100+ Chetu Interview Questions and Answers

Normalization is a database design technique that organizes data in a structured manner to eliminate redundancy and improve data integrity.

• Normalization helps in reducing data redundancy by breaking down a large table into smaller, more manageable tables.

• There are different normal forms, such as 1NF, 2NF, 3NF, BCNF, and 4NF, each with specific rules and dependencies.

• Normalization ensures data integrity by minimizing data anomalies, such as update, insert, and delete anomalies...read more

To update PHP version, download the latest version from php.net, backup your files, update php.ini, and restart the server.

• Download the latest PHP version from php.net

• Backup your files before updating

• Update php.ini configuration file

• Restart the server to apply changes

Dispatcher servlet is the front controller of Spring MVC framework.

• It receives all incoming requests and delegates them to appropriate handlers.

• It uses HandlerMapping to map requests to appropriate handlers.

• It uses HandlerAdapter to invoke the appropriate handler method.

• It uses ViewResolver to resolve the view for the response.

• It is configured in web.xml or through Java configuration.

• Example: DispatcherServlet dispatcherServlet = new DispatcherServlet(context);

• Example: org.sp...read more

Join in SQL is used to combine rows from two or more tables based on a related column between them.

• Join is used to retrieve data from multiple tables based on a related column

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

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

Ad hoc testing is informal testing without any predefined test cases or plans.

• Ad hoc testing is performed without any specific test design or documentation.

• Testers explore the application freely to find defects.

• It is often used to quickly identify issues that may not be found through formal testing.

• Ad hoc testing can be done at any stage of the development process.

• Examples include randomly clicking on buttons, entering unexpected data, or using the application in unconvention...read more

Bootstrap is a front-end framework that helps in creating responsive websites by using a grid system and predefined classes.

• Bootstrap provides a grid system with 12 columns that automatically adjusts based on screen size.

• It includes responsive utility classes like 'd-none' and 'd-md-block' to show/hide content based on screen size.

• Bootstrap also offers responsive navigation components like the navbar that collapses into a hamburger menu on smaller screens.

cfset is used to set a variable value, while cfparam is used to initialize a variable if it does not already exist.

• cfset is used to assign a value to a variable, while cfparam is used to initialize a variable if it does not already have a value

• cfset can be used multiple times to change the value of a variable, while cfparam will only initialize the variable once

• Example: vs

Redux is a popular library for managing global state in React applications.

• Redux helps in managing the state of the entire application in a single store.

• It provides a predictable state container that can be accessed and modified using actions and reducers.

• Redux allows for a unidirectional data flow, making it easier to debug and trace changes in the application state.

• It is commonly used in large-scale applications where multiple components need access to shared state.

• Example:...read more

Hibernate is a popular Java ORM framework that simplifies database interactions by mapping Java objects to database tables.

• Hibernate is an ORM (Object-Relational Mapping) framework that allows developers to map Java objects to database tables and vice versa.

• It provides a way to perform database operations using Java objects without writing complex SQL queries.

• Hibernate handles the mapping of Java classes to database tables, and Java data types to SQL data types.

• It supports va...read more

Frameworks provide structure and pre-built components for software development, but can also limit flexibility and require learning curve.

• Advantage: Provides structure and pre-built components for faster development

• Advantage: Can improve code quality and maintainability

• Disadvantage: Can limit flexibility and customization

• Disadvantage: Requires learning curve and potential dependency issues

• Example: ReactJS provides a framework for building user interfaces

• Example: Ruby on Rails...read more

Database connection with CFML involves creating a datasource and using CFQUERY tag to interact with the database.

• Create a datasource in ColdFusion Administrator

• Use CFQUERY tag to execute SQL queries

• Use CFQUERYPARAM tag to prevent SQL injection

• Example: SELECT * FROM myTable

Selenium is a popular tool for automation testing

• Selenium is widely used for automating web applications

• It supports multiple programming languages like Java, Python, C#

• Selenium WebDriver is used for interacting with web elements

• Selenium Grid allows parallel execution on multiple browsers and platforms