Quick Revision

GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

Looking for exam process/strategy questions instead? Try the Exam Preparation FAQ →

Computer Networks → Introduction to Computer Networks 40

What is load testing
Testing system under expected peak and beyond peak load
click to copy
What is stress testing
Testing beyond normal capacity to find breaking points
click to copy
What is soak testing
Extended duration testing to find memory leaks and slow degradation
click to copy
What is chaos monkey specifically doing
Randomly terminating production instances to test resilience
click to copy
GameDay in reliability engineering
Simulated failure exercise to practice incident response
click to copy
What is Kubernetes HPA based on
CPU memory or custom metrics for autoscaling
click to copy
Kubernetes resource requests are
Guaranteed minimum resources for scheduling
click to copy
Kubernetes resource limits are
Maximum resources a container can use
click to copy
Kubernetes QoS class Guaranteed requires
Both requests and limits set and equal
click to copy
Kubernetes QoS class BestEffort has
No requests or limits set
click to copy
Kubernetes namespace isolates
Resources and policies within a cluster logically
click to copy
Kubernetes RBAC controls
Who can perform which operations on which resources
click to copy
Kubernetes NetworkPolicy controls
Pod-to-pod network traffic flow
click to copy
Kubernetes PodSecurityPolicy (deprecated) controlled
What security contexts pods could use
click to copy
Kubernetes admission controller
Intercepts API requests to validate or mutate before persistence
click to copy
What is FinOps
Cloud financial management practices
click to copy
Cloud reserved instances provide
Significant cost savings for committed usage
click to copy
Cloud spot instances are
Discounted but interruptible compute capacity
click to copy
Cloud cost optimization includes
Right-sizing idle resource elimination and savings plans
click to copy
What is serverless computing
Running code without managing servers (event-driven FaaS)
click to copy
What is FaaS
Function as a Service
click to copy
AWS Lambda charges for
Execution time and number of requests
click to copy
Cold start in serverless is
Delay when function container initializes for first time
click to copy
What is event-driven architecture
System responding to events rather than polling
click to copy
What is pub-sub pattern
Publishers send messages to topics subscribers receive
click to copy
What is idempotency in APIs
Same request produces same result multiple times safely
click to copy
What is API versioning
Managing multiple API versions simultaneously
click to copy
What is API deprecation
Phasing out old API version with migration path
click to copy
What is API throttling backpressure
Slowing down producers when consumers cannot keep up
click to copy
What is circuit breaker open state
Failing fast without attempting calls to unavailable service
click to copy
What is circuit breaker half-open state
Allowing trial requests to test if service recovered
click to copy
What is bulkhead in microservices
Isolating resources per service to prevent cascade failures
click to copy
What is saga pattern
Managing distributed transactions with compensating transactions
click to copy
What is outbox pattern
Reliably publishing events using database transaction outbox table
click to copy
What is CQRS benefit
Separate read and write models optimized independently
click to copy
What is eventual consistency trade-off
Higher availability and partition tolerance at cost of immediate consistency
click to copy
What is two-phase commit (2PC)
Distributed protocol ensuring atomic transaction across multiple nodes
click to copy
2PC coordinator in first phase sends
Prepare message to all participants
click to copy
2PC coordinator in second phase sends
Commit or abort based on participant votes
click to copy
What is distributed lock
Coordinating exclusive access across distributed nodes
click to copy