Why cloud over on-premises in AWS - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Benefits of Cloud vs On-Premises: Cost

Which of the following is a key cost advantage of using cloud services over on-premises infrastructure?

A You pay only for what you use, avoiding upfront hardware costs

B You must buy all hardware upfront, increasing capital expenses

C You need to hire more staff to maintain cloud servers

D Cloud services require long-term contracts with fixed costs

💡 Hint

Think about how cloud billing works compared to buying physical servers.

Cloud services use a pay-as-you-go model, so you avoid large upfront costs typical of on-premises setups.

❓ Architecture

intermediate

Scalability Differences: Cloud vs On-Premises

Which option best describes how cloud infrastructure handles scaling compared to on-premises?

A Cloud scaling is fixed and cannot be adjusted after setup

B On-premises can scale instantly by adding virtual machines; cloud requires weeks to add hardware

C Both cloud and on-premises require manual hardware installation to scale

D Cloud can quickly add or remove resources on demand; on-premises scaling is slower and limited

💡 Hint

Consider how cloud providers manage resources behind the scenes.

Cloud providers offer elastic scaling, allowing resources to be adjusted quickly without physical hardware changes.

❓ security

advanced

Security Responsibility Model

In the cloud shared responsibility model, which security aspect is the cloud provider responsible for?

A Managing customer data encryption keys by default

B Configuring user access permissions within applications

C Physical security of data centers and hardware maintenance

D Monitoring user activity logs for suspicious behavior

💡 Hint

Think about what the cloud provider controls versus what the customer controls.

The cloud provider secures the physical infrastructure, while customers manage access and data security configurations.

✅ Best Practice

advanced

Disaster Recovery in Cloud vs On-Premises

Which cloud feature best improves disaster recovery compared to traditional on-premises setups?

A Automated backups across multiple geographic regions

B Manual tape backups stored onsite

C Single data center with redundant power supplies

D Physical copies of data stored in locked cabinets

💡 Hint

Consider how cloud providers handle data durability and availability.

Cloud providers replicate data automatically across regions, enabling fast recovery from failures.

❓ service_behavior

expert

Cloud Elasticity Impact on Application Performance

An application hosted on cloud infrastructure experiences sudden traffic spikes. Which cloud behavior best explains how the application maintains performance?

A Cloud limits traffic to prevent overload by rejecting new requests

B Cloud automatically adds more compute instances to handle increased load

C Cloud requires manual intervention to add resources during traffic spikes

D Cloud shuts down unused instances to save costs during spikes

💡 Hint

Think about how cloud elasticity helps applications during high demand.

Cloud elasticity allows automatic scaling of resources to maintain performance during traffic spikes.

Practice

1. Why do many businesses choose cloud computing over on-premises servers?

easy

A. Because on-premises servers are always faster

B. Because cloud lets them avoid buying and managing physical servers

C. Because cloud requires more physical space

D. Because on-premises servers are cheaper to maintain

Solution

1. Step 1: Understand cost and management differences

   On-premises servers need buying, setup, and ongoing management which costs time and money.

2. Step 2: Compare with cloud benefits

   Cloud removes the need to buy physical servers and handles management, saving money and effort.

3. Final Answer:

   Because cloud lets them avoid buying and managing physical servers -> Option B

4. Quick Check:

   Cloud saves money and effort [OK]

Hint: Cloud avoids physical server costs and management [OK]

Common Mistakes:

• Thinking on-premises is always cheaper
• Confusing physical space needs
• Assuming cloud is slower

2. Which of the following is a correct reason to prefer cloud over on-premises?

easy

A. Cloud allows easy scaling to match your needs anytime

B. On-premises servers can be accessed from anywhere without internet

C. Cloud needs you to buy more hardware

D. On-premises servers automatically update without manual work

Solution

1. Step 1: Review cloud scaling feature

   Cloud lets you increase or decrease resources quickly as your needs change.

2. Step 2: Check other options for accuracy

   Options A, B, and D are incorrect because cloud does not require buying hardware, on-premises needs internet for remote access, and updates often require manual effort.

3. Final Answer:

   Cloud allows easy scaling to match your needs anytime -> Option A

4. Quick Check:

   Cloud scaling [OK]

Hint: Cloud scales resources easily anytime [OK]

Common Mistakes:

• Thinking cloud needs more hardware
• Believing on-premises is internet-free for remote access
• Assuming on-premises updates are automatic

3. Consider this scenario: A company uses cloud services and suddenly needs more storage. What happens next?

medium

A. They need to wait weeks for hardware delivery

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

C. They can quickly increase storage through the cloud provider's console

D. They have to shut down services to add storage

Solution

1. Step 1: Understand cloud resource flexibility

   Cloud providers allow users to add resources like storage instantly via online tools.

2. Step 2: Contrast with on-premises process

   On-premises requires buying and installing hardware, which takes time and may need downtime.

3. Final Answer:

   They can quickly increase storage through the cloud provider's console -> Option C

4. Quick Check:

   Cloud quick resource increase [OK]

Hint: Cloud storage scales fast via console [OK]

Common Mistakes:

• Confusing cloud with physical hardware buying
• Assuming downtime is needed for cloud scaling
• Thinking cloud scaling takes weeks

4. A company tries to access their on-premises server remotely but fails. What is a likely cause?

medium

A. They need to buy more physical servers

B. Cloud services do not allow remote access

C. On-premises servers always allow remote access by default

D. They forgot to connect the server to the internet

Solution

1. Step 1: Identify remote access requirements

   On-premises servers need proper internet connection and configuration to be accessed remotely.

2. Step 2: Evaluate options for correctness

   They forgot to connect the server to the internet correctly points to missing internet connection; B and C are false statements; A is unrelated to access issues.

3. Final Answer:

   They forgot to connect the server to the internet -> Option D

4. Quick Check:

   Remote access needs internet [OK]

Hint: Remote access needs internet connection [OK]

Common Mistakes:

• Thinking cloud disallows remote access
• Assuming on-premises remote access is automatic
• Confusing hardware purchase with access issues

5. A startup wants to launch a website that might get very popular suddenly. Why is cloud a better choice than on-premises for this?

hard

A. Cloud can automatically scale resources up or down based on traffic

B. On-premises servers handle sudden traffic spikes better

C. Cloud requires buying extra servers in advance

D. On-premises servers are easier to access from anywhere

Solution

1. Step 1: Understand traffic scaling needs

   A sudden increase in website visitors needs quick resource scaling to avoid slowdowns or crashes.

2. Step 2: Compare cloud and on-premises scaling

   Cloud can automatically adjust resources instantly; on-premises needs manual hardware changes which are slow and costly.

3. Step 3: Eliminate incorrect options

   Options B, C, and D are incorrect because on-premises is less flexible, cloud does not require buying extra servers upfront, and cloud access is easier.

4. Final Answer:

   Cloud can automatically scale resources up or down based on traffic -> Option A

5. Quick Check:

   Cloud auto-scaling fits sudden traffic [OK]

Hint: Cloud auto-scales for traffic spikes [OK]

Common Mistakes:

• Believing on-premises handles spikes better
• Thinking cloud needs pre-bought servers
• Confusing access ease between cloud and on-premises