Infosys Associate Consultant Interview Questions and Answers

Multithreading is the ability of a CPU to execute multiple threads concurrently, improving performance and responsiveness.

• Multithreading allows multiple threads to run concurrently within the same process.

• Stages of multithreading include thread creation, thread scheduling, and thread execution.

• Example: A web server handling multiple client requests simultaneously using multithreading.

To run 5 tasks simultaneously, use multithreading or multiprocessing in the code.

• Use multithreading or multiprocessing to create separate threads/processes for each task.

• Ensure proper synchronization and communication between the threads/processes if needed.

• Consider using a thread pool or multiprocessing pool for better resource management.

• Example: In Python, you can use the 'threading' or 'multiprocessing' module to a...read more

Our deployment process involves continuous integration and automated testing before releasing to production.

• We use Jenkins for continuous integration to automatically build and test code changes.

• Before deployment, code changes are reviewed by team members to ensure quality.

• We have different environments for testing such as development, staging, and production.

• Deployment to production is done using automated scripts to ...read more

DDL commands are used to define or modify the structure of database objects, while DML commands are used to manage data within those objects.

• DDL commands include CREATE, ALTER, DROP, TRUNCATE, etc.

• DML commands include INSERT, UPDATE, DELETE, SELECT, etc.

• DDL commands are used to create or modify tables, indexes, views, etc.

• DML commands are used to insert, update, delete, or retrieve data from tables.

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to process collections of objects in a functional style.

• Default methods allow interfaces to have method imple...read more

Demonstrating Java Streams and Lambda functions with a simple example of filtering and mapping a list of integers.

• Streams allow processing sequences of elements (e.g., collections) in a functional style.

• Lambda functions provide a concise way to represent a single method interface.

• Example: Filtering even numbers from a list: List<Integer> evens = numbers.stream().filter(n -> n % 2 == 0).collect(Collectors.toLis...read more

I have experience working on various projects and have made significant contributions to each.

• Led a team in implementing a new software system for a client, resulting in a 20% increase in efficiency

• Developed a marketing strategy that led to a 30% increase in sales for a product

• Collaborated with cross-functional teams to successfully launch a new product in the market

Creating a REST endpoint for a web application

• Define the endpoint URL and HTTP method (e.g. GET, POST)

• Implement the logic to handle requests and responses

• Use frameworks like Spring Boot for Java or Express for Node.js

• Secure the endpoint with authentication and authorization

• Document the endpoint with Swagger or OpenAPI

I have experience working on various projects in different industries.

• Managed a team to implement a new software system for a retail company

• Led a market research project for a healthcare organization

• Developed a marketing strategy for a tech startup

• Collaborated with cross-functional teams on a product launch for a consumer goods company

I address contradictions by actively listening, seeking common ground, and proposing solutions collaboratively.

• Listen actively to understand the perspectives of colleagues and superiors

• Seek common ground by focusing on shared goals and interests

• Propose solutions collaboratively by involving all parties in the decision-making process

Count unique values of a column, excluding null values.

• Use SQL query with COUNT(DISTINCT column_name) to count unique values.

• Filter out null values using WHERE clause.

• Example: SELECT COUNT(DISTINCT column_name) FROM table_name WHERE column_name IS NOT NULL;

React is a JavaScript library for building user interfaces.

• React is used for creating interactive UI components.

• It uses a virtual DOM for efficient rendering.

• React components have a lifecycle which includes mounting, updating, and unmounting.

• Some of the lifecycle methods include componentDidMount, componentDidUpdate, and componentWillUnmount.

Hooks in programming are functions that allow developers to execute code at specific points in the application's lifecycle.

• Hooks are used in React to add functionality to functional components.

• useState is a hook used to add state to functional components.

• useEffect is a hook used to perform side effects in functional components.

• Custom hooks can be created to reuse logic across multiple components.