CTO Digital Product Development 4

Question 1

A CTO is asked to define the product vision. What is the key characteristic that distinguishes a product vision from a product strategy?

Accepted Answer

Vision describes the aspirational future state; strategy describes how to get there

Answer

Product vision is an inspirational North Star describing why the product exists and the future it enables, while strategy is the plan of initiatives to move toward that vision.

Question 2

Which API architectural style uses queries defined by the client to fetch exactly the data it needs, avoiding over- or under-fetching?

Accepted Answer

GraphQL

Answer

GraphQL allows clients to specify precisely the fields they need in a single request, eliminating the over-fetching and under-fetching problems common in REST APIs.

Question 3

A product team wants to validate a new feature hypothesis before engineering investment. What is the MOST cost-effective validation method?

Accepted Answer

Creating a clickable prototype and conducting usability tests

Answer

A clickable prototype enables real user testing of the core interaction without any engineering cost, providing fast invalidation or confirmation of the hypothesis.

Question 4

In event-driven architecture, what role does an 'event broker' (e.g., Kafka) play in a digital product ecosystem?

Accepted Answer

It decouples producers and consumers by reliably routing and persisting event streams

Answer

An event broker acts as a durable message bus that allows services to publish events and other services to subscribe independently, enabling loose coupling and replay capabilities.

Question 5

A CTO is reviewing product KPIs and notices activation rate is high but 90-day retention is poor. What does this pattern most likely indicate?

Accepted Answer

Users find value initially but the product fails to deliver ongoing value or habit

Answer

High activation with low long-term retention signals an engagement gap—the product creates a good first impression but doesn't sustain the habit loop needed for retention.

(CTO) Certified Chief Technology Officer Practice Test

(CTO) Certified Chief Technology Officer Practice Test

CTO Digital Product Development 4