1. What is Istio?
a) A container orchestration platform
b) A service mesh for connecting, securing, and managing microservices
c) A programming language
d) A database management system
Answer: b) A service mesh for connecting, securing, and managing microservices
2. Which programming languages are Istio components typically written in?
a) Java and C++
b) Go and Rust
c) Python and Ruby
d) JavaScript and TypeScript
Answer: b) Go and Rust
3. What is the primary purpose of Istio's data plane components?
a) Collecting and analyzing performance metrics
b) Handling routing and traffic management
c) Managing the Istio control plane
d) Securing Kubernetes clusters
Answer: b) Handling routing and traffic management
4. Which of the following is not a core Istio component?
a) Pilot
b) Mixer
c) Citadel
d) Helm
Answer: d) Helm
5. Which Istio component is responsible for policy and access control management?
a) Pilot
b) Mixer
c) Citadel
d) Galley
Answer: c) Citadel
6. In Istio, what is a "VirtualService"?
a) A representation of a Kubernetes pod
b) A way to define how requests to services should be routed
c) An Istio security mechanism
d) A virtual machine
Answer: b) A way to define how requests to services should be routed
7. Which Istio component enforces authentication and authorization policies for services?
a) Pilot
b) Mixer
c) Citadel
d) Galley
Answer: b) Mixer
8. What is the purpose of the "sidecar" proxy in an Istio deployment?
a) To serve as a load balancer
b) To monitor application logs
c) To intercept and manage network traffic to and from the service
d) To manage container orchestration
Answer: c) To intercept and manage network traffic to and from the service
9. What does Istio's "DestinationRule" resource define?
a) Rules for routing traffic within a cluster
b) Security policies for services
c) How traffic should be routed to external services
d) A type of virtual machine
Answer: b) Security policies for services
10. In Istio, what is the primary function of the "Pilot" component?
a) Managing certificate authorities
b) Orchestrating and distributing service discovery and routing configurations
c) Monitoring service health
d) Collecting and processing telemetry data
Answer: b) Orchestrating and distributing service discovery and routing configurations
11. Which Istio component is responsible for collecting and reporting telemetry data?
a) Pilot
b) Mixer
c) Citadel
d) Galley
Answer: b) Mixer
12. What is the purpose of the Istio "Control Plane"?
a) To manage Istio's data plane components
b) To store container images
c) To run application code
d) To host Istio's user interface
Answer: a) To manage Istio's data plane components
13. Which Istio component is responsible for certificate management and security policy enforcement?
a) Pilot
b) Mixer
c) Citadel
d) Galley
Answer: c) Citadel
14. What is the primary role of "Mixer" in Istio?
a) To manage routing rules
b) To collect telemetry data and enforce access control policies
c) To handle network load balancing
d) To maintain service discovery information
Answer: b) To collect telemetry data and enforce access control policies
15. How does Istio enhance the security of microservices?
a) By isolating all microservices from each other
b) By encrypting all traffic between microservices
c) By implementing firewall rules at the network level
d) By requiring strong authentication and authorization for service-to-service communication
Answer: d) By requiring strong authentication and authorization for service-to-service communication
16. Which Istio component is used to configure and manage the routing of traffic within the service mesh?
a) Pilot
b) Mixer
c) Citadel
d) Galley
Answer: a) Pilot
17. What is "Istio Gateway" used for in an Istio service mesh?
a) To provide external access to the services in the mesh
b) To manage Istio configuration
c) To route traffic within the mesh
d) To collect telemetry data
Answer: a) To provide external access to the services in the mesh
18. What is the main benefit of using Istio's "VirtualService" resource?
a) It enables service-to-service communication over UDP.
b) It allows services to communicate directly without intermediaries.
c) It provides fine-grained control over how traffic is routed and load balanced.
d) It enforces strict security policies for all services.
Answer: c) It provides fine-grained control over how traffic is routed and load balanced.
19. In Istio, what is a "ServiceEntry" used for?
a) To define security policies for services
b) To expose external services to the mesh
c) To define routing rules for services
d) To define load balancing policies for services
Answer: b) To expose external services to the mesh
20. How does Istio handle load balancing for service-to-service communication?
a) It uses round-robin load balancing by default.
b) It relies on the Kubernetes load balancer service.
c) It does not support load balancing.
d) It uses a complex machine learning algorithm.
Answer: a) It uses round-robin load balancing by default.
21. Which of the following is not a type of traffic splitting mechanism in Istio?
a) Weighted routing
b) Percentage-based routing
c) Fault injection
d) Round-robin routing
Answer: d) Round-robin routing
22. In Istio, what does "Timeout" refer to in the context of traffic routing?
a) The amount of time a service has to respond to a request
b) The time it takes for a packet to traverse the network
c) The total duration of a service call
d) The duration of a service's idle time
Answer: a) The amount of time a service has to respond to a request
23. What is a "Circuit Breaker" in Istio used for?
a) To open and close electrical circuits in data centers
b) To prevent excessive load on a service by failing fast when errors occur
c) To monitor the flow of electricity in the network
d) To enforce encryption between services
Answer: b) To prevent excessive load on a service by failing fast when errors occur
24. Which Istio feature allows you to introduce artificial delays, errors, or aborts in service-to-service communication for testing and fault tolerance purposes?
a) Retries
b) Timeout
c) Circuit Breaker
d) Fault Injection
Answer: d) Fault Injection
25. What is the primary goal of "Dark Launching" in Istio?
a) To launch services in the dark web
b) To perform security audits
c) To test new features with a subset of users before full deployment
d) To hide services from external access
Answer: c) To test new features with a subset of users before full deployment
26. Which Istio feature helps in limiting and controlling the rate of incoming requests to a service?
a) Fault Injection
b) Retries
c) Rate Limiting
d) Timeout
Answer: c) Rate Limiting
27. How does Istio help with observability of microservices?
a) By providing a centralized logging system
b) By allowing services to print logs to the console
c) By collecting and exposing metrics and traces for service communication
d) By preventing services from generating logs
Answer: c) By collecting and exposing metrics and traces for service communication
28. Which Istio component is responsible for collecting and exporting telemetry data to external systems like Prometheus and Grafana?
a) Pilot
b) Mixer
c) Citadel
d) Galley
Answer: b) Mixer
29. What is "distributed tracing" in the context of Istio?
a) A technique for tracking the distribution of service requests across a network of services
b) A method for encrypting data in transit
c) A way to balance loads in a distributed system
d) A type of network topology
Answer: a) A technique for tracking the distribution of service requests across a network of services
30. How does Istio assist with traffic encryption in a service mesh?
a) By automatically encrypting all service-to-service communication
b) By using plain text for communication to reduce overhead
c) By relying on external encryption tools
d) By only encrypting sensitive data
Answer: a) By automatically encrypting all service-to-service communication
31. What is the purpose of "mTLS" (Mutual Transport Layer Security) in Istio?
a) To secure HTTP traffic
b) To provide service-to-service authentication and encryption
c) To manage routing rules
d) To monitor service performance
Answer: b) To provide service-to-service authentication and encryption
Top comments (0)