National Payments Corporation of India Software Engineer Interview Questions and Answers

Online zoom coding test will be there - 4 questions - 2 about output of code & 2 about technical questions.

Q1. Polymorphism and explain about virtual polymorphism
Ans. 
Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Virtual polymorphism is achieved through virtual functions in C++.

• Virtual functions allow a function in a base class to be overridden in a derived class.

• Example: Animal class with virtual function 'makeSound' overridden in Dog a...read more
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Q2. Write code for virtual polymorphism and explain
Ans. 
Virtual polymorphism allows objects of different classes to be treated as objects of a common superclass.
• Create a base class with virtual functions

• Create derived classes that override the virtual functions

• Use pointers or references of the base class to call the overridden functions
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Q1. About yourself should explain
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Q2. Reason for job change
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I seek new challenges and opportunities for growth that align with my career goals and aspirations in software development.
• Career Growth: I'm looking for a position that offers more opportunities for advancement, such as leading projects or mentoring junior developers.

• Skill Development: I want to work with new technologies and frameworks that will enhance my skill set, like transitioning from Java to modern cloud techn...read more
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Q3. Salary negotiations and location
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Coding questions and some aptitude questions

Q1. Asked oops concept
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Q1. What is ur 5year goal
Ans. 
My 5-year goal is to become a lead software developer in a reputable tech company, leading a team of developers and working on cutting-edge projects.
• Advance my technical skills by learning new programming languages and technologies

• Gain experience in project management and leadership roles

• Contribute to open-source projects and attend tech conferences to network and stay updated with industry trends
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It's mainly Python and Java based, also aptitude here and there

They ask you about your previous projects and also one basic coding question, I was asked to count the frequency of words in a sentence. One SQL question was also asked.

General apti questions and coding

Q1. Sql , rdbms, projects
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Q1. Hr Questions and projects discussion
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Was tough but can be cracked in one go

Easy to moderate need to study dsa

Q1. Self introduction
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Q2. Tell me about your projects
Ans. 
I have worked on various projects including a web application for a healthcare company and a mobile app for a retail business.
• Developed a web application for a healthcare company to manage patient records and appointments

• Created a mobile app for a retail business to enhance customer shopping experience

• Implemented features such as user authentication, data visualization, and real-time updates

• Utilized technologies like R...read more
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There were easy to medium dsa questions

Q1. Oops concept, explain each of them
Ans. 
Object-oriented programming concepts that help in organizing and structuring code.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

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

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary ...read more
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Q2. Multithreading questions
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Aptitude auestions were there

In this round 14 mcq and 2 sql queries were given

Q1. Data structures
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Q1. System Design fundamentals
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Q1. System Design questions
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Q1. What do you think about the negative news going around the company
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Q1. Why join this company
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Q1. Explain about Android lifecycle
Ans. 
Android lifecycle refers to the series of states that an activity or fragment goes through from creation to destruction.
• Android lifecycle includes states like onCreate, onStart, onResume, onPause, onStop, onDestroy, etc.

• Activities and fragments transition between these states based on user interactions and system events.

• Understanding Android lifecycle is crucial for managing resources, saving state, and handling config...read more
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Q2. Explain about fragment lifecycle
Ans. 
Fragment lifecycle refers to the series of events that occur in the lifespan of a fragment in an Android app.
• Fragments go through various states like created, started, resumed, paused, stopped, and destroyed.

• Fragment lifecycle methods include onCreate(), onCreateView(), onResume(), onPause(), onStop(), onDestroy(), etc.

• Fragment lifecycle is closely tied to the hosting activity's lifecycle.

• Understanding fragment lifecyc...read more
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