EnterPi Software Solutions Senior Software Developer Interview Questions and Answers

Q1. What is Virtual DOM, Explain ?
Ans. 
Virtual DOM is a concept in web development where a lightweight copy of the actual DOM is created and manipulated for efficient rendering.
• Virtual DOM is an abstraction of the real DOM.

• It is used in frameworks like React to improve performance.

• Changes made to the virtual DOM are compared with the actual DOM, and only the necessary updates are applied.

• This approach reduces the number of direct manipulations on the actual...read more
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Q2. What is Higher Order Component ?
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Higher Order Component is a function that takes a component and returns a new component with additional functionality.
• Higher Order Components (HOCs) are a pattern in React for reusing component logic.

• They are functions that accept a component and return a new component with enhanced capabilities.

• HOCs can be used for cross-cutting concerns like authentication, logging, or data fetching.

• They enable code reuse, compositio...read more
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Q3. Life Cycle Methods in React
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Life Cycle Methods in React
• React components have several life cycle methods that are called at different stages of a component's life

• These methods allow developers to perform actions like initializing state, fetching data, and updating the UI

• Some commonly used life cycle methods are componentDidMount, componentDidUpdate, and componentWillUnmount
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Q1. Number series in aptitude
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Number series in aptitude involves identifying the pattern in a sequence of numbers and predicting the next number.
• Look for patterns such as arithmetic progression, geometric progression, or a combination of both.

• Check for alternate numbers, differences between consecutive numbers, or multiplication factors.

• Consider prime numbers, squares, cubes, or other mathematical operations applied to the series.

• Example: 2, 4, 6, ...read more
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Q2. Relation ships in berbal
Ans. 
Relationships in verbal communication are crucial for effective collaboration and understanding.
• Verbal communication involves both verbal and non-verbal cues

• Active listening is key to building strong relationships in verbal communication

• Clarity and conciseness in speech can enhance relationships

• Empathy and understanding of others' perspectives are important in verbal relationships
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Q1. Explain the four branches of oops
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The four branches of OOP are encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: The ability for objects of different classes to respond to the same method call.

• Abstraction: Hiding the complex implementation details and showing only
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Q2. Explain about the structures in c
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Structures in C are user-defined data types that allow grouping of variables of different data types under a single name.
• Structures are used to represent a record which consists of different data types.

• They are defined using the 'struct' keyword.

• Each variable in a structure is called a member.

• Structures can be nested within other structures.

• Example: struct employee { int emp_id; char emp_name[50]; float emp_salary; };

• E
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Q1. What is react why it's used?
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Q1. What is virtual DOM in react?
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Filter and shot the filter block based on title using redux?

Q1. What is the difference between an abstract class and an interface in object-oriented programming?
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have method implementations, while interface cannot.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Interfaces are used to define contracts for classes to implement, while abstract classes are used to provide a common base for subclasses.

• Example: Abstr...read more
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Q2. Abstract classes can have implemented methods; interfaces can only have declarations (before JAVA 8).
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Q1. 3 Question was there related to architecture and Computer networks.
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Q1. Microservices and Monolith.
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Q2. Leetcode hard Sum.
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Aptitude questions with some basic coding questions

They have given 3 coding questions and some pseudo codings

Q1. Tell about your self
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Q2. Some coding questions
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Q1. What is single page application
Ans. 
Single page application is a web application that loads a single HTML page and dynamically updates the content as the user interacts with the app.
• SPA uses AJAX and HTML5 to create fluid and responsive user experience.

• It eliminates the need for page reloading during use, making it faster and more efficient.

• Examples include Gmail, Facebook, and Google Maps.
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Q2. What is state management
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State management is the process of managing the state of an application, including data flow, user interface updates, and user interactions.
• State management involves storing and updating the state of an application to ensure data consistency.

• It helps in managing user interface updates based on changes in the application state.

• State management is crucial for handling user interactions and maintaining a seamless user exp...read more
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Q1. What is jdk, string related questions, basic java oops questions?
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