Q1. How do you differentiate instruction for mixed-ability learners?
I differentiate in content, process and product, and I plan it before the lesson, not on the fly. First I know where students are, through a short diagnostic, prior work ...
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Q2. How does GraphQL differ from REST?
GraphQL exposes a single endpoint and a typed schema rather than many resource URLs. The client sends a query describing exactly the fields it needs, so it avoids the ove...
Q3. How would you design a URL shortener like bit.ly?
Requirements: shorten a long URL, redirect quickly, handle ~100M new links per day with a 100:1 read-to-write ratio. API: POST /api/links {longUrl} -> {shortUrl}; GET /{c...
Q4. How do you version a public REST API?
Common strategies: - URI path versioning: `https://api.example.com/v1/orders`. Most visible and easiest to route and cache, at the cost of polluting the URL. - Query para...
Q5. Explain the TDD red-green-refactor cycle.
Test-driven development is a short cycle that drives design from tests. 1. Red: write a failing test for the smallest next behaviour. It must fail, otherwise it proves no...
Q6. How does colour contrast work and what ratios are required?
WCAG contrast is measured as a ratio between the relative luminance of text and its background, ranging from 1:1 to 21:1. At level AA, normal text needs at least 4.5:1 an...
Q7. How would you redesign a course for online delivery?
I start from the learning outcomes and the constraints, not from the technology. First I map which outcomes can be achieved online and which need synchronous or practical...
Q8. Explain boundary value analysis and equivalence partitioning.
Most bugs hide at the edges of valid ranges, because off-by-one and comparison mistakes concentrate there. Boundary value analysis tests just inside, on and just outside ...
Q9. Design a shape hierarchy so new shapes can be added without changing existing code.
Depend on an abstraction and let each shape compute its own values. ```java interface Shape { double area(); double perimeter(); } class Circle implements Shape { private...
Q10. Which HTTP status codes should a REST API return?
Group them by intent and be consistent: - 2xx success: 200 OK, 201 Created (with `Location`), 202 Accepted for async work, 204 No Content after DELETE. - 3xx: 301/308 for...