Technical

Question 1

scalability

Answer 1

horizontal scaling

micro services

sharded DBs

caching

load balancing

Question 2

Availability

Answer 2

Redundancy and Failover (DR)

decoupled modules

fault tolerance

Security practices

Monitoring, Alerting and Incident response *

Question 3

Incident Management

Answer 3

operational health

ticket handling

protocol for high severity incidents

Question 4

security

Answer 4

IP based filtering / ACLs
TLS / client certs
o auth / jwt

Question 5

latency

Answer 5

Network - CDN
Server / DB - Caching
Client - Pagination / Incremental loading / gzip
code / db optimizations
under-configured hardware, pods etc.

Question 6

Refactoring

Answer 6

Static Code Analysis
Micros services / modularization
Break up large and complex functions/methods
TDD / Test Automation

Question 7

sustainability / maintain ability

Answer 7

Horizontally scalable architecture

CI / CD with testing and securities scan automation

Monitoring, alerting and self healing

Modular applications

Broken down, simple functions

Question 8

trade offs

Answer 8

Caching - speed vs consistency

Glacier - cost vs speed

Distributed Database - Availability & Performance vs. Consistency