CPA System Architecture & Design 3

Question 1

What is the purpose of an API Gateway in a microservices system?

Accepted Answer

To serve as a single entry point that routes requests to appropriate services

Answer

An API Gateway acts as a single entry point for clients, handling request routing, authentication, rate limiting, and load balancing across microservices.

Question 2

Which of the following best describes 'loose coupling' in software architecture?

Accepted Answer

Components depend minimally on each other's internal details

Answer

Loose coupling means components interact through well-defined interfaces, minimizing dependencies so changes in one component don't cascade to others.

Question 3

What is 'eventual consistency' in distributed system design?

Accepted Answer

Given enough time without updates, all nodes will converge to the same value

Answer

Eventual consistency guarantees that, in the absence of new updates, all replicas will eventually converge to the same value, accepting temporary inconsistency for availability.

Question 4

In the context of system design, what does 'scalability' refer to?

Accepted Answer

The ability of a system to handle increased load by adding resources

Answer

Scalability is the system's ability to handle growing amounts of work or users by adding hardware or software resources, either horizontally or vertically.

Question 5

What is horizontal scaling?

Accepted Answer

Adding more machines to distribute the load

Answer

Horizontal scaling (scaling out) adds more servers to distribute the workload, whereas vertical scaling (scaling up) increases the power of existing servers.

(CPA) Certified Associate Programmer Practice Test

(CPA) Certified Associate Programmer Practice Test

CPA System Architecture & Design 3