CTO Digital Product Development 5

Question 1

A CTO is evaluating whether to implement a 'strangler fig' pattern. In what scenario is this pattern most applicable?

Accepted Answer

Incrementally replacing a legacy monolith by routing traffic to new services as they are built

Answer

The strangler fig pattern allows teams to gradually migrate a legacy system by building new functionality alongside it and incrementally redirecting traffic, avoiding a risky big-bang rewrite.

Question 2

What does 'shift-left testing' mean in a digital product development context?

Accepted Answer

Introducing testing activities earlier in the development lifecycle, closer to coding

Answer

Shift-left testing moves quality activities earlier in the SDLC—into design and development phases—so defects are caught when they are cheapest to fix.

Question 3

A product manager proposes an OKR where the Key Result is 'launch the mobile app by Q3.' Why is this a poorly formed Key Result?

Accepted Answer

It measures an output (activity) rather than an outcome (measurable impact)

Answer

Good Key Results measure outcomes and impact (e.g., 'achieve 10,000 MAU on mobile by Q3'), not activities or deliverables, which are better tracked in project plans.

Question 4

In the context of digital product security, what is 'threat modeling'?

Accepted Answer

A proactive process of identifying, enumerating, and mitigating potential security threats during design

Answer

Threat modeling (e.g., STRIDE) is performed during design to systematically identify attack surfaces and mitigations before code is written, reducing cost of remediation.

Question 5

A SaaS product reaches product-market fit when which condition is met?

Accepted Answer

A sufficiently large segment of users would be 'very disappointed' if the product disappeared, typically 40%+

Answer

Sean Ellis's benchmark for PMF is that at least 40% of surveyed users say they would be 'very disappointed' if they could no longer use the product.

(CTO) Certified Chief Technology Officer Practice Test

(CTO) Certified Chief Technology Officer Practice Test

CTO Digital Product Development 5