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What is Mobile Payment? Mobile payment is a type of payment which customers use to pay money when they go to purchase products or services. The devices that customers use for making payments are tablets and smartphones. There are many payment apps which can be installed on the mobile. Many banks have also adopted mobile payment technology and have launched many banking apps which customers can use to send and receive money. Types of Mobile Payment Mobile payment is of different types and we will discuss them in detail − 1. Mobile Wallets Mobile wallets are digital apps which can ... Read More
What is Green Hydrogen? Green hydrogen is a fuel which can be obtained with the help of electrolysis. The water is electrolyzed with the help of renewable energy sources like wind, or solar power. The aim behind producing green hydrogen is to use it as a fuel. This will help in limiting global warming to 1.5 degrees centigrade. The production of green hydrogen is expensive but will come down in the future. Types of Hydrogen Hydrogen is of many types and we will discuss them here in detail − 1. Green Hydrogen Green hydrogen can be made by electrolyzing water ... Read More
What is an Identity Column? The Identity column of a table is a column whose value increments consequently. This can be used to create unique identifiers, such as primary keys. Syntax Following is the syntax to create an Identity column. The initial setting for identity is represented as IDENTITY (1, 1). IDENTITY [ ( seed , increment ) ] Where − Seed: The seed determines the initial value of an ID, with a default setting of 1. Increment: This denotes the step value for ID increments, which also defaults ... Read More
In this article, we will understand the difference between CGI and servlet. Servlet is a Java class that helps servers to extend their abilities by hosting applications accessed using a request-response model. CGI behaves like middleware between www servers and external databases or information resources, helping pass data between the server and application. Difference between CGI and Servlet Some of the common differences between CGI and Servlet are as follows. S.NO ... Read More
Setting a Column Value to Null To set a column value to NULL, use the SQL UPDATE statement, which allows modification of existing records in a table. The basic syntax for setting a column value to NULL is − Syntax UPDATE table_name SET column_name = NULL WHERE conditions; Where − table_name: Replace this with the name of the table you intend to update. column_name: Substitute this with the name of the column to be updated. NULL: Denotes the NULL value in SQL. ... Read More
Data architecture design consists of standards that have certain rules, policies, and data types to be collected, from where the data is collected, storage of data, arrangement of data, and then using that data for further analysis. Data plays a vital role in the successful execution of business strategy. Data architecture design It helps us to show how users view the data in the database. It describes the type of data structures used to manage data and make the processing easy. the concept of dbms depends on its architecture. It is divided into three models i.e. conceptual model, ... Read More
Sometimes there is a requirement to fill in a minimum number of characters in a form. This ensures that the user inputs the correct data into the input field. In this article, we will see how to set the Minlength validation in HTML. What is Minlength Validation? In HTML the minlength is an attribute of the input tag of the form element. It is set in the input field to ensure that the users enter at least a minimum number of characters in the form input field. For example, while setting a password for ... Read More
In Java, state of the immutable object can’t be modified after it is created but definitely reference other objects. They are very useful in multi-threading environment because multiple threads can’t change the state of the object so immutable objects are thread-safe. Immutable objects are very helpful to avoid temporal coupling and always have failure atomicity and also helpful in multiple threading. Why though? because no one can change the object right? So, it becomes thread-safe, it means it will not cause any unexpected issues when different parts of the program are trying to access that particular object. On the other ... Read More
In Java, both Applets and Servlets are the programs or applications that run in a Java environment. Applets are designed to provide interactive features that can be embedded into web pages and allow users to engage with content directly through their web browsers. On the other hand, Servlets operate on the server side, they handle requests and responses, which is most important for generating dynamic content in web applications. The main difference in both programs is that their processing is done in different environments. Difference between Applets and Servlets Some of the major differences between Applets and Servlets are as ... Read More
Java provides two ways to append strings and make them one. These two methods are namely the concat() method and + operator to join strings together, but there are some important differences between how they work. The concat() method is a bit more specific and limited, while the + operator is more flexible. So, even though they do the same thing, understanding how and when to use each one can help in writing more efficient or cleaner code in Java. Concat() Vs + operator The following are the important differences between the concat method and the + operator. ... Read More