CentraLogic Interview Questions and Answers

Session, DOM, and events are key concepts in web development.

• Session: a way to store information about a user across multiple pages or visits on a website

• DOM (Document Object Model): a programming interface for web documents that allows scripts to dynamically access and update the content, structure, and style of a webpage

• Events: actions or occurrences that happen in the system or user's interaction that the system can...read more

A palindrome is a string that reads the same forwards and backwards. This can be checked programmatically.

• A simple approach is to reverse the string and compare it to the original.

• Example: 'racecar' reversed is 'racecar', so it's a palindrome.

• Consider case sensitivity: 'A man a plan a canal Panama' is a palindrome ignoring spaces and case.

• Use two pointers: one at the start and one at the end, moving towards the center.

• ...read more

The DOM (Document Object Model) is a programming interface for web documents, representing the structure of a webpage as a tree of objects.

• The DOM allows scripts to update the content, structure, and style of a document dynamically.

• It represents the document as a tree of nodes, where each node is an object representing a part of the document.

• For example, in HTML, each element (like <div>, <p>, <a>) is...read more

Sequelize is a promise-based Node.js ORM for Postgres, MySQL, MariaDB, SQLite, and Microsoft SQL Server.

• Sequelize is an Object-Relational Mapping (ORM) library for Node.js.

• It supports multiple database systems like Postgres, MySQL, MariaDB, SQLite, and Microsoft SQL Server.

• Sequelize allows developers to work with databases using JavaScript objects instead of SQL queries.