CGI Group Java Developer Interview Questions, Process, and Tips

Q1. Basic core java, multi threading, spring, collection
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Q2. Spring features
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Q3. Spring vs spring boot
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Spring is a framework for building Java applications, while Spring Boot is a tool that simplifies the setup and configuration of Spring applications.
• Spring provides a comprehensive framework for building Java applications, including features like dependency injection, AOP, and MVC.

• Spring Boot is built on top of Spring and provides auto-configuration, which reduces the boilerplate code required to set up a Spring applic...read more
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Q4. Multi threading
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Q5. Map vs flat map
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Map applies a function to each element of a stream and returns a new stream of the results. FlatMap applies a function to each element and flattens the results into a single stream.
• Map transforms each element of a stream independently.

• FlatMap transforms each element of a stream and flattens the results into a single stream.

• Map is useful when you want to transform each element of a stream into another type.

• FlatMap is us...read more
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Q1. Questions on APIs, Objects, Interfaces, Overload, Override, completable, Springboot, pom.xml details, maven. gradle.,
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Print prime number
Print odd numbers greater than 84

Q1. Oops concepts with example
Ans. 
Oops concepts are fundamental principles of object-oriented programming.
• Encapsulation: bundling data and methods together in a class

• Inheritance: creating new classes from existing ones

• Polymorphism: objects of different types can be treated as objects of a common superclass

• Abstraction: hiding unnecessary details and exposing only essential features

• Encapsulation example: a Car class with private variables for make, model...read more
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Q2. Class definition with example
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A class is a blueprint for creating objects. It defines the properties and behaviors that an object of that class will have.
• A class is declared using the 'class' keyword followed by the class name.

• It can have variables (fields) to store data and methods to perform actions.

• Objects are created from a class using the 'new' keyword.

• Classes can be organized into packages to provide a hierarchical structure.

• Inheritance allow...read more
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Q1. 2 programming questions on java related to string manipulation and other is about integer array to find maximum sum of subarray we can use kadane algorithms
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