According to the w3techs stats, nearly 14% of the websites are using Ubuntu Operating System. Most of the developers choose Linux for development and Ubuntu is the most prominent flavor. You can check the official stats of Ubuntu from here. Ubuntu package management system has most of the common utilities…

Git is the most widely used version control system. It keeps track of your changes and updates. Multiple people can collaborate efficiently and productively. To be productive in your team you should have a strong grip on this tool. …

Python is a powerful programming language, installed by default in Ubuntu operating system. If you want to install a different version of Python then you have two options, either you can install it from any repository like apt-get or you can install it from source code. But all Python versions…

Ubuntu is based on Debian and Linux Mint is based on Ubuntu. Although Linux Mint also owns a Debian-based version. Almost all Debian-based packages can be installed on Ubuntu. To create a package, different configurations are required which you will see down the road. To create a package for Ubuntu…

Python use List as a dynamic array to store data. List store data at contiguous memory location. Insertion and deletion of elements at the beginning in the list has O(n) complexity. Because these operations require the whole list of elements to move one location forward. Algorithmic complexity of List: Find…

Association is one of the most important concepts in object-oriented programming. It's difficult to develop well-structured software without having a strong grip on these concepts. It defines the communication rules between classes. Association: Its a relationship between two classes and that relationship is established through their objects. Each object has its…

The Strategy Pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. Strategy lets the algorithm vary independently from clients that use it. To understand the strategy design pattern, let's take an example of a transport system. You are developing an application, which provides the time estimation…

Like other programming languages PostgreSQL also support user-defined functions. User-defined functions can be written in SQL and C. It also supports procedural languages (PLs) PostgreSQL-pgSQL, Python, Perl, and Tcl. These four procedural languages are included in the stranded distribution of PostgreSQL. …

The transaction is defined as a single unit of task that can contain multiple operations. A transaction only marks completed when all of its operations are performed properly. It rollbacked when any of its operations fail at any point. A transaction must hold the properties of atomicity, consistency, durability, and…