The process of replacing original data with special-characters is called an Encryption. A highly secured server handles the encryption and Decryption. You need a private key to decrypt the data. Else, you cannot decrypt the data. Private keys are two types. The sender uses one private key and the receiver uses one other private key. I have given in this post about 8 encryption methods. Flow Diagram of Encryption image courtesy by digit.in   Different Encryption Methods Classic Cipher Random Key Generation RSA Token Hash Functions Mac value - Message Authentication code Key Hash TLS Protocol Authenticated Cipher  1. Classic Cipher. The best example is this kind of algorithm was used in world war -II communication machines. 2. Random Key Generations. One kind of security. They use an algorithm that sends random numbers. People use that number as a password.  3. RSA Token. Every 30 seconds a token is generated. Mostly people use for financial ap

For loop is main concept in Python programming. Out of all the For Loop options, the list option is so popular. If you know, how to use this concept, you can write any number of programs quickly and with less effort. Using for loop you can get index for list items. You can print list elements using for loop. If you take any language , the loops play a vital role. How to Use For Loop When you want to deal with data of multiple values, you need loops. So, For Loop is so famous because, you can control multiple input values. Syntax to Write For Loop for i in my_list: print(i) The 'i' says variable that represents value in the 'my_list'. The for helps to iterate the list values one by one. Example Program For Loop List in Python my_list=[2,3,4] for i in my_list: print(i) Result 2 3 4 How to create Multiplication Table using Python For-Loop List O

In AWS, Block and Object are two types of storage. I have given differences between these two. Why because storage is a prime concept in the cloud environment. Object Vs Block Storage Why are these names different? Because these two are different storage types - Object and Block. Object Storage Object means it is a single object. You are not dividing here. In the context of AWS, object storage helps your file to store as-is. How big it does not matter. Let your file size is 10MB. Then, it saves as a 10 MB file. What happens when you update a 30MB file. It deletes the old object and creates a brand new one. For small changes, you need to update the whole file. So, it utilizes a lot of resources. Object storage is much better for big files and very few changes. AWS manages object storage. AWS has full control over Object storage. Object Vs Block Block Storage Block storage divides your file into blocks. You have selected a block size of 512 bytes. If you want to upload a 10MB file, it th

Amazon Elastic Computing Cloud, you can call it EC2. Here're EC2 top security features and shared frequently asked interview questions on EC2. Based on your requirement, you can increase or decrease computing power. Before you enable the Autoscaling feature, you need to know its impacts since it's the Administrator's responsibility. AWS to Understand EC2 Security AWS EC2 Making your existing hardware to the requirement always is not so easy. So EC2 service in AWS helps you to allocate computing power according to your needs.  AWS EC2 instance acts as your physical server. It has a memory. You can increase the instance size in terms of CPU, Memory, Storage, and GPU.  EC2 auto scaling is a property, where it automatically increase your computing power. Security Features in EC2 Virtual Private Cloud. The responsibility of Virtual Private Cloud is to safeguard each instance separately. That means, you cannot access other instances, which are already created by other organiz

In Python, you can calculate the circle area easily by using the function. The purpose of Python is to use in data analysis. You need this logic in many areas. You can use in your present finance projects or new ones. Benefits of function you can re-use the same code number of times. Area of Circle=pi*r*r Area of Circle Steps Given - You Can do Using Two Methods, Explained Both Methods I have given steps to calculate the  area of a circle using two different methods. First I followed by creating a user-defined function. Next, directly I ran the formula in the interpreter.   Method -1 Steps I have followed to Calculate Area Using Function Logged into Cent Os (Linux) Create .py module Import .py module into Python Execute .py module  1. Log in I have first logged into CentOS. You can see there '$'. 2. Creating .py module To create ".py" module. You can use the vi editor command. You need 'import decimal' to

I am practicing Python programming. In this post, I have explained logic to calculate the factorial using a function. This  function  you can call it a user-defined function. The name of the function is factorial.py. In real-time, you can write a program in a file and run it in python console . The main task of a developer is to create functions for the reusable code. They call these functions whenever they need. Factorial calculation program for supplied input value.   Factorial Logic in Python. I have completed this logic in 3 steps. Write factorial.py Import Execute it Write Factorial.py  Here you need to define a function. Use 2 for loops, and write your logic. This is done on LInux operating system. You can also try on Linux. After, ESC command Use, :wq to come out of the module. Import Factorial.py Go to Python console, using 'python' command. Use import factorial.py command. Execute Factorial.py  >>> factorial.fa

Here's is the Python syntax errors cheat sheet. In Python, you can avoid errors, if you know syntax rules. These are missing semicolons, adding extra commas, and extra spaces. Further Python is case sensitive. So using the wrong identifier also will give error. Python Syntax Errors Cheat Sheet Indentation is unique to Python. You cannot find strict indentation in any other programming language. You need to focus on the three areas while writing a Python program. To avoid errors you need to learn indentation rules. Indentation or Syntax Errors Exceptions Handling Exceptions 1: Indentation If you do not follow the proper order, you will get an error. The details of one block shroud follow in one vertical line. The sub-block should be inside of that. In if loop, the IF, ELIF, and ELSE should have the same indentation. Not only, but the statement inside of them should also have the same indentation. Best Examples Understand these examples a good material on indentation for you. 2

Hyperledger is one of the top-listed blockchains. This architecture follows R3 Corda specifications. Sharing the interview questions with you that I have prepared for my interview. Though Ethereum leads in real-time applications. The latest Hyperledger version is now ready for production applications. It has now become stable for production applications. The Hyperledger is now backed by IBM. But, it is still an open source. These interview questions help you to read quickly. The below set of interview questions helps you like a tutorial on Hyperledger fabric. Hyperledger Fabric Interview Questions 1). What are Nodes? In Hyperledger the communication entities are called Nodes. 2). What are the three different types of Nodes? - Client Node - Peer Node - Order Node The Client node initiates transactions. The peer node commits the transaction. The order node guarantees delivery. 3). What is Channel? A channel in Hyperledger is the subnet of the main blockchain. You can ha