Infosys BPM Softwaretest Engineer Interview Questions and Answers

I developed a web application for tracking personal fitness goals and progress.

• Used HTML, CSS, and JavaScript for front-end development

• Utilized Node.js and Express for back-end development

• Implemented user authentication and data storage using MongoDB

• Incorporated data visualization tools like Chart.js for displaying progress graphs

k in KNN algorithm represents the number of nearest neighbors to consider when making a prediction.

• k is a hyperparameter that is chosen by the user and determines how many neighbors to look at when classifying a new data point.

• A smaller value of k can lead to overfitting, while a larger value can lead to underfitting.

• For example, if k=3 in a KNN algorithm, the prediction for a new data point will be based on the majori

RabbitMQ is a message broker software that implements the Advanced Message Queuing Protocol (AMQP).

• RabbitMQ allows different software systems to communicate by sending and receiving messages.

• It can be used to decouple different parts of a system, making it more scalable and resilient.

• RabbitMQ supports multiple messaging protocols, including AMQP, MQTT, and STOMP.

LINQ (Language Integrated Query) is a feature in .NET that allows querying data from different data sources using a uniform syntax.

• LINQ allows querying data from collections, databases, XML, and more.

• It provides a set of standard query operators like Where, Select, OrderBy, etc.

• LINQ queries are written in C# or VB.NET and are type-safe.

• Example: var result = from num in numbers where num % 2 == 0 select num;

Hash map is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• Hash map uses a hash function to map keys to indices in an array.

• Collision handling is important in hash map implementation.

• Common operations include adding, removing, and retrieving key-value pairs.

• Example: HashMap map = new HashMap<>();