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In two parts: first, implement a simple Bank class supporting deposit, withdraw, and transfer operations with account validation. Then, extend the class to track account activity and efficiently identify the most active accounts (e.g., by transaction count or total volume).
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Capital One
Extend a Simple Bank System to Track the Most Active Accounts
Reported Sep 1, 2026 · 3 source reports
SENIOR
Source snapshot: Nov 12, 2026
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