Infosys BPM Java Developer Interview Questions and Answers

Q1. Write a query for inner join
Ans. 
An inner join query combines rows from two or more tables based on a related column between them.
• Use the SELECT statement to specify the columns you want to retrieve

• Use the FROM clause to specify the tables you want to join

• Use the INNER JOIN keyword to perform an inner join based on a common column
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It was good and mostly apptitude

Two questions needs to be solved

Q1. About machine learning algorithms
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Q2. Describe daTa analytics tools
Ans. 
Data analytics tools are software programs used to analyze and visualize large sets of data to extract valuable insights.
• Data visualization tools like Tableau and Power BI help in creating interactive charts and graphs.

• Statistical analysis tools like R and Python with libraries like Pandas and NumPy are used for advanced data analysis.

• Machine learning platforms like TensorFlow and scikit-learn are used for predictive a...read more
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Q1. Self intro about me
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Q2. Explanation about their company
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General knowledge ,appitude

Q1. What is Rabbit MQ?
Ans. 
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.
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Q2. What is LINQ in .net?
Ans. 
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;
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10 day,Numbers,Alebra

Q1. Oop,C++.html,css,javascrept
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Q2. What is order list
Ans. 
An ordered collection of items, typically displayed in a numbered list.
• Order list is used to display items in a specific sequence.

• Items in an order list are typically numbered or marked with bullets.

• Example:

  1. Item 1
  2. Item 2
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Q3. What is javascript
Ans. 
JavaScript is a high-level, interpreted programming language used for creating interactive websites.
• JavaScript is commonly used for client-side web development.

• It can be used to add interactivity to websites, such as form validation or dynamic content.

• JavaScript can also be used for server-side development with Node.js.

• Examples of JavaScript frameworks/libraries include React, Angular, and Vue.
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Q4. What is ===operator
Ans. 
=== operator is a strict equality operator in JavaScript that checks if two values are equal in both value and type.
• === operator returns true if both operands are of the same type and have the same value

• It does not perform type coercion, unlike the == operator

• Example: 5 === '5' will return false because the operands are of different types
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Q5. What is the main features of oop
Ans. 
Main features of OOP include encapsulation, inheritance, and polymorphism.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability to create new classes based on existing classes, inheriting their attributes and methods.

• Polymorphism: Ability for objects of different classes to respond to the same message in different ways.

• Example: Encapsulation - a class 'Car' wi...read more
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