OLD SDLC

{Development Team}

Developer 1 –> Developer 2 –> > Build & Integration Team -> Ensures Code Compiles -> Package Developer 3 –>

Operations Team

Package is given with instructions to operations team

The Operations team deploys the app and then testers test.

#Cons

1. Integrating different modules is error prone task as integration team communicates with developers to integrate each developers modules into a single unite.
2. Defects are detected late.
3. Any intermediate code merge can cause issues.
4. If a developer brings up functional defect, it will stay there until the end of iteration which may take too long.
5. Long Feedback cycle
6. Long Iteration

Continuous Integration

Continuous integration is a development practice that requires developers to integrate code into a shared repo several times a day.

Spring Boot Banners

In this endpoint of internet, we’ll explore how to create a custom banner in a Spring Boot application.

Overview

When a Spring Boot application starts, it prints a banner, a visual representation, or text (often with ASCII graphics or branding information). The banner is a way to provide a more engaging and informative startup experience for developers and users such as the application name, version, or any other relevant data.

What is Docker?

• Docker is an open platform for developing, shipping and running applications.
• Docker is a platform which packages an application and all its dependencies together in the form of containers.

What problem does Docker solve?

The main problem it solves is dependency management.

Docker Architecture

Some Terms to Understand

1. Docker Daemon: Daemon is a program which runs on our computer and manages docker containers.
2. Docker file: It is a text document which contains all the commands that a user can call on the command line to assemble an image.
3. Images: Template to create docker container.
4. Container: Running instance of docker image.Containers hold entire package to run application.

Basic Commands for Docker

• Check the version

docker -v

• pull image

docker pull <image-name>

• check all the images

docker images

• search images

docker search <image-name>

• container creation

docker run <image-name>

• list all the running containers

docker ps

• list all the running + stopped containers

docker ps -a

• run container in background(detached mode) + change the name of container.

docker run --name <custom-name> -d <image-name/image-id>

• run container in -it {interactive-mode}, your container will run continuously

docker run --name <custom-name> -it -d <image-id/name> 

• to execute the command inside your container

docker exec -it <container-id> command{python3/bash/java/cpp} 

• get all the information about the container

docker inspect <container-id>

• stop the running container

docker stop <containerName>

• remove image

docker rm <image-name>

• to restart the running container

docker restart <container-id>

My-SQL Image Commands

• get the image

docker install mysql

• run the mysql container

docker run --name <custome-mysql-name> -e MYSQL_ROOT_PASSWORD=<give-a-pass> -d mysql

• use commands inside mysql container

docker exec -it <custom-sql-name> <command-type>

Docker for Touchstone MCQ Test

1. Docker Basics

• What is Docker?
• Benefits of using Docker
• Docker vs Virtual Machines
• Docker Architecture
  • Docker Engine
  • Docker Daemon
  • Docker Client

2. Docker Images

• What is a Docker Image?
• Layers in Docker Images
• Docker Hub and Image Registries
• Pulling Images
  docker pull
• Listing Images
  docker images
• Removing Images
  docker rmi
• Custom Images using Dockerfile
  (See Dockerfile section below)

3. Docker Containers

• What is a Container?
• Creating Containers
  docker run
• Listing Containers
  docker ps, docker ps -a
• Starting/Stopping/Removing Containers
  docker start, docker stop, docker rm
• Inspecting Containers
  docker inspect
• Container Lifecycle
• Running containers in detached mode
  -d
• Executing commands inside containers
  docker exec, docker attach
• Logs and Terminal access
  docker logs, docker exec -it

4. Dockerfile (Creating Custom Images)

• What is a Dockerfile?
• Basic Dockerfile Instructions
  • FROM
  • RUN
  • COPY
  • ADD
  • CMD
  • ENTRYPOINT
  • EXPOSE
  • ENV
  • WORKDIR
• Building Image from Dockerfile
  docker build
• Best practices
  • Minimizing layers
  • Using .dockerignore

5. Docker Volumes (Data Persistence)

• What is a Volume?
• Types
  • Volumes
  • Bind Mounts
• Creating Volumes
  docker volume create
• Mounting Volumes to Containers
  -v or --mount
• Inspecting Volumes
  docker volume inspect
• Volume Persistence and Sharing between Containers

6. Docker Networking

• Default Docker Networks
  • bridge
  • host
  • none
• Creating Custom Networks
  docker network create
• Connecting Containers to Networks
  --network
• Inspecting Networks
  docker network inspect
• Communication between containers
  Via network name

7. Docker Compose (Multi-container Applications)

• What is Docker Compose?
• docker-compose.yml file structure
  • version
  • services
  • build
  • ports
  • volumes
  • depends_on
  • networks
• Running with Compose
  docker-compose up, docker-compose down
• Building and Rebuilding
  docker-compose build, docker-compose up --build
• Scaling services
  docker-compose up --scale
• Use cases and benefits

Exploring Chennai: City Meets Coastal Charm

Chennai, the vibrant capital of Tamil Nadu, offers a unique blend of culture, history, and modernity. From serene beaches to bustling markets, the city has something for everyone.

Beach Bliss

One hidden gem is Olive Beach in Thoraipakkam. This peaceful spot is ideal for relaxation and offers picturesque views—perfect for turtle sightings too.

Navigating the City

Chennai’s public transportation—Metro Rail, suburban trains, and buses—makes commuting efficient. Be cautious of auto-rickshaw scams; using ride-hailing apps is often safer and more economical, You Can use Rapido, Ola, Uber.

Types of Software Testing

What is PL/SQL?

1. PL/SQL stands for Procedural Language Extension to SQL
2. It is a Extension of SQL developed by Oracle.
3. It adds SQL capabilities of procedural programming like variables, loops and conditional statements in SQL.

PL/SQL Architecture

Physical Architecture

• PL/SQL engine processes the entire PL/SQL block of code.
• It Separate SQL statements and Procedural statements.

Simple Architecture Flow

PL/SQL Logical Architecture

• Corporates with SQL Engine.
• Enables Subprograms -> Allows re-usability of code/script like variables and functions.
• Dynamic Queries-> We can modify or create new Queries.
• Case Insensitivity
• Optimizer-> It optimizes our code for better performance.
• Enables Object-Oriented Programming
• Web Development #Extras Context Switching: When you write SQL Query in PL/SQL the PL/SQL send the query to SQL Engine and the result will be returned this operation is called Context Switching.

Pluggable Database

Objective

As part of the Elite Tech Park - Zoho Creator Assessment, I developed a Library System application in Zoho Creator. The app features robust validations, workflows, and dynamic reporting to ensure efficient library management.

• Watch the Demo Video: A comprehensive walkthrough of the application’s functionalities and workflows.
• Download the Application (.ds file): Access the complete application file for deployment.
• YOUTUBE~Video Youtube Link:

Below, I explain what the application offers and how it works.