Google Interview Questions and Answers

Serialisation is the process of converting an object into a format that can be easily stored or transmitted.

• Serialisation is used in data storage and transmission, allowing objects to be saved to a file or sent over a network.

• It is commonly used in programming languages to convert objects into a byte stream for storage or communication.

• Examples include saving an object to a file in JSON or XML format, or sending an object over a network using protocols like HTTP.

SQL is a programming language used for managing and manipulating relational databases.

• SQL stands for Structured Query Language.

• It is used to communicate with and manipulate databases.

• SQL can be used to retrieve data, update data, insert data, and delete data from databases.

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE.

• Examples of SQL database systems include MySQL, PostgreSQL, Oracle, SQL Server.

Java is a high-level programming language known for its portability, security, and object-oriented features.

• Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM).

• It is object-oriented, allowing for the creation of reusable code through classes and objects.

• Java is known for its security features, such as sandboxing and encryption.

• It supports multithreading, allowing for concurrent execution of multiple tasks.

• Java has a rich standard l...read more

MVC architecture is a software design pattern that separates an application into three main components: Model, View, and Controller.

• Model represents the data and business logic of the application

• View is responsible for displaying the data to the user

• Controller acts as an intermediary between Model and View, handling user input and updating the Model accordingly

• Example: In a web application, the Model could be a database, the View could be the HTML/CSS for the user interface, ...read more

Promises are a feature in JavaScript that allow asynchronous operations to be handled in a more organized and readable way.

• Promises are objects that represent the eventual completion or failure of an asynchronous operation.

• They are used to handle asynchronous code and avoid callback hell.

• Promises have three states: pending, fulfilled, or rejected.

• They can be chained together using methods like .then() and .catch().

• Promises can be created using the Promise constructor or by us...read more