Top 50 interview questions and answers for etcd

1. What is etcd?

Etcd is a distributed key-value store used for storing configuration data, service discovery, and coordination.

2. Who created etcd?

Etcd was created by CoreOS, which is now a part of Red Hat.

3. What programming languages can be used with etcd?

Etcd has client libraries available for Go, Java, Python, Ruby, and more.

4. What is the default port for etcd?

The default port for etcd is 2379.

5. What is the difference between etcd and ZooKeeper?

Etcd is simpler and easier to use than ZooKeeper, but ZooKeeper has more features and is more mature.

6. What is the Raft consensus algorithm?

The Raft consensus algorithm is used by etcd to ensure that all nodes in the cluster agree on the state of the data.

7. What is the maximum size of a value in etcd?

The maximum size of a value in etcd is 1MB.

8. What is the maximum number of keys that can be stored in etcd?

There is no hard limit on the number of keys that can be stored in etcd, but performance may degrade as the number of keys increases.

9. What is the difference between etcdctl and etcd?

Etcdctl is a command-line tool used for interacting with etcd, while etcd is the etcd server itself.

10. What is the etcd API?

The etcd API is a RESTful API used for interacting with etcd.

11. What is the etcd watch API?

The etcd watch API allows clients to watch for changes to specific keys in etcd.

12. What is the etcd discovery API?

The etcd discovery API is used for service discovery in etcd.

13. What is the etcd lock API?

The etcd lock API is used for distributed locking in etcd.

14. What is the etcd lease API?

The etcd lease API is used for managing leases in etcd.

15. What is the etcd snapshot API?

The etcd snapshot API is used for backing up and restoring etcd data.

16. What is the etcd proxy API?

The etcd proxy API is used for load balancing and routing in etcd.

17. What is the etcd authentication API?

The etcd authentication API is used for authenticating clients in etcd.

18. What is the etcd authorization API?

The etcd authorization API is used for authorizing clients in etcd.

19. What is the etcd metrics API?

The etcd metrics API is used for monitoring etcd performance.

20. What is the etcd health API?

The etcd health API is used for checking the health of etcd nodes.

21. What is the etcd cluster API?

The etcd cluster API is used for managing etcd clusters.

22. What is the etcdctl member command?

The etcdctl member command is used for managing etcd cluster members.

23. What is the etcdctl endpoint command?

The etcdctl endpoint command is used for managing etcd endpoints.

24. What is the etcdctl snapshot command?

The etcdctl snapshot command is used for backing up and restoring etcd data.

25. What is the etcdctl watch command?

The etcdctl watch command is used for watching for changes to specific keys in etcd.

26. What is the etcdctl lease command?

The etcdctl lease command is used for managing leases in etcd.

27. What is the etcdctl lock command?

The etcdctl lock command is used for distributed locking in etcd.

28. What is the etcdctl put command?

The etcdctl put command is used for setting a key-value pair in etcd.

29. What is the etcdctl get command?

The etcdctl get command is used for getting the value of a key in etcd.

30. What is the etcdctl del command?

The etcdctl del command is used for deleting a key in etcd.

31. What is the etcdctl ls command?

The etcdctl ls command is used for listing keys in etcd.

32. What is the etcdctl mk command?

The etcdctl mk command is used for creating a directory in etcd.

33. What is the etcdctl rm command?

The etcdctl rm command is used for deleting a directory in etcd.

34. What is the etcdctl update command?

The etcdctl update command is used for updating the value of a key in etcd.

35. What is the etcdctl watch command?

The etcdctl watch command is used for watching for changes to specific keys in etcd.

36. What is the etcdctl lease grant command?

The etcdctl lease grant command is used for granting a lease in etcd.

37. What is the etcdctl lease revoke command?

The etcdctl lease revoke command is used for revoking a lease in etcd.

38. What is the etcdctl lease timetolive command?

The etcdctl lease timetolive command is used for getting the time to live of a lease in etcd.

39. What is the etcdctl lease keepalive command?

The etcdctl lease keepalive command is used for keeping a lease alive in etcd.

40. What is the etcdctl lock command?

The etcdctl lock command is used for acquiring a lock in etcd.

41. What is the etcdctl unlock command?

The etcdctl unlock command is used for releasing a lock in etcd.

42. What is the etcdctl auth enable command?

The etcdctl auth enable command is used for enabling authentication in etcd.

43. What is the etcdctl auth disable command?

The etcdctl auth disable command is used for disabling authentication in etcd.

44. What is the etcdctl auth status command?

The etcdctl auth status command is used for checking the status of authentication in etcd.

45. What is the etcdctl auth add-user command?

The etcdctl auth add-user command is used for adding a user to etcd.

46. What is the etcdctl auth delete-user command?

The etcdctl auth delete-user command is used for deleting a user from etcd.

47. What is the etcdctl auth change-password command?

The etcdctl auth change-password command is used for changing a user’s password in etcd.

48. What is the etcdctl auth list-users command?

The etcdctl auth list-users command is used for listing all users in etcd.

49. What is the etcdctl auth grant-role command?

The etcdctl auth grant-role command is used for granting a role to a user in etcd.

50. What is the etcdctl auth revoke-role command?

The etcdctl auth revoke-role command is used for revoking a role from a user in etcd.

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