1. What is Consul primarily used for?
a) Load balancing
b) Service discovery
c) Configuration management
d) Database management
Answer: b) Service discovery
2. Which protocol does Consul use for service discovery?
a) HTTP
b) DNS
c) LDAP
d) SMTP
Answer: b) DNS
3. In Consul, what is the role of the Consul agent?
a) Service registry
b) Load balancing
c) Configuration storage
d) Authentication
Answer: a) Service registry
4. What is the purpose of Consul's health checks?
a) To secure communication between services
b) To monitor the health of services
c) To manage configuration files
d) To balance the load between services
Answer: b) To monitor the health of services
5. Which query language is used in Consul for service discovery?
a) SQL
b) CQL
c) HCL
d) XSLT
Answer: c) HCL (HashiCorp Configuration Language)
6. How can you register a service in Consul?
a) Using the consul-register command
b) Via the Consul web interface
c) By editing the service configuration file
d) All of the above
Answer: d) All of the above
7. Which Consul component is responsible for handling gossip and consensus?
a) Consul Server
b) Consul Agent
c) Consul Proxy
d) Consul UI
Answer: a) Consul Server
8. What is the primary datacenter in Consul?
a) Datacenter-A
b) Primary-DC
c) dc1
d) main
Answer: c) dc1
9. Which feature in Consul is used for preventing network partitioning?
a) Raft consensus algorithm
b) Gossip protocol
c) ACLs (Access Control Lists)
d) Service mesh
Answer: a) Raft consensus algorithm
10. What is the purpose of Consul's Connect feature?
a) Load balancing
b) Secure service-to-service communication
c) Configuration management
d) Service discovery
Answer: b) Secure service-to-service communication
11. Which command is used to start a Consul agent in server mode?
a) consul server
b) consul agent -server
c) consul start-server
d) consul run
Answer: b) consul agent -server
12. In Consul, which API endpoint allows you to query the health of a service?
a) /v1/catalog/service
b) /v1/health/service
c) /v1/service/health
d) /v1/service/query
Answer: b) /v1/health/service
13. How can you configure ACLs (Access Control Lists) in Consul?
a) Using the consul-acl command
b) Editing the ACL configuration file
c) Through the Consul web interface
d) All of the above
Answer: c) Through the Consul web interface
14. Which programming languages are officially supported by Consul's client libraries?
a) Python and Ruby
b) Java and C#
c) Go, Python, and Ruby
d) JavaScript and PHP
Answer: c) Go, Python, and Ruby
15. What is the purpose of Consul's session feature?
a) To manage user sessions
b) To control access to the Consul UI
c) To establish locks and leader elections
d) To store user preferences
Answer: c) To establish locks and leader elections
16. What is the default Consul port for the HTTP API?
a) 8500
b) 8080
c) 80
d) 443
Answer: a) 8500
17. Which protocol can Consul use for RPC (Remote Procedure Call) communication?
a) HTTP
b) gRPC
c) WebSocket
d) UDP
Answer: b) gRPC
18. What is the primary use case for Consul's key-value store?
a) Storing large binary data
b) Service configuration and feature flags
c) User authentication data
d) Log storage
Answer: b) Service configuration and feature flags
19. Which Consul component provides a web-based user interface for management and monitoring?
a) Consul Server
b) Consul Agent
c) Consul UI
d) Consul Proxy
Answer: c) Consul UI
20. What is the primary benefit of using Consul as part of a microservices architecture?
a) Efficient database management
b) Service discovery and dynamic configuration
c) Load balancing
d) Automated testing
Answer: b) Service discovery and dynamic configuration
21. How does Consul handle service failures and crashes?
a) It automatically restarts failed services.
b) It relies on external monitoring tools.
c) It uses health checks to detect failures and update the service catalog.
d) It doesn't handle service failures.
Answer: c) It uses health checks to detect failures and update the service catalog.
22. Which Consul component is responsible for routing and proxying traffic between services?
a) Consul Server
b) Consul Agent
c) Consul Proxy
d) Consul Load Balancer
Answer: c) Consul Proxy
23. What is the main goal of Consul's intention policy?
a) Load balancing
b) Security and access control
c) Service discovery
d) Configuration management
Answer: b) Security and access control
24. Which of the following is not a valid Consul datacenter configuration option?
a) Datacenter name
b) Datacenter IP address
c) Gossip encryption key
d) Datacenter tags
Answer: b) Datacenter IP address
25. What is the purpose of Consul's WAN (Wide Area Network) federation?
a) To replicate data between datacenters over long distances
b) To connect services within the same datacenter
c) To perform remote backups of service data
d) To share data with external organizations
Answer: a) To replicate data between datacenters over long distances
26. Which feature in Consul provides service-level authentication and authorization?
a) Connect
b) Intention policies
c) ACLs
d) Encryption
Answer: b) Intention policies
27. In Consul, what is a service mesh?
a) A type of proxy server
b) A container orchestration platform
c) A network of interconnected microservices
d) A tool for service discovery
Answer: c) A network of interconnected microservices
28. How can you enable TLS encryption for communication in Consul?
a) By editing the service configuration file
b) By setting the "tls_enabled" option in the Consul configuration file
c) By using Consul's TLS API
d) By running the "consul enable-tls" command
Answer: b) By setting the "tls_enabled" option in the Consul configuration file
29. What is the primary purpose of Consul's "join" command?
a) To join a Consul cluster as a new server
b) To join a service mesh
c) To join a load balancing pool
d) To join an existing network
Answer: a) To join a Consul cluster as a new server
30. What is the primary advantage of using Consul for service discovery compared to DNS-based solutions?
a) Lower latency
b) Built-in load balancing
c) Caching of DNS records
d) Simplicity of setup
Answer: b) Built-in load balancing
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