Multiple Choice Questions on Load Balancers and API Gateways PDF

Add the following multiple choice questions and answers and explanations verbatim (DO NOT change the given wording). ========================================== New Question 26: What are the two main types of Load Balancers based on their implementation? Choice A: Hardware-based and cloud-based Choi...

Add the following multiple choice questions and answers and explanations verbatim (DO NOT change the given wording). ========================================== New Question 26: What are the two main types of Load Balancers based on their implementation? Choice A: Hardware-based and cloud-based Choice B: Software-based and cloud-based Choice C: Hardware-based and software-based Choice D: Virtual-based and physical-based Correct answer: C Explanation: Load Balancers can be categorized into hardware-based and software-based types. Hardware-based Load Balancers are physical devices, while software-based Load Balancers are implemented through software applications. ========================================== New Question 27: At which OSI layer does an application-level Load Balancer operate? Choice A: Layer 3 - Network layer Choice B: Layer 4 - Transport layer Choice C: Layer 5 - Session layer Choice D: Layer 7 - Application layer Correct answer: D Explanation: Application-level Load Balancers operate at Layer 7 of the OSI model, which is the Application layer. This allows them to make routing decisions based on application-level data such as HTTP headers and cookies. ========================================== New Question 28: Which of the following factors do Load Balancers consider when distributing incoming traffic? Choice A: User authentication status Choice B: Number of current connections Choice C: Data encryption levels Choice D: Client device type Correct answers: B Explanation: Load Balancers distribute incoming traffic based on factors like the number of current connections, server response times, and server health to optimize resource use and ensure reliability. ========================================== New Question 29: Which functionality is typically handled by an API Gateway as a cross-cutting concern? Choice A: Data storage management Choice B: Rate limiting Choice C: Physical server maintenance Choice D: Network packet routing Correct answer: B Explanation: Rate limiting is a cross-cutting concern managed by API Gateways. It controls the number of requests a client can make to the API in a given timeframe, helping to prevent abuse and ensure fair usage. ========================================== New Question 30: How does an API Gateway function as a reverse proxy in a microservices architecture? Choice A: By storing all API responses for quick retrieval Choice B: By directly connecting clients to backend services without processing Choice C: By receiving client requests and forwarding them to the appropriate backend services Choice D: By managing physical network connections between clients and servers Correct answer: C Explanation: An API Gateway acts as a reverse proxy by receiving client requests and forwarding them to the appropriate backend services. This abstraction simplifies client interactions and centralizes request handling. ========================================== New Question 31: In a microservices architecture, what role does an API Gateway play in simplifying client interactions? Choice A: It replaces the need for Load Balancers entirely Choice B: It provides a unified interface for clients to interact with multiple microservices Choice C: It manages the physical deployment of microservices Choice D: It handles only authentication and authorization tasks Correct answer: B Explanation: In a microservices architecture, an API Gateway provides a unified interface for clients to interact with multiple microservices. This simplifies client interactions by abstracting the complexity of the backend services. ========================================== New Question 32: What is rate limiting and which component typically handles it? Choice A: Controlling data storage usage, handled by Load Balancers Choice B: Restricting the number of API requests, handled by API Gateways Choice C: Managing server CPU usage, handled by Load Balancers Choice D: Limiting network bandwidth, handled by API Gateways Correct answer: B Explanation: Rate limiting restricts the number of API requests a client can make within a certain timeframe. This functionality is typically handled by API Gateways to prevent abuse and ensure fair usage of the API. ========================================== New Question 33: How do hardware-based Load Balancers differ from software-based Load Balancers? Choice A: Hardware-based are more flexible, while software-based are faster Choice B: Hardware-based are physical devices, while software-based are implemented through software applications Choice C: Hardware-based operate at Layer 7, while software-based operate at Layer 4 Choice D: There is no difference; they are two terms for the same thing Correct answer: B Explanation: Hardware-based Load Balancers are physical devices dedicated to balancing traffic, offering high performance and reliability. Software-based Load Balancers are implemented through software applications, providing flexibility and ease of deployment. ========================================== New Question 34: In the context of API Gateways, what is API composition? Choice A: Combining multiple API responses into a single response for the client Choice B: Creating new APIs based on existing ones Choice C: Organizing APIs into hierarchical structures Choice D: Encrypting API data for security Correct answer: A Explanation: API composition involves combining responses from multiple backend services into a single, consolidated response for the client. This is a key functionality of API Gateways that simplifies client-side processing. ========================================== New Question 35: What is the benefit of an API Gateway's ability to transform APIs? Choice A: It allows the API Gateway to change the protocol of incoming requests Choice B: It enables the API Gateway to modify request and response formats to ensure compatibility between clients and services Choice C: It lets the API Gateway encrypt all data passing through it Choice D: It provides a mechanism for the API Gateway to store API keys securely Correct answer: B Explanation: API transformation allows the API Gateway to modify the format of requests and responses, ensuring that clients and backend services can communicate effectively even if they use different data formats or protocols. ==========================================