Case Studies
Practice real-world case studies for CAT, interviews, and professional growth. Submit solutions and get evaluated by industry experts.
Choosing a Caching Strategy for a Read-Heavy API
ReadFast API has a 50:1 read-to-write ratio and rising latency complaints. The manager must whiteboa...
Debugging a Silent Data Pipeline Failure
A nightly ETL job at DataForge is producing silently wrong output — no crash, just bad numbers downs...
Designing a Fair On-Call Rotation
PlatformOps has 6 engineers with uneven availability and a fairness requirement. The manager must de...
Cloud Cost Runaway Diagnosis
CloudFin Corp's AWS bill jumped sharply in one month. The manager must trace the cause across servic...
On-Call Ticket Volume Forecasting
SupportDesk Inc.'s manager must forecast next month's ticket volume from sparse, noisy historical da...
Capacity Planning for a Black Friday Traffic Spike
NimbusRetail's checkout service handles roughly 2,000 requests/second on a normal day. Based on last...
Making Consolidated Financial Reporting Engine
Making Consolidated Financial Reporting Engine by Using VSTACK, HSTACK MultiNational Corp "UniG...
Automated Batch Processing System
Making Automated Batch Processing System By Using : BYROW, BYCOL, SEQUENCE
Matrix Transformation & Data Restructuring Tool
Learn to use : ROW, COLUMN, TOROW, TOCOL
Multi-Criteria Project Filter Dashboard
Global Project Management Inc. needs an interactive dashboard to filter active projects by multiple ...
Dynamic Sales Commission Calculator
Ecologic , Baddi pays variable commissions based on tiered performance. Create a dynamic commissi...
Employee Attendance Register
A small company tracks attendance for 10 employees across one month. Taught live by Puneet Arora, th...
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