ITC Infotech Principal Consultant Interview Questions and Answers

Program to check if a given number is a palindrome or not.

• Convert the number to a string

• Reverse the string

• Compare the reversed string with the original string

• If they are equal, the number is a palindrome

SQL query for join

• Use JOIN keyword to combine rows from two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the join condition

• Types of join: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN

• Example: SELECT * FROM table1 JOIN table2 ON table1.column = table2.column

Event loop is a mechanism in Node.js that allows non-blocking I/O operations to be performed efficiently.

• Event loop is responsible for handling all the I/O operations in Node.js

• It is a single-threaded loop that constantly checks for new events in the event queue

• When an event is detected, the corresponding callback function is executed

• Event loop allows Node.js to handle multiple requests simultaneously without blocking ...read more

Test cases in Node.js can be written using testing frameworks like Mocha, Jest, and Chai.

• Choose a testing framework that suits your project requirements

• Write test cases for each function or module in your code

• Use assertions to check if the expected output matches the actual output

• Mock external dependencies to isolate the code being tested

• Run tests using the testing framework's command line interface or integration with

Java is a statically typed language while Node.js is a runtime environment for JavaScript.

• Java is compiled while Node.js is interpreted

• Java is better for large-scale enterprise applications while Node.js is better for real-time applications

• Java has a larger community and more libraries while Node.js has a simpler and more lightweight architecture

• Java is used for Android app development while Node.js is used for server-...read more

Agile process is an iterative approach to software development that emphasizes flexibility, collaboration, and customer satisfaction.

• Agile process involves breaking down a project into smaller, manageable chunks called sprints

• Each sprint involves planning, designing, coding, testing, and reviewing

• Agile process emphasizes continuous feedback and adaptation to changing requirements

• Examples of agile methodologies include

There are various deployment methods/tools available such as Jenkins, Ansible, Docker, Kubernetes, etc.

• Jenkins is a popular tool for continuous integration and deployment

• Ansible is a configuration management tool that can also be used for deployment

• Docker and Kubernetes are containerization tools that can simplify deployment

• Deployment methods can vary depending on the technology stack and infrastructure

• Deployment can b

MongoDB is a NoSQL database with flexible schema and high scalability, but lacks transaction support.

• Advantages: flexible schema, high scalability, easy to use, supports sharding and replication

• Disadvantages: lacks transaction support, not suitable for complex transactions, limited query functionality compared to SQL databases

• Example: MongoDB is used by companies like eBay, Forbes, and The Guardian for their high scala