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Serverless vs PaaS vs IaaS decision in Azure - Interactive Practice

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Practice - 5 Tasks
Answer the questions below
1fill in blank
easy

Complete the code to select the Azure service type for running code without managing servers.

Azure
service_type = "[1]"  # Choose the serverless option
Drag options to blanks, or click blank then click option'
AAzure Functions
BAzure Blob Storage
CAzure Virtual Machines
DAzure App Service
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing a service that requires managing servers.
2fill in blank
medium

Complete the code to select the Azure service type that provides managed platform for web apps.

Azure
service_type = "[1]"  # Choose the PaaS option
Drag options to blanks, or click blank then click option'
AAzure App Service
BAzure Functions
CAzure Virtual Machines
DAzure Storage Accounts
Attempts:
3 left
💡 Hint
Common Mistakes
Confusing serverless with PaaS.
3fill in blank
hard

Fix the error in selecting the Azure service type for full control over virtual machines.

Azure
service_type = "[1]"  # Choose the IaaS option
Drag options to blanks, or click blank then click option'
AAzure SQL Database
BAzure Functions
CAzure App Service
DAzure Virtual Machines
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing managed services instead of virtual machines.
4fill in blank
hard

Fill both blanks to match the service type with its description.

Azure
service_type = "[1]"  # runs code without server management
service_description = "[2]"
Drag options to blanks, or click blank then click option'
AAzure Functions
BRuns code on demand without managing servers
CAzure Virtual Machines
DProvides full control over OS and software
Attempts:
3 left
💡 Hint
Common Mistakes
Mixing service names with wrong descriptions.
5fill in blank
hard

Fill all three blanks to complete the decision logic for choosing Azure service types.

Azure
if need_full_control:
    service = "[1]"
elif want_managed_platform:
    service = "[2]"
else:
    service = "[3]"
Drag options to blanks, or click blank then click option'
AAzure App Service
BAzure Functions
CAzure Virtual Machines
DAzure SQL Database
Attempts:
3 left
💡 Hint
Common Mistakes
Swapping service types or mixing up conditions.

Practice

(1/5)
1. Which Azure service model lets you run your code without worrying about managing servers and charges you only when your code runs?
easy
A. Serverless
B. PaaS
C. IaaS
D. On-premises servers

Solution

  1. Step 1: Understand Serverless model

    Serverless runs your code without managing servers and charges based on usage.

  2. Step 2: Compare with PaaS and IaaS

    PaaS provides a platform but you still deploy apps; IaaS requires managing virtual machines.

  3. Final Answer:

    Serverless -> Option A

  4. Quick Check:

    Serverless = code runs without server management [OK]
Hint: Serverless = no server management, pay per execution [OK]
Common Mistakes:
  • Confusing PaaS with Serverless
  • Thinking IaaS is serverless
  • Assuming on-premises is cloud
2. Which Azure service model requires you to manage virtual machines and network settings yourself?
easy
A. Serverless
B. SaaS
C. PaaS
D. IaaS

Solution

  1. Step 1: Identify IaaS responsibilities

    IaaS gives full control over virtual machines and network settings, so you manage them.

  2. Step 2: Contrast with other models

    Serverless and PaaS abstract server management; SaaS is software delivered fully managed.

  3. Final Answer:

    IaaS -> Option D

  4. Quick Check:

    IaaS = manage VMs and network [OK]
Hint: IaaS means managing your own virtual machines [OK]
Common Mistakes:
  • Mixing PaaS with IaaS management level
  • Thinking Serverless requires VM management
  • Confusing SaaS with IaaS
3. You want to deploy a web app quickly without managing servers but need some control over the environment. Which Azure model fits best?
medium
A. Serverless
B. PaaS
C. IaaS
D. On-premises

Solution

  1. Step 1: Analyze deployment needs

    Quick deployment without server management suggests Serverless or PaaS.

  2. Step 2: Consider control over environment

    Serverless offers less control; PaaS provides a ready platform with some environment control.

  3. Final Answer:

    PaaS -> Option B

  4. Quick Check:

    PaaS = quick deploy + some control [OK]
Hint: PaaS balances ease and control for app deployment [OK]
Common Mistakes:
  • Choosing Serverless when environment control is needed
  • Picking IaaS for quick deployment
  • Confusing on-premises with cloud models
4. A developer deployed an app on Azure IaaS but forgot to configure the network security group. What is the likely issue?
medium
A. App is exposed to the internet without protection
B. App will not run because code is missing
C. Azure automatically secures the app by default
D. App will run serverless without VMs

Solution

  1. Step 1: Understand IaaS network responsibility

    In IaaS, you must configure network security groups to protect VMs and apps.

  2. Step 2: Consequence of missing security group

    Without it, the app is exposed to the internet without firewall protection.

  3. Final Answer:

    App is exposed to the internet without protection -> Option A

  4. Quick Check:

    IaaS needs manual network security setup [OK]
Hint: IaaS needs manual network security setup [OK]
Common Mistakes:
  • Assuming Azure auto-secures IaaS apps
  • Thinking app won't run without code
  • Confusing serverless with IaaS
5. Your company needs to run a batch job that runs only a few minutes every day, with minimal management and cost. Which Azure model should you choose?
hard
A. IaaS with dedicated VMs running 24/7
B. PaaS with always-on app service
C. Serverless functions triggered by schedule
D. On-premises servers scheduled manually

Solution

  1. Step 1: Analyze job characteristics

    The batch job runs briefly daily, so paying for always-on resources wastes money.

  2. Step 2: Match model to cost and management needs

    Serverless functions run only when triggered, minimizing cost and management.

  3. Step 3: Eliminate other options

    IaaS and PaaS keep resources running continuously, increasing cost; on-premises adds manual overhead.

  4. Final Answer:

    Serverless functions triggered by schedule -> Option C

  5. Quick Check:

    Short, infrequent jobs = Serverless [OK]
Hint: Use serverless for short, infrequent tasks to save cost [OK]
Common Mistakes:
  • Choosing always-on VMs for short jobs
  • Picking PaaS without considering cost
  • Ignoring serverless scheduling options