment by the programmer, while undefined is a default value assigned by ...read more
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