Machine Coding Sheet

PayPal Machine Coding Interview

Top low-level design (LLD) and machine coding questions frequently asked in PayPal interviews. Master these to clear the LLD round.

Overall progress

0/104 solved

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easy0/18

medium0/45

hard0/41

0/104

Solved

CategoryCompanyStatus

0/3 solved

Problem	Difficulty	Key Focus
Multi-Currency Wallet Asked by:StripePayPalWise+1 more	Medium	FX Rate Service, Rounding
Digital Wallet Asked by:PayPalBlockStripe+1 more	Hard	Command Pattern, Deadlock Prevention, Transaction Rollback, ACID
Digital Wallet (Advanced) Asked by:PayPalBlockStripe	Hard	Serialized Balance Updates

0/2 solved

Status	Star	Problem	Difficulty	Key Focus	Notes
		Price Comparison Engine Asked by:GoogleAmazonPayPal	Easy	Normalization, Entity Matching
		Discount Engine Asked by:AmazonWalmartPayPal	Medium	Stacking Policy, Atomic Usage

0/1 solved

Status	Star	Problem	Difficulty	Key Focus	Notes
		Fraud Detection Rules Engine Asked by:StripePayPalCoinbase+1 more	Hard	Predicate Logic, Thresholds