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A long time ago, when people built things on computers, they sometimes had a problem. They wanted to share their creations with others, but it was really hard to do because everyone's computer was different, like having different types of Lego blocks, or having a different version of NodeJS, Mongo or JS, having a different set of environment variables, or even working on different Operating systems.
So, a smart person named Solomon Hykes thought of an idea. He wanted to make it easy for people to put their creations in special boxes, like lunchboxes, so that these creations could work on any computer, no matter what Lego blocks (local configuration) it had.
That's how Docker started! It's like putting your favorite toys in special boxes so you can take them to your friend's house and play with them there. These special boxes are called "containers."
# This is a Dockerfile! It's like a recipe to make a special box for our computer toys.
# First, we need a special box to start with. We'll use a box that already has some things inside it.
FROM magic_box
# Now, we want to put our favorite toy car inside the special box.
ADD toy_car /toys/
# We also want to add some yummy snacks, like cookies, to our box.
ADD cookies /snacks/
# We can even write down a note to remind ourselves to share this box with our friends.
LABEL note="Please share with friends!"
# Finally, we'll close the box and seal it up. Now, our special box is ready!
Docker makes it super simple for people to share their computer creations with others. It's like sharing your toys with friends without worrying about them getting mixed up or broken.
So, Docker is like a magical way to keep things neat and tidy when sharing stuff between computers. It's like having special lunchboxes for your computer games and making them easy to share with friends.
Cool, right?
- Agile Testing Life Cycle involves constant testing, integration, and delivery in stages - unit testing, integration testing, functional, and non-functional testing, system testing, and user acceptance testing. - Agile Software Development Life Cycle focuses on smaller cycles with five main components: analysis, design, coding, testing, and deployment. The seven phases of SDLC (planning, requirements, design, build, test, deploy, maintain) fit within this framework. - The bug life cycle in Agile maps the journey of a bug from discovery to resolution. It helps track, manage, and correct software bugs. - The Software Testing Life Cycle (STLC) guides testing tasks with six phases: requirement analysis, test planning, test case development, test environment setup, test execution, test cycle closure. - In Agile STLC, identified and tested new requirements can occur during a current sprint. - The Defect Life Cycle in Agile Software Testing starts when a defect is found and ends with its resolution. Tools like Jira help manage defects by logging, tracking, and alerting team members for prompt action.
- Scrum Masters act as coaches, facilitating the team's use of Scrum and helping them improve their skills, while Project Managers have a more directive role, steering projects to completion. - Scrum Masters employ Scrum methodologies, focusing on incremental progress, whereas Project Managers use traditional project management techniques, overseeing the entire project from start to end. - Scrum Masters guide the team's flow without imposing deadlines; Project Managers operate on a strict project timeline. - The Scrum Master's role focuses on serving the team and reinforcing Scrum principles, while the Project Manager's role encompasses planning, executing, and closing projects. - Certifications for Scrum Masters include Certified ScrumMaster (CSM), whereas Project Management Professional (PMP) is popular among Project Managers.
- A Fractional CTO is a part-time tech executive who creates tech strategies aligned with business visions, oversees system upgrades, audits, staff training, and ensures effective communication within the company. - Ideal hiring times include the scaling-up stage, when a full-time CTO isn't affordable, or during business transitions or significant projects. - Fractional CTOs differ from full-time CTOs by offering flexible expertise across multiple businesses rather than consistent oversight in one. - Cost of a Fractional CTO varies, with the median wage around $10,000 to $15,000 per month, influenced by experience, expertise, and time requirements. - Fractional CTOs can be found via online platforms like LinkedIn, Indeed, and CTO Academy, as well as networking events. - Benefits include fresh perspectives, fostering innovation, leading in product development and technology adoption, and boosting business success. - To become a Fractional CTO, one needs robust tech knowledge, business strategy insight, significant people skills, continuous learning, leadership experiences, and wide networking.
