Transactions
17 practice items · needed by 3 roles
Easy 4Medium 3Hard 10
Practice questions
- Atomicity in a money transfereasy
- Isolation levels and dirty readsmedium
- Lost update on a wallet balancehard
- Saving to DB and publishing an eventhard
- Deadlocks between two transfershard
- Two doctors go off call at oncehard
- Moving credits between accountsmedium
- Write skew under snapshot isolationhard
- Payment call inside a transactionhard
- Durability in ACIDeasy
- Why a write-ahead log existseasy
- What ROLLBACK undoeseasy
- Non-repeatable readmedium
- Fixing a recurring deadlockhard
- Two doctors go off callhard
- Locks held by nobodyhard
- Faster commits with a durability costhard