What is cloud computing in AWS - Visual Explanation

Process Flow - What is cloud computing

User Needs Computing

↓

User Connects to Cloud

↓

Cloud Provider Offers Resources

↓

User Uses Resources Remotely

↓

User Pays for What They Use

↓

Cloud Scales Resources as Needed

Cloud computing lets users access and use computing resources over the internet, paying only for what they use, with the cloud provider managing the hardware.

Execution Sample

AWS

User requests server
Cloud allocates server
User runs app on server
User stops server
Cloud frees server

This shows how a user requests and uses a server in the cloud, then releases it when done.

Process Table

Step	Action	System Response	User Impact
1	User requests a server	Cloud checks availability	User waits for server allocation
2	Cloud allocates server	Server is ready to use	User can start using server
3	User runs application	Server runs app smoothly	User gets app service
4	User stops server	Cloud marks server as free	User stops paying for server
5	Cloud frees server resources	Resources become available for others	Cloud optimizes resource use

💡 User stops server, cloud frees resources, ending the session

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	Final
Server Status	Not allocated	Requested	Allocated	Running app	Stopped	Freed
User Cost	0	0	Starts billing	Billing continues	Stops billing	0

Key Moments - 2 Insights

Why does the user not need to own physical servers?

Because the cloud provider manages the hardware and allocates servers on demand, as shown in execution_table steps 1 and 2.

How does the user pay for cloud resources?

The user pays only while the server is allocated and running, as seen in variable_tracker where User Cost starts billing after step 2 and stops after step 4.

Visual Quiz - 3 Questions

Look at the execution_table, what is the server status after step 3?

A Requested

B Allocated

C Running app

D Stopped

💡 Hint

Check the 'Server Status' row in variable_tracker after step 3

At which step does the user stop paying for the server?

A Step 2

B Step 4

C Step 3

D Step 5

💡 Hint

Look at 'User Cost' in variable_tracker; billing stops after step 4

If the user never stops the server, what happens to the cloud resources?

A Resources remain allocated and user keeps paying

B Cloud frees resources automatically

C Server status becomes 'Stopped'

D User cost resets to zero

💡 Hint

Refer to execution_table steps 4 and 5 where stopping server frees resources and billing stops

Concept Snapshot

Cloud computing means using computing power and storage over the internet.
Users request resources like servers from a cloud provider.
The provider allocates and manages hardware remotely.
Users pay only for what they use, scaling up or down easily.
This removes the need to own physical servers.

Full Transcript

Cloud computing allows users to access computing resources like servers and storage over the internet. When a user needs a server, they request it from the cloud provider. The provider checks availability and allocates the server. The user runs their applications on this server and pays only while using it. When finished, the user stops the server, and the cloud frees the resources for others. This model removes the need for users to own physical hardware and allows flexible, on-demand computing.

Practice

1. What is the main benefit of cloud computing compared to owning physical computers?

easy

A. You can use computing resources over the internet without buying hardware.

B. You get faster internet speeds at home.

C. You have to manage all the physical servers yourself.

D. You pay a fixed monthly fee regardless of usage.

Solution

1. Step 1: Understand cloud computing basics

   Cloud computing means using computers and storage through the internet instead of owning them physically.

2. Step 2: Compare options

   You can use computing resources over the internet without buying hardware. correctly states the main benefit: no need to buy hardware, just use resources online. Other options are incorrect because they mention unrelated or wrong facts.

3. Final Answer:

   You can use computing resources over the internet without buying hardware. -> Option A

4. Quick Check:

   Cloud computing = use internet resources [OK]

Hint: Cloud means using internet computers, not your own [OK]

Common Mistakes:

• Thinking cloud means faster home internet
• Believing you must manage physical servers
• Assuming fixed cost regardless of use

2. Which of the following is the correct way to describe cloud computing?

easy

A. Renting computing power and storage over the internet.

B. Connecting to a local printer.

C. Using a USB drive to store files.

D. Buying and installing software on your local computer.

Solution

1. Step 1: Define cloud computing

   Cloud computing means renting or using computing resources like servers and storage through the internet.

2. Step 2: Evaluate options

   Renting computing power and storage over the internet. matches this definition. Options A, B, and C describe local or unrelated actions, not cloud computing.

3. Final Answer:

   Renting computing power and storage over the internet. -> Option A

4. Quick Check:

   Cloud = rent internet resources [OK]

Hint: Cloud means renting, not buying software locally [OK]

Common Mistakes:

• Confusing cloud with local software installation
• Thinking cloud is just external storage devices
• Mixing cloud with local hardware connections

3. If a company uses cloud computing, what happens when they need more storage suddenly?

medium

A. They must buy new physical hard drives and install them.

B. They can quickly add more storage online without delay.

C. They have to wait weeks for new hardware delivery.

D. They lose all their existing data.

Solution

1. Step 1: Understand cloud flexibility

   Cloud computing allows users to increase or decrease resources like storage instantly through the internet.

2. Step 2: Analyze options

   They can quickly add more storage online without delay. correctly states this quick scalability. Options A and B describe physical hardware delays, and D is incorrect as data is not lost.

3. Final Answer:

   They can quickly add more storage online without delay. -> Option B

4. Quick Check:

   Cloud scales storage fast = They can quickly add more storage online without delay. [OK]

Hint: Cloud scales resources instantly online [OK]

Common Mistakes:

• Assuming physical hardware is needed for scaling
• Thinking scaling takes weeks
• Believing data is lost when scaling

4. A user tries to access cloud storage but gets an error. Which is the most likely cause?

medium

A. The cloud storage is a physical device unplugged.

B. The cloud provider deleted all data automatically.

C. The user's computer is turned off.

D. The user's internet connection is down.

Solution

1. Step 1: Identify cloud access requirements

   Accessing cloud storage requires a working internet connection.

2. Step 2: Evaluate error causes

   The user's internet connection is down. is the most common cause: no internet means no cloud access. Options B, C, and D are unlikely or incorrect because cloud data is not deleted automatically, and cloud storage is not a physical device on the user's side.

3. Final Answer:

   The user's internet connection is down. -> Option D

4. Quick Check:

   No internet = no cloud access [OK]

Hint: Check internet first if cloud access fails [OK]

Common Mistakes:

• Assuming cloud deletes data randomly
• Thinking local computer state affects cloud data
• Confusing cloud storage with local devices

5. A startup wants to save money by using cloud computing. Which approach best fits this goal?

hard

A. Buy many servers upfront to avoid monthly fees.

B. Hire staff to manage physical data centers.

C. Use cloud services and pay only for what they use.

D. Avoid cloud and use only local computers.

Solution

1. Step 1: Understand cloud cost model

   Cloud computing charges based on actual usage, so you pay only for what you use, saving money especially for startups.

2. Step 2: Compare options for cost saving

   Use cloud services and pay only for what they use. matches this pay-as-you-go model. Options A, C, and D involve high upfront costs or management overhead, not cost-saving.

3. Final Answer:

   Use cloud services and pay only for what they use. -> Option C

4. Quick Check:

   Cloud pay-per-use = cost saving [OK]

Hint: Cloud pay-as-you-go saves money for startups [OK]

Common Mistakes:

• Thinking buying servers upfront is cheaper
• Ignoring management costs of physical data centers
• Avoiding cloud due to misunderstanding costs