Opensource vs frontier

Prompt

1. A train leaves city A at 60 km/h. 30 minutes later, a second train leaves the same city on the same track at 90 km/h. How far from city A does the second train catch the first? Show your steps. 2. Alice is taller than Bob. Bob is taller than Carol. Dave is shorter than Carol but taller than Eve. Who is the second tallest, and who is the shortest? 3. Write a Python function that takes a list of integers and returns the length of the longest strictly increasing subsequence. Then explain its time complexity. 4. Explain why the sky is blue but sunsets are red, and name the physical phenomenon behind it. 5. A bat and a ball cost $1.10 together. The bat costs $1.00 more than the ball. How much does the ball cost? 6. What were the main causes of World War I, and how did the alliance system turn a regional conflict into a world war? 7. Write exactly three sentences about the ocean. The first must start with "W", the second must contain the word "silent", and the third must end with a question mark. 8. What is the difference between a Kubernetes Deployment and a StatefulSet? Give one real use case for each. 9. Explain how blockchain works to a 10-year-old in under 80 words, without using the words "cryptography" or "ledger". 10. Who won the Nobel Prize in Physics in 1995, and what was the discovery? If you're not sure, say so.