Top 50 linkerd Interview Questions with Answers

linkerd Interview Questions with Answers

1. What is Linkerd?

a. A programming language
b. A service mesh
c. A cloud provider

Answer: b

2. Which programming language is Linkerd written in?

a. Java
b. Go
c. Python

Answer: b

3. Which container orchestrator does Linkerd support?

a. Kubernetes
b. Docker Swarm
c. Mesos

Answer: a

4. What is the main purpose of Linkerd?

a. To increase application performance
b. To manage microservices communication
c. To provide cloud infrastructure

Answer: b

5. Which of the following features does Linkerd provide?

a. Load balancing
b. Routing
c. Service discovery
d. All of the above

Answer: d

6. How does Linkerd manage traffic between microservices?

a. Through TCP/IP packets
b. Through HTTP requests
c. Through UDP packets

Answer: b

7. What is the default Linkerd dashboard URL?

a. http://localhost:9990/dashboard
b. http://localhost:3000/dashboard
c. http://localhost:8080/dashboard

Answer: b

8. Which command is used to install Linkerd in a Kubernetes cluster?

a. kubectl apply -f linkerd.yaml
b. kubectl create -f linkerd.yaml
c. kubectl install -f linkerd.yaml

Answer: a

9. Which command is used to check Linkerd version?

a. linkerd version
b. version linkerd
c. run linkerd version

Answer: a

10. What is the purpose of a Linkerd proxy?

a. To manage traffic between microservices
b. To provide load balancing for microservices
c. To cache responses from microservices

Answer: a

11. What is the difference between Linkerd and Istio?

a. Linkerd only supports Kubernetes, while Istio supports multiple container orchestrators
b. Istio provides more advanced features than Linkerd
c. Linkerd is easier to use than Istio

Answer: b

12. Which company developed Linkerd?

a. Google
b. Amazon
c. Buoyant

Answer: c

13. What is the main benefit of using Linkerd in a microservices architecture?

a. Easier management of microservices communication
b. Increased security for microservices
c. Faster deployment of microservices

Answer: a

14. How does Linkerd handle traffic encryption between microservices?

a. By using TLS
b. By using SSL
c. By using HTTPS

Answer: a

15. What is the purpose of a Linkerd control plane?

a. To manage Linkerd proxies
b. To provide load balancing for microservices
c. To cache responses from microservices

Answer: a

16. Which Linkerd component is responsible for monitoring and reporting on microservices traffic?

a. Linkerd dashboard
b. Linkerd controller
c. Linkerd telemetry

Answer: c

17. Which command is used to inject Linkerd into a Kubernetes deployment?

a. kubectl apply -f linkerd.yaml
b. kubectl create -f linkerd.yaml
c. linkerd inject deployment.yaml | kubectl apply -f –

Answer: c

18. Which protocol does Linkerd use for service discovery?

a. DNS
b. HTTP
c. UDP

Answer: a

19. Which command is used to set up automatic Linkerd proxy injection for a specific namespace in Kubernetes?

a. linkerd inject namespace
b. linkerd namespace enable-autoproxy
c. linkerd profile namespace

Answer: b

20. How does Linkerd handle circuit breaking for microservices?

a. By using automatic retries
b. By dropping requests after a certain threshold
c. By redirecting traffic to other available instances

Answer: b

21. Which command is used to get detailed metrics about Linkerd proxies?

a. linkerd stat
b. linkerd dashboard
c. linkerd metrics

Answer: a

22. What is the purpose of a Linkerd service profile?

a. To define how a microservice can be called
b. To define how a microservice can call other microservices
c. To define the load balancing strategy for a microservice

Answer: a

23. Which of the following container runtimes is supported by Linkerd?

a. Docker
b. rkt
c. Both a and b

Answer: c

24. Which architecture pattern is commonly used in microservices and supported by Linkerd?

a. Monolithic architecture
b. Service-oriented architecture
c. Peer-to-peer architecture

Answer: b

25. How does Linkerd handle retries for failed requests between microservices?

a. By using automatic retries
b. By dropping the request
c. By redirecting traffic to other available instances

Answer: a

26. Which command is used to check the Linkerd control plane logs?

a. linkerd logs
b. linkerd dashboard logs
c. linkerd control logs

Answer: a

27. Which of the following protocols does Linkerd support for microservices communication?

a. gRPC
b. REST
c. Both a and b

Answer: c

28. What is the purpose of a Linkerd identity controller?

a. To authenticate microservices
b. To manage microservices keys and certificates
c. To authorize microservices communication

Answer: b

29. Which command is used to check the Linkerd proxy logs?

a. linkerd logs
b. linkerd dashboard logs
c. linkerd proxy logs

Answer: c

30. Which command is used to generate a Linkerd service profile for a microservice?

a. linkerd profile
b. linkerd profile generate
c. linkerd generate

Answer: b

31. How does Linkerd handle distributed tracing for microservices?

a. By using OpenTracing
b. By using Jaeger
c. By using Zipkin
d. All of the above

Answer: d

32. Which command is used to set up Linkerd to use an external tracing system such as Jaeger?

a. linkerd inject jaeger.yaml | kubectl apply -f –
b. linkerd jaeger setup
c. linkerd install jaeger

Answer: a

33. What is the purpose of a Linkerd destination policy?

a. To define how a microservice can be called
b. To define how a microservice can call other microservices
c. To define the traffic splitting ratio between microservices

Answer: c

34. Which of the following tools can be used to measure Linkerd performance?

a. Prometheus
b. Grafana
c. Both a and b

Answer: c

35. Which command is used to uninstall Linkerd from a Kubernetes cluster?

a. kubectl delete -f linkerd.yaml
b. kubectl remove -f linkerd.yaml
c. kubectl uninstall -f linkerd.yaml

Answer: a

36. What is the purpose of a Linkerd traffic split?

a. To define how a microservice can be called
b. To define how a microservice can call other microservices
c. To define the traffic splitting ratio between microservices

Answer: c

37. Which command is used to check the Linkerd telemetry data?

a. linkerd cartographer
b. linkerd telemetry
c. linkerd metrics

Answer: b

38. How does Linkerd handle service mesh upgrades?

a. By using rolling upgrades
b. By upgrading all components at once
c. By replacing all proxies

Answer: a

39. Which command is used to set up automatic Linkerd proxy injection for a specific deployment in Kubernetes?

a. linkerd namespace enable-autoproxy
b. linkerd inject deployment.yaml | kubectl apply -f –
c. linkerd profile deployment

Answer: b

40. What is the purpose of a Linkerd gateway?

a. To proxy traffic between microservices and external clients
b. To provide load balancing for microservices
c. To cache responses from microservices

Answer: a

41. Which of the following security features does Linkerd provide?

a. mTLS
b. RBAC
c. JWT authentication
d. All of the above

Answer: d

42. Which command is used to check the Linkerd gateway logs?

a. linkerd logs
b. linkerd dashboard logs
c. linkerd gateway logs

Answer: c

43. What is the purpose of a Linkerd resilience controller?

a. To handle circuit breaking for microservices
b. To handle retries for failed requests between microservices
c. To handle timeouts for microservices communication

Answer: c

44. Which command is used to check the Linkerd resilience controller logs?

a. linkerd logs
b. linkerd dashboard logs
c. linkerd resilience logs

Answer: c

45. How does Linkerd handle timeouts for microservices communication?

a. By using configurable timeouts
b. By dropping the request after a certain threshold
c. By redirecting traffic to other available instances

Answer: a

46. What is the purpose of a Linkerd tap?

a. To collect logs from microservices
b. To collect metrics from microservices
c. To debug microservices communication

Answer: c

47. Which programming language is used to write Linkerd controllers?

a. Go
b. Java
c. Python

Answer: a

48. Which command is used to get a list of all Linkerd resources in a Kubernetes cluster?

a. kubectl get linkerd
b. linkerd get all
c. kubectl get all -l linkerd.io/control-plane-ns=linkerd

Answer: c

49. What is the purpose of a Linkerd inject configuration?

a. To configure automatic proxy injection for a specific deployment
b. To configure telemetry data collection for a specific namespace
c. To configure traffic splitting for a specific deployment

Answer: a

50. Which command is used to check the status of Linkerd proxies in a Kubernetes cluster?

a. kubectl describe pods -l linkerd.io/control-plane-component=proxy
b. linkerd status
c. linkerd dashboard

Answer: a

Ashwani Kumar
Latest posts by Ashwani Kumar (see all)
0 0 votes
Article Rating
Subscribe
Notify of
guest

0 Comments
Inline Feedbacks
View all comments
0
Would love your thoughts, please comment.x
()
x