10+ DXC Technology Interview Questions and Answers

Spring is a framework for building Java applications, while Spring Boot is a tool that simplifies the setup and configuration of Spring applications.

• Spring is a comprehensive framework that provides support for various functionalities like dependency injection, aspect-oriented programming, and more.

• Spring Boot is an opinionated tool that simplifies the setup and configuration of Spring applications by providing defaults and auto-configuration.

• Spring Boot includes embedded ser...read more

I use JPA in my project by defining entity classes, annotating them with JPA annotations, creating repositories, and using JPQL queries.

• Define entity classes with @Entity annotation

• Annotate fields with @Column, @Id, @GeneratedValue, etc.

• Create repositories by extending JpaRepository interface

• Use JPQL queries for custom database operations

Microservices communicate through REST APIs and messaging queues in our project.

• Microservices communicate with each other using REST APIs for synchronous communication.

• Messaging queues like Kafka or RabbitMQ are used for asynchronous communication between microservices.

• Service discovery tools like Eureka or Consul are used to locate and communicate with other microservices.

• Microservices may also use gRPC for communication in some cases.

The given array needs to be flattened to a single-level array.

• Iterate through the array elements

• If an element is an array, recursively flatten it

• If an element is not an array, add it to the result array

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Find max from array in Python without using built-in function.

• Iterate through the array and compare each element with a variable storing the current maximum value.

• If the element is greater than the current maximum, update the variable.

• Return the variable after iterating through the entire array.

Array methods in Javascript are built-in functions that can be used to manipulate arrays.

• Some common array methods are push(), pop(), shift(), unshift(), slice(), splice(), concat(), join(), indexOf(), and forEach().

• push() adds one or more elements to the end of an array.

• pop() removes the last element from an array.

• shift() removes the first element from an array.

• unshift() adds one or more elements to the beginning of an array.

• slice() returns a new array with a portion of the ...read more

Spring Boot annotations are used to simplify the development process by providing shortcuts for common configurations and functionalities.

• Annotations like @SpringBootApplication, @RestController, @Autowired, @ComponentScan are commonly used in Spring Boot applications.

• Annotations help in reducing boilerplate code and configuring various aspects of the application.

• For example, @SpringBootApplication is used to mark the main class of a Spring Boot application.

• Annotations like @...read more

=== compares value and type, while == only compares value

• === is stricter than == in type checking

• === returns true only if both operands are of the same type and have the same value

• == performs type coercion, which can lead to unexpected results

• For example, '5' == 5 returns true, but '5' === 5 returns false

Promise is a way to handle asynchronous operations in JavaScript.

• Promises represent a value that may not be available yet.

• They have three states: pending, fulfilled, and rejected.

• Promises can be chained using .then() and .catch() methods.

• They help avoid callback hell and make code more readable.

• Example: new Promise((resolve, reject) => {...})

State and props are two important concepts in React for managing data and passing data between components.

• State is used to manage data within a component and can be updated using setState() method.

• Props are used to pass data from parent component to child component.

• State is mutable while props are immutable.

• Example:

• Example:

Manual testing is a process of verifying software manually without the use of automation tools.

• Manual testing involves executing test cases manually

• It requires human intervention to identify defects and issues

• It is time-consuming and requires a lot of effort

• It is useful for testing user interface, usability, and exploratory testing

• Examples include ad-hoc testing, exploratory testing, and regression testing