Q1. How do you reduce Docker image size?
Attack the layers, base image, and build context. - Use a minimal base: alpine, distroless, or scratch for static binaries. - Use multi-stage builds: compile in one stage...
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Q2. Describe common compiler optimisations.
Optimisation improves the intermediate representation while preserving observable behaviour. Common examples: - Constant folding and propagation: compute `2 * 3` at compi...
Q3. Explain how gradient descent optimizes a model.
Gradient descent minimizes a loss function by repeatedly moving parameters in the direction that decreases the loss. The gradient is the vector of partial derivatives, an...
Q4. How would you analyse and optimise a slow query?
Query optimisation starts by measuring. `EXPLAIN` shows the plan; `EXPLAIN ANALYZE` runs it and reports actual rows and time. Things to look for: sequential scans on larg...