Infosys Hadoop Developer Interview Questions and Answers

Standard quantitative questions accompanied by logical reasoning and related topics.

Q1. Asked about my projects.
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Q2. What are the basic Object-Oriented Programming (OOP) concepts, including polymorphism and inheritance?
Ans. 
OOP concepts include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

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

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

• Abstraction: Hides complex implementation details and only shows the necessa
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Q3. Can you explain React, how it functions, and the related concepts?
Ans. 
React is a JavaScript library for building user interfaces.
• React allows developers to create reusable UI components.

• It uses a virtual DOM for efficient rendering.

• React uses a declarative approach to define how the UI should look based on the application state.

• It supports server-side rendering for improved performance.

• React can be used with other libraries like Redux for state management.
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Q4. About my final year project and how would you improve it?
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Q1. Can you introduce yourself and provide some information about your family?
Ans. 
I am a software engineer with a passion for coding and problem-solving. I come from a close-knit family with supportive parents and siblings.
• Software engineer with coding and problem-solving skills

• Close-knit family with supportive parents and siblings
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Q2. What are your strengths and weaknesses, and how are you addressing your weaknesses?
Ans. 
My strengths include problem-solving and teamwork, while my weaknesses are time management and public speaking. I am addressing my weaknesses by taking time management courses and practicing public speaking.
• Strengths: problem-solving, teamwork

• Weaknesses: time management, public speaking

• Addressing weaknesses: taking time management courses, practicing public speaking
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Q1. Can you tell me about yourself?
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I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• 5 years of experience in software development

• Proficient in developing web applications

• Skilled in using various technologies

• Passionate about software engineering
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Q2. Can you explain one of the projects you completed during the academic year?
Ans. 
Developed a web-based student management system for tracking attendance and grades.
• Used HTML, CSS, and JavaScript for front-end development.

• Implemented backend functionality using PHP and MySQL database.

• Incorporated user authentication and authorization features for secure access.

• Tested the system thoroughly to ensure functionality and user-friendliness.
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Q3. What were some of the fundamental concepts of Artificial Intelligence that the interviewer inquired about during your interview as a Computer Science and Engineering - Artificial Intelligence and Machine L...read more
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Q4. What were your Achievements in the graduation years
Ans. 
Graduated with honors, completed multiple internships, and won coding competitions
• Graduated with honors in Computer Science

• Completed internships at XYZ Company and ABC Corporation

• Won first place in coding competition at university hackathon
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Q1. Asked about technical expertise and topic related question
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Q2. Notice period and salary discussion
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Q1. Technical in depth
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Q2. Salary discussion
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Q1. Notice period and salary discussion
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Q1. Can you tell me about yourself?
Ans. 
I am a passionate software engineer with a strong background in computer science and experience in developing innovative solutions.
• Completed a Bachelor's degree in Computer Science from XYZ University

• Proficient in programming languages such as Java, Python, and C++

• Worked on projects involving web development, database management, and machine learning

• Strong problem-solving skills and ability to work in a team environmen
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Q2. What was your role and contributions in your projects?
Ans. 
I was responsible for designing and implementing new features, fixing bugs, and optimizing performance in various projects.
• Designed and implemented new features based on client requirements

• Fixed bugs reported by QA team or end users

• Optimized performance by refactoring code or improving algorithms

• Collaborated with team members to ensure project deadlines were met
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Q3. Are you willing to relocate?
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Yes, I am open to relocating for the right opportunity.
• I am open to relocating for the right job opportunity

• I am flexible and willing to move for the right position

• I have relocated for previous jobs and am comfortable with the process
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Aptitude round
English exam
Maths tricky questions exam
Coding 1 easy 1 tuff

Q1. Difference between css and css3
Ans. 
CSS is the standard styling language for websites, while CSS3 is the latest version with new features like animations and transitions.
• CSS is the standard styling language used for describing the look and formatting of a document written in HTML.

• CSS3 is the latest version of CSS with new features like animations, transitions, gradients, and more.

• CSS3 introduced new layout modules like Flexbox and Grid, making it easier ...read more
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Q2. Tell disadvantages of your projects
Ans. 
Some disadvantages of my projects include scalability issues, lack of documentation, and limited testing.
• Scalability issues: The project was not designed to handle a large amount of data or users, leading to performance issues.

• Lack of documentation: There was insufficient documentation on the codebase, making it difficult for new team members to onboard or for future maintenance.

• Limited testing: Due to time constraints...read more
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Q1. Are you okay for night shift
Ans. 
Yes, I am okay with night shifts as I am comfortable working during those hours.
• I have previous experience working night shifts in my previous job.

• I am a night owl and tend to be more productive during late hours.

• I understand the importance of round-the-clock support in the software industry.
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Q2. Are you okay with reallocation
Ans. 
Yes, I am okay with reallocation as it is a common practice in the software engineering field.
• I am comfortable with reallocation as it is a common practice in software development.

• I understand that reallocation may be necessary for project requirements or team dynamics.

• I am adaptable and willing to take on new challenges that may come with reallocation.
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Dominations of coins it was a dp question

Q1. Implement min stack
Ans. 
Implement a stack that supports finding the minimum element in constant time.
• Use two stacks - one to store the actual elements and another to store the minimum values at each level.

• When pushing an element, compare it with the current minimum and push the smaller value onto the minimum stack.

• When popping an element, also pop from the minimum stack if the popped element is the current minimum.
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Q2. Lca of given nodes in the tree
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LCA (Lowest Common Ancestor) of given nodes in a tree is the node that is the lowest common ancestor of the given nodes.
• Traverse the tree to find the paths from the root to each of the given nodes.

• Compare the paths to find the last common node, which is the LCA.

• If one of the given nodes is the ancestor of the other, return the ancestor node as the LCA.
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