Q1. In how many ways can the letters of the word "LEVEL" be arranged?
The word LEVEL has 5 letters with repeats: L appears 2 times, E appears 2 times, V appears once. Total arrangements = 5! / (2! x 2!) = 120 / 4 = 30. Approach: start with ...
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Q2. How do you narrow a union type?
Narrowing reduces a union to a subset within a control-flow branch. Techniques: - typeof for primitives. - instanceof for classes. - The in operator for property presence...
Q3. How should you paginate a GraphQL list field?
Two options: - Offset/limit: `orders(offset: 40, limit: 20)`. Easy to implement but unstable when items are inserted or removed and slow at large offsets. - Cursor-based ...
Q4. How would you design pagination for a large collection?
Two main approaches: - Offset pagination: `GET /items?limit=20&offset=40`. Simple and allows jumping to a page, but degrades as offsets grow because the database must sca...
Q5. How do you say no to a customer request you cannot fulfil?
I say no to the request, not to the customer. First I make sure I understand what they actually need, because a request is often a proposed solution rather than the real ...
Q6. How would you scale Scrum across multiple teams?
Scaling Scrum is a problem of coordination, not of adding more Scrum. The first question is whether scaling is needed, because more layers often slow delivery. I keep tea...
Q7. What is NAT and what problems does it cause?
Network Address Translation rewrites IP addresses and often ports as packets cross between a private network and the public Internet. It exists mainly because IPv4 addres...