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Microservicessystem_design~10 mins

Why microservices exist - Test Your Understanding

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

Complete the code to identify the main reason microservices exist.

Microservices
Microservices help to improve [1] by breaking a large system into smaller parts.
Drag options to blanks, or click blank then click option'
Ascalability
Bcomplexity
Csecurity
Dcost
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing complexity because microservices reduce it but that's not the main reason.
2fill in blank
medium

Complete the code to explain a benefit of microservices.

Microservices
Microservices allow teams to work [1] on different parts of the system.
Drag options to blanks, or click blank then click option'
Aindependently
Bslowly
Ctogether
Drandomly
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing together because teams do collaborate but microservices focus on independence.
3fill in blank
hard

Fix the error in the statement about microservices.

Microservices
Microservices combine all functions into one large [1].
Drag options to blanks, or click blank then click option'
Aapplication
Bmonolith
Cdatabase
Dserver
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing application or server because they are general terms but not the error here.
4fill in blank
hard

Fill both blanks to describe microservices benefits.

Microservices
Microservices improve [1] and allow [2] deployment of features.
Drag options to blanks, or click blank then click option'
Ascalability
Bslow
Cindependent
Dsecurity
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing slow because microservices speed up deployment.
5fill in blank
hard

Fill all three blanks to explain microservices advantages.

Microservices
Microservices break a system into [1], enable [2] teams, and improve [3].
Drag options to blanks, or click blank then click option'
Asmall services
Bindependent
Cscalability
Dlarge modules
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing large modules because microservices avoid large blocks.

Practice

(1/5)
1. Why do organizations choose microservices over a single large application?
easy
A. To write all code in one programming language
B. To make the system run only on one server
C. To avoid using any databases
D. To break a big system into smaller, manageable parts

Solution

  1. Step 1: Understand the problem with large applications

    Large applications are hard to manage, update, and scale because everything is tightly connected.

  2. Step 2: Identify microservices benefit

    Microservices split the big system into smaller parts that can be managed and updated independently.

  3. Final Answer:

    To break a big system into smaller, manageable parts -> Option D

  4. Quick Check:

    Microservices = smaller parts [OK]
Hint: Microservices split big apps into small parts [OK]
Common Mistakes:
  • Thinking microservices run only on one server
  • Believing microservices avoid databases
  • Assuming microservices require one language
2. Which of the following is a key feature of microservices architecture?
easy
A. All services share the same database schema
B. Each service can be developed and deployed independently
C. Services must be written in the same programming language
D. Microservices require a monolithic deployment

Solution

  1. Step 1: Review microservices independence

    Microservices allow teams to develop and deploy each service without affecting others.

  2. Step 2: Check other options

    Sharing the same database or language is not required; monolithic deployment contradicts microservices.

  3. Final Answer:

    Each service can be developed and deployed independently -> Option B

  4. Quick Check:

    Independent deployment = microservices [OK]
Hint: Microservices = independent deploys [OK]
Common Mistakes:
  • Assuming all services share one database
  • Believing all code must be in one language
  • Thinking microservices deploy as one unit
3. Consider a system split into microservices: User Service, Order Service, and Payment Service. If the Order Service crashes, what is the likely impact on the User Service?
medium
A. User Service continues working independently
B. User Service will lose all user data
C. User Service will also crash immediately
D. User Service will restart automatically

Solution

  1. Step 1: Understand microservices isolation

    Each microservice runs independently, so failure in one does not crash others.

  2. Step 2: Analyze impact on User Service

    User Service can keep working even if Order Service crashes, though some features may be limited.

  3. Final Answer:

    User Service continues working independently -> Option A

  4. Quick Check:

    Microservices isolation = independent operation [OK]
Hint: Microservices fail independently, not together [OK]
Common Mistakes:
  • Assuming one service crash crashes all
  • Thinking user data is lost when order fails
  • Believing services auto-restart always
4. A team built a microservices system but notices that deploying one service requires stopping the entire system. What is the likely mistake?
medium
A. Services are tightly coupled and not independent
B. They are using too many programming languages
C. The database is too large
D. They did not write enough tests

Solution

  1. Step 1: Identify deployment problem

    If deploying one service stops the whole system, services are not independent as microservices require.

  2. Step 2: Rule out other options

    Programming languages, database size, or tests do not cause deployment to stop all services.

  3. Final Answer:

    Services are tightly coupled and not independent -> Option A

  4. Quick Check:

    Independent services = independent deploys [OK]
Hint: Independent deploy means no system-wide stop [OK]
Common Mistakes:
  • Blaming programming languages for deployment issues
  • Thinking database size causes deployment stop
  • Assuming tests affect deployment independence
5. A company wants to scale their online store quickly during sales. How does microservices architecture help achieve this?
hard
A. By forcing all services to scale together as one unit
B. By allowing only the payment service to scale independently
C. By enabling each service to scale based on its own demand
D. By removing the need for any scaling

Solution

  1. Step 1: Understand scaling in microservices

    Microservices let each part of the system scale separately depending on its load.

  2. Step 2: Apply to online store scenario

    During sales, services like Order or Payment can scale more without scaling unrelated services.

  3. Final Answer:

    By enabling each service to scale based on its own demand -> Option C

  4. Quick Check:

    Microservices scale independently = efficient scaling [OK]
Hint: Scale each service separately for efficiency [OK]
Common Mistakes:
  • Thinking only one service scales
  • Believing all services must scale together
  • Assuming microservices remove scaling needs