10+ FIS Software Engineer Interview Questions and Answers

Understanding OOP concepts, SOLID principles, design patterns, and C# features for software engineering.

• OOP concepts include encapsulation, inheritance, polymorphism, and abstraction.

• SOLID principles consist of Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.

• Design patterns like Singleton and Factory Method are commonly used in software development.

• In real-world context, Singleton pattern ensures a class has only one in...read more

MVC architecture in ASP.NET Core is a design pattern that separates an application into three main components: Model, View, and Controller.

• MVC architecture in ASP.NET Core helps in organizing code and improving maintainability.

• ASP.NET Core is a cross-platform, high-performance framework for building modern, cloud-based, Internet-connected applications.

• Kestrel is a cross-platform web server for ASP.NET Core that is lightweight and fast.

• ASP.NET Core is different from plain .NET...read more

Basic OOPS concepts of Java include inheritance, encapsulation, polymorphism, and abstraction. String is immutable while StringBuffer is mutable.

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

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

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

• Abstraction: Hiding the implementation details and showing only the necessary features.

• Stri...read more

Ways to enhance performance for web applications include optimizing code, using caching mechanisms, minimizing HTTP requests, and utilizing content delivery networks.

• Optimize code by removing unnecessary code, using efficient algorithms, and minimizing database queries.

• Implement caching mechanisms such as browser caching, server-side caching, and database caching to reduce load times.

• Minimize HTTP requests by combining CSS and JavaScript files, using image sprites, and reduci...read more

The number of round objects that can fit in a square box depends on the size of the objects and the box.

• The number of round objects that can fit in a square box depends on the size of the objects and the box dimensions.

• If the round objects are small and the box is large, more objects can fit.

• If the round objects are large and the box is small, fewer objects can fit.

• The packing efficiency of the objects also plays a role in determining the number that can fit.

I prefer to work in a location that is easily accessible and has a good work-life balance. My preferred date of joining is within a month.

• Prefer location with good work-life balance

• Location should be easily accessible

• Preferred date of joining within a month

Polymorphism is the ability of a single function or method to operate on different data types.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Animal class with methods eat() and sleep(). Dog and Cat classes can inherit from Animal and override these methods.

The candidate is asked to explain certain concepts in detail related to software engineering.

• Explain the concepts thoroughly with examples

• Provide a clear and concise explanation of each concept

• Demonstrate understanding of the concepts through practical examples

OOPs concept in Java refers to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.

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

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

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

• Abstraction: Hiding the implementation details and showing only the necessary features.

FIS is a global financial technology company providing software solutions for banking and payments.

• FIS offers a wide range of software solutions for financial institutions, including core banking systems, payment processing, and risk management.

• The company serves clients in over 130 countries and processes over 75 billion transactions annually.

• FIS was ranked #1 in the FinTech 100 list in 2020.

• Some of FIS's popular products include FIS Core Banking, FIS Payments, and FIS Risk ...read more

Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.

• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can access the properties and methods of the base class

• Example: Class 'Car' can inherit from class 'Vehicle' to reuse common vehicle attributes and methods

Child life cycle hooks are methods that are called at specific points in the lifecycle of a child component in Angular.

• ngOnChanges: called when an input property of the component changes

• ngOnInit: called once the component is initialized

• ngDoCheck: called during every change detection run

• ngAfterContentInit: called after content (ng-content) has been projected into the component

• ngAfterContentChecked: called after every check of the projected content

• ngAfterViewInit: called after ...read more

Equals method checks for object equality while hashcode method returns a unique integer for an object.

• Equals method compares two objects for equality based on their contents

• Hashcode method returns a unique integer value for an object based on its contents

• Both methods are used in conjunction to ensure correct behavior in collections like HashMap