Signals & Systems (India) Private Limited Interview Questions and Answers

A set of questions related to software engineering concepts and technologies.

• Props and state are used in React to manage and pass data between components.

• React is a JavaScript library used for building user interfaces.

• Higher-Order Components (HoC) are functions that take a component and return an enhanced version of it.

• Redux is a predictable state container for JavaScript apps, commonly used with React.

• Class components and functional components are two ways to define componen...read more

Code to reverse a linked list and convert digital to binary format.

• Create a new linked list and traverse the original list, adding each node to the beginning of the new list

• To convert digital to binary, use the built-in function or write a function to divide the number by 2 and store the remainder in a stack until the quotient is 0, then pop the stack to get the binary representation

Redux for complex state management, Context API for simpler state sharing

• Use Redux for complex state management with multiple components needing access to the same state

• Context API is suitable for simpler state sharing between parent and child components

• Redux is more suitable for larger applications with a lot of state changes and actions

• Context API is easier to set up and use for smaller applications or components

Providing C and C++ code for Senior Software Engineer position

• For C code, demonstrate knowledge of pointers, memory allocation, and basic data structures

• For C++ code, showcase understanding of object-oriented programming, inheritance, and polymorphism

• Provide clear and concise code with proper commenting and formatting

Performance tuning in React involves optimizing code for faster rendering and improved user experience.

• Identify and eliminate unnecessary re-renders by using shouldComponentUpdate or React.memo

• Use PureComponent or memo to prevent unnecessary re-renders of components

• Avoid using inline functions in render methods to prevent unnecessary re-renders

• Optimize component rendering by splitting large components into smaller ones

• Use React DevTools to analyze component performance and id...read more

Reactjs is a JavaScript library for building user interfaces.

• Component-based architecture

• Virtual DOM for efficient updates

• JSX for writing HTML in JavaScript

• State management with setState()

• Lifecycle methods like componentDidMount()