10+ Savantis Solutions India Interview Questions and Answers

Spring Boot is a framework that simplifies the configuration and deployment of Spring-based applications.

• Spring Boot provides a pre-configured environment for building and running Spring applications.

• It eliminates the need for XML configuration files and reduces boilerplate code.

• It includes an embedded web server and supports various data sources and messaging systems.

• Example: Spring Boot can be used to quickly create a RESTful web service with minimal configuration.

• Example: ...read more

Creating an immutable class involves making the class and its fields final and not providing any setters.

• Make the class final so it cannot be extended

• Make all fields final so they cannot be changed

• Do not provide any setters, only getters

• If mutable objects are used in the class, return copies of them in getters

CoreData is a framework provided by Apple for managing the model layer of an application.

• CoreData is used to manage the model layer objects in an iOS application.

• It provides an object graph management and persistence framework.

• CoreData can be used to store data locally on the device.

• It supports relationships between entities and data validation.

• Example: Storing user information like name, email, and address in a CoreData database.

The @Qualifier annotation is used in Spring to resolve ambiguity when multiple beans of the same type are present.

• It is used to specify which bean should be autowired when multiple beans of the same type are present

• It can be used with constructor injection, setter injection, and field injection

• It is commonly used in conjunction with @Autowired annotation

• Example: @Qualifier("myBean")

jdbctemplate is a class in Spring Framework that simplifies the use of JDBC while handling exceptions and boilerplate code.

• It is used to perform database operations such as querying, updating, and deleting data.

• It provides methods for executing SQL statements and mapping results to Java objects.

• It handles exceptions and releases resources automatically.

• Example: jdbcTemplate.queryForObject("SELECT COUNT(*) FROM users", Integer.class);

Marker interfaces are interfaces with no methods, used to mark a class as having a certain property or behavior.

• Marker interfaces are used to provide metadata about a class.

• They are used to indicate that a class implements a certain behavior or has a certain property.

• Examples include Serializable, Cloneable, and Remote interfaces in Java.

• Marker interfaces can also be used to trigger specific behavior in frameworks or libraries.

• They are often used in combination with reflectio...read more

.NET Core is a cross-platform framework while DI is a built-in dependency injection system in .NET Core.

• DI in .NET Core is a built-in dependency injection system that allows for loosely coupled code.

• .NET Core is a cross-platform framework that can run on Windows, Linux, and macOS.

• DI in .NET Core can be configured using various methods such as constructor injection, property injection, and method injection.

• In .NET Core, DI is used to manage the dependencies of an application a...read more

Multi-threading is the ability of a CPU to execute multiple threads concurrently, allowing for better performance and responsiveness.

• Allows multiple tasks to run concurrently on a single CPU

• Improves performance by utilizing idle CPU time

• Can lead to synchronization issues and race conditions

• Examples: web servers handling multiple requests simultaneously, video games rendering graphics while processing user input

Hashmap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.

• Hashmap uses an array to store the key-value pairs

• The key is hashed to generate an index in the array

• If two keys hash to the same index, a linked list is used to store the values

• Hashmap provides constant time complexity for insertion, deletion, and retrieval

• Java's Hashmap implementation uses a load factor to determine when to resize the array

Angular is a complete framework while React is a library for building UI components.

• Angular has a steeper learning curve and requires more setup time.

• React is more flexible and can be easily integrated into existing projects.

• Angular uses two-way data binding while React uses one-way data flow.

• Angular has a larger file size while React is lightweight.

• Angular has a built-in dependency injection system while React does not.

• Examples of companies using Angular include Google and M...read more

Worked on various AWS resources including EC2, S3, RDS, Lambda, and CloudFormation.

• EC2 - Elastic Compute Cloud for scalable computing capacity

• S3 - Simple Storage Service for object storage

• RDS - Relational Database Service for managed databases

• Lambda - Serverless computing service for running code without provisioning servers

• CloudFormation - Infrastructure as Code service for automating resource provisioning