Gera Developments Interview Questions and Answers

String Constant Pool is a special area in memory where String literals are stored to optimize memory usage.

• String literals are stored in the String Constant Pool to avoid duplicate storage.

• When a new String is created with the same value as an existing String literal, it refers to the same object in the pool.

• Using intern() method on a String object can force it to be stored in the String Constant Pool.

Docker is a platform for developing, shipping, and running applications in containers. Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications.

• Docker allows developers to package applications and their dependencies into a container that can run on any system.

• Kubernetes helps in managing multiple containers across a cluster of servers, providing features like scaling, load balancing, and self-healing.

• Docker is used f...read more

Interface is a contract for classes to implement, while abstract class can have some implementation.

• Interface cannot have any implementation, only method signatures.

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

• Abstract class can have both abstract and concrete methods.

• Interfaces are used for achieving multiple inheritance in Java.

• Example: interface Animal { void eat(); } abstract class Mammal { abstract void breathe(); }

Ivy Engine is a powerful software engine with several advantages.

• 1. Ivy Engine offers high performance and efficiency.

• 2. It provides excellent scalability and can handle large datasets.

• 3. Ivy Engine has a user-friendly interface and is easy to use.

• 4. It supports multiple programming languages and platforms.

• 5. Ivy Engine offers advanced data analytics and machine learning capabilities.

• 6. It provides robust security features to protect sensitive data.

• 7. Ivy Engine has a strong ...read more

Monolithic refers to a software architecture where all components are tightly coupled and dependent on each other.

• All components of the application are interconnected and interdependent

• Changes to one part of the application require changes to other parts

• Difficult to scale and maintain due to the tightly coupled nature

• Examples include traditional desktop applications and some legacy systems

JWT token is a JSON Web Token used for securely transmitting information between parties as a compact and self-contained way.

• JWT token is composed of three parts: header, payload, and signature.

• It is commonly used for authentication and information exchange in web applications.

• JWT tokens are signed using a secret key or a public/private key pair to verify their authenticity.

• Example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0I...read more

Microservices design pattern is an architectural style that structures an application as a collection of loosely coupled services.

• Each service is responsible for a specific business function and can be developed, deployed, and scaled independently.

• Communication between services is typically done through APIs, allowing for flexibility and resilience.

• Microservices promote agility, scalability, and fault isolation in software development.

• Examples of companies using microservices...read more