1️⃣ What is Cloud Computing and Why Does it Matter?
Imagine you have a big LEGO set at home, but instead of buying every single piece, you can
borrow the pieces you need, exactly when you need them. Cloud computing is kind of like
that, but for computers.
Instead of owning huge computers, storage, or software, you use them over the internet—
this is called “the cloud.”
You pay only for what you use, and if you need more, you can get it instantly.
This saves money, time, and makes your computer tasks faster and easier.
💡 Example: If you want to play a game that needs a super-powerful computer, instead of
buying it, you can just rent one in the cloud for a few hours.
2️⃣ What is Azure?
Azure is Microsoft’s cloud playground.
It’s a place where businesses can store data, run apps, and do analytics without needing
giant computers in their office.
Azure is like a huge digital toolbox. You have tools for building websites, storing files,
sending emails, analyzing data, and much more.
💡 Example: Think of Azure like a giant LEGO factory online—you can build anything without
owning the factory yourself.
3️⃣ How is Azure Different from Other Clouds?
There are other clouds too, like AWS (Amazon) and GCP (Google).
Azure is especially good if a company already uses Microsoft products, like Windows or
Excel.
It connects easily with tools like Office 365, Teams, and Power BI, which is super handy.
Some companies even use more than one cloud at the same time—this is called a
multicloud strategy.
,💡 Fun analogy: Azure is like having a Swiss Army knife if you love Microsoft gadgets—it just
works perfectly with what you already have.
4️⃣ What is the AZ-900 Certification?
AZ-900 is like earning your first cloud badge.
It proves you understand the basics of Azure and cloud computing.
You don’t need to be a computer genius; it’s for anyone who wants to know what Azure
can do.
💡 Who can take it? IT workers, developers, or even curious people who just want to
understand Azure.
5️⃣ Why Take AZ-900?
To know how the cloud works and what Azure can do.
To understand basic Azure services, pricing, and management.
To show employers you have foundational cloud knowledge.
6️⃣ What Does the Exam Look Like?
44 multiple-choice questions
60 minutes to finish
3 main parts:
1. Cloud concepts (25–30%) → “What is the cloud?”
2. Azure architecture (35–40%) → “How Azure works”
3. Azure management & governance (30–35%) → “How to control and manage Azure”
Passing score: 700 out of 1000 points
You see results immediately after finishing
Can be taken online or at a test center
Valid for 2 years, then you need to renew
💡 Tip: You can retake the exam 5 times a year, but there’s a small waiting period between
attempts.
,So, in short:
Cloud = rent computing power online
Azure = Microsoft’s giant toolbox in the cloud
AZ-900 = your beginner badge to prove you know Azure basics
1️⃣ Cloud Computing Models
Imagine clouds like different playgrounds for computers. Each one is a little different.
A) Public Cloud ☁️
This is like a community playground everyone can use.
Managed by a company like Microsoft Azure, AWS, or Google Cloud.
You share resources with other users, and you pay only for what you use.
Pros:
No need to buy hardware.
Low monthly fees (pay-as-you-go).
Cons:
You don’t control the playground (features or versions).
No physical access—you can’t touch the servers.
B) Private Cloud 🏰
This is like your own private playground at home.
Only your organization can use it.
Usually on-premises (your office) or in a dedicated data center.
Pros:
Complete control of infrastructure.
More security and privacy.
Can still get some benefits of public cloud if designed well.
, Cons:
You must maintain it yourself.
Need staff to manage it.
C) Hybrid Cloud 🌥️
This is a mix of public and private playgrounds.
Lets you share data and apps between both.
Often used to extend existing IT systems.
Pros:
Avoids disruptions and outages.
Meets governance and regulatory needs.
Combines best of public + private cloud.
Reduces large upfront costs (CapEx).
Cons:
Infrastructure can be complex to manage.
2️⃣ Cloud Service Models
Think of cloud services like three layers of responsibility.
A) Infrastructure as a Service (IaaS) 🖥️
You get virtual computers, storage, and networks from the cloud.
You manage everything from the operating system up.
Pay only for what you use.
Examples in Azure:
Azure Virtual Machines
Azure Virtual Network
Azure Storage
Azure ExpressRoute
Imagine you have a big LEGO set at home, but instead of buying every single piece, you can
borrow the pieces you need, exactly when you need them. Cloud computing is kind of like
that, but for computers.
Instead of owning huge computers, storage, or software, you use them over the internet—
this is called “the cloud.”
You pay only for what you use, and if you need more, you can get it instantly.
This saves money, time, and makes your computer tasks faster and easier.
💡 Example: If you want to play a game that needs a super-powerful computer, instead of
buying it, you can just rent one in the cloud for a few hours.
2️⃣ What is Azure?
Azure is Microsoft’s cloud playground.
It’s a place where businesses can store data, run apps, and do analytics without needing
giant computers in their office.
Azure is like a huge digital toolbox. You have tools for building websites, storing files,
sending emails, analyzing data, and much more.
💡 Example: Think of Azure like a giant LEGO factory online—you can build anything without
owning the factory yourself.
3️⃣ How is Azure Different from Other Clouds?
There are other clouds too, like AWS (Amazon) and GCP (Google).
Azure is especially good if a company already uses Microsoft products, like Windows or
Excel.
It connects easily with tools like Office 365, Teams, and Power BI, which is super handy.
Some companies even use more than one cloud at the same time—this is called a
multicloud strategy.
,💡 Fun analogy: Azure is like having a Swiss Army knife if you love Microsoft gadgets—it just
works perfectly with what you already have.
4️⃣ What is the AZ-900 Certification?
AZ-900 is like earning your first cloud badge.
It proves you understand the basics of Azure and cloud computing.
You don’t need to be a computer genius; it’s for anyone who wants to know what Azure
can do.
💡 Who can take it? IT workers, developers, or even curious people who just want to
understand Azure.
5️⃣ Why Take AZ-900?
To know how the cloud works and what Azure can do.
To understand basic Azure services, pricing, and management.
To show employers you have foundational cloud knowledge.
6️⃣ What Does the Exam Look Like?
44 multiple-choice questions
60 minutes to finish
3 main parts:
1. Cloud concepts (25–30%) → “What is the cloud?”
2. Azure architecture (35–40%) → “How Azure works”
3. Azure management & governance (30–35%) → “How to control and manage Azure”
Passing score: 700 out of 1000 points
You see results immediately after finishing
Can be taken online or at a test center
Valid for 2 years, then you need to renew
💡 Tip: You can retake the exam 5 times a year, but there’s a small waiting period between
attempts.
,So, in short:
Cloud = rent computing power online
Azure = Microsoft’s giant toolbox in the cloud
AZ-900 = your beginner badge to prove you know Azure basics
1️⃣ Cloud Computing Models
Imagine clouds like different playgrounds for computers. Each one is a little different.
A) Public Cloud ☁️
This is like a community playground everyone can use.
Managed by a company like Microsoft Azure, AWS, or Google Cloud.
You share resources with other users, and you pay only for what you use.
Pros:
No need to buy hardware.
Low monthly fees (pay-as-you-go).
Cons:
You don’t control the playground (features or versions).
No physical access—you can’t touch the servers.
B) Private Cloud 🏰
This is like your own private playground at home.
Only your organization can use it.
Usually on-premises (your office) or in a dedicated data center.
Pros:
Complete control of infrastructure.
More security and privacy.
Can still get some benefits of public cloud if designed well.
, Cons:
You must maintain it yourself.
Need staff to manage it.
C) Hybrid Cloud 🌥️
This is a mix of public and private playgrounds.
Lets you share data and apps between both.
Often used to extend existing IT systems.
Pros:
Avoids disruptions and outages.
Meets governance and regulatory needs.
Combines best of public + private cloud.
Reduces large upfront costs (CapEx).
Cons:
Infrastructure can be complex to manage.
2️⃣ Cloud Service Models
Think of cloud services like three layers of responsibility.
A) Infrastructure as a Service (IaaS) 🖥️
You get virtual computers, storage, and networks from the cloud.
You manage everything from the operating system up.
Pay only for what you use.
Examples in Azure:
Azure Virtual Machines
Azure Virtual Network
Azure Storage
Azure ExpressRoute
