Connect with fellow learners in the PlacePrep Discord communityㆍ Join now →

R's PlacePrep

Popular drives

TCSNQT (National Qualifier Test)InfosysIRT (InfyTQ Recruitment Test)AccentureCognitive & Technical Assessment

Also hiring

WiproNLTH (National Level Talent Hunt)CognizantGenC Assessment CapgeminiGame-Based Assessment

Browse all 14 companies TCS NQT 2026

Real placement papers from the drives you are actually sitting for

14 companies · 48 papersStart practising

Select your branch

Computer Science & EngineeringBEU previous year papers and solutions Mechanical EngineeringBEU previous year papers and solutions Electrical & Electronics EngineeringBEU previous year papers and solutions

More branches

Civil EngineeringBEU previous year papers and solutions Aeronautical EngineeringBEU previous year papers and solutions

All branches Computer Science

Previous year questions

University papers, sorted by subject and year with worked solutions

BEU Solved PapersOpen the archive

Core CS

Data Structures & AlgorithmsComplexity analysis up to graphs and DP.Operating SystemsProcesses, scheduling, memory and concurrency.Database Management SystemsRelational modelling, transactions and indexing.Computer NetworksFrom wires and radio waves up to the web.

Learn & scale

AI Inference EngineeringQuantization, batching and KV caching in production.System DesignScalable systems from first principles.Context EngineeringDesigning the context that LLMs actually reason over.Docker & KubernetesContainers and orchestration, explained.

All 15 courses Authors

Structured courses that start at zero and end somewhere useful

15 courses · free foreverBrowse courses

Companies PYQ Learn

Local to Production: Scaling Systems

The Database Problem4

Scaling the App Layer4

Caching for Speed4

Async Work & Scheduling4

Why not everything belongs in the request
Message queues and background workers
Scheduled jobs and cron
Putting the async pieces together

Putting It All Together4

Lessons

Contribute, invite only

Local to Production: Scaling Systems

The Database Problem4

Scaling the App Layer4

Caching for Speed4

Async Work & Scheduling4

Why not everything belongs in the request
Message queues and background workers
Scheduled jobs and cron
Putting the async pieces together

Putting It All Together4

Learn Local to Production: Scaling Systems Async Work & Scheduling

Contribute, invite only

Why not everything belongs in the request

The difference between work a user needs an answer to right now and work that can happen after the response is already sent.

9 min readUpdated 2026-09-04asyncqueuesscaling