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Practice Zone • Programming Interview
6 Topics 240 Questions All Difficulty
Topics
All Questions Full list for Programming Interview 240 Algorithms Practice Algorithms with real questions. 40 Data Structures Practice Data Structures with real questions. 40 DBMS Practice DBMS with real questions. 40 Networking Practice Networking with real questions. 40 OOP Practice OOP with real questions. 40 System Design Practice System Design with real questions. 40
Questions
Open List
Bank Balance
Easy
Jan 24, 2026
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Simple Counter
Easy
Jan 24, 2026
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Student Average
Easy
Jan 24, 2026
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Point Distance
Easy
Jan 24, 2026
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Book Thick Check
Easy
Jan 24, 2026
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Temperature Convert Class
Easy
Jan 24, 2026
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Car Fuel Check
Easy
Jan 24, 2026
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Stack Class
Easy
Jan 24, 2026
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Inventory Total Cost
Medium
Jan 24, 2026
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Sort Circles By Area (OOP)
Medium
Jan 24, 2026
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Time Add Seconds
Medium
Jan 24, 2026
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Employee Yearly Salary
Medium
Jan 24, 2026
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Fraction Add
Medium
Jan 24, 2026
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Matrix Sum
Medium
Jan 24, 2026
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Task Tracker
Medium
Jan 24, 2026
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Group Scores
Medium
Jan 24, 2026
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Shopping Cart
Medium
Jan 24, 2026
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Queue With Two Stacks
Medium
Jan 24, 2026
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URL Parts
Medium
Jan 24, 2026
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Password Rules
Medium
Jan 24, 2026
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Polynomial Evaluate
Medium
Jan 24, 2026
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Min Stack Class
Hard
Jan 24, 2026
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LRU Cache Class
Hard
Jan 24, 2026
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Graph Shortest Path Class (OOP)
Hard
Jan 24, 2026
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Calendar Conflicts
Hard
Jan 24, 2026
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Nested Store Class
Hard
Jan 24, 2026
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Sparse Vector Dot Product
Hard
Jan 24, 2026
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Complex Numbers Sum and Product
Medium
Jan 24, 2026
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Email Normalizer
Medium
Jan 24, 2026
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Connectivity Queries (DSU) (OOP)
Hard
Jan 24, 2026
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Trie Prefix Counter (OOP)
Hard
Jan 24, 2026
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Median Finder Class (OOP)
Hard
Jan 24, 2026
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Segment Tree Range Minimum (OOP)
Hard
Jan 24, 2026
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Classroom Register (Student CRUD)
Medium
Jan 24, 2026
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Bank Account Ledger
Medium
Jan 24, 2026
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Shape Area Total
Easy
Jan 24, 2026
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LRU Cache Simulator
Hard
Jan 24, 2026
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Event Subscriptions (Topic Bus)
Hard
Jan 24, 2026
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Top Customers by Spend
Easy
Jan 24, 2026
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Employees Without Manager
Easy
Jan 24, 2026
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Second Highest Salary
Easy
Jan 24, 2026
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Daily Active Users
Easy
Jan 24, 2026
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Orders With Missing Customers
Medium
Jan 24, 2026
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Products Never Sold
Medium
Jan 24, 2026
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Nth Highest Salary (Parameter N)
Hard
Jan 24, 2026
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Users With 3 Consecutive Logins
Hard
Jan 24, 2026
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Window Function Practice #9
Hard
Jan 24, 2026
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Join Practice #10
Easy
Jan 24, 2026
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Aggregation Practice #11
Medium
Jan 24, 2026
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Window Function Practice #12
Hard
Jan 24, 2026
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Join Practice #13
Easy
Jan 24, 2026
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Aggregation Practice #14
Medium
Jan 24, 2026
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Window Function Practice #15
Hard
Jan 24, 2026
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Join Practice #16
Easy
Jan 24, 2026
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Aggregation Practice #17
Medium
Jan 24, 2026
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Window Function Practice #18
Hard
Jan 24, 2026
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Join Practice #19
Easy
Jan 24, 2026
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Aggregation Practice #20
Medium
Jan 24, 2026
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Window Function Practice #21
Hard
Jan 24, 2026
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Join Practice #22
Easy
Jan 24, 2026
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Aggregation Practice #23
Medium
Jan 24, 2026
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Window Function Practice #24
Hard
Jan 24, 2026
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Join Practice #25
Easy
Jan 24, 2026
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Aggregation Practice #26
Medium
Jan 24, 2026
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Window Function Practice #27
Hard
Jan 24, 2026
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Join Practice #28
Easy
Jan 24, 2026
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Aggregation Practice #29
Medium
Jan 24, 2026
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Window Function Practice #30
Hard
Jan 24, 2026
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Join Practice #31
Easy
Jan 24, 2026
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Aggregation Practice #32
Medium
Jan 24, 2026
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Window Function Practice #33
Hard
Jan 24, 2026
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Join Practice #34
Easy
Jan 24, 2026
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Aggregation Practice #35
Medium
Jan 24, 2026
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Window Function Practice #36
Hard
Jan 24, 2026
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Join Practice #37
Easy
Jan 24, 2026
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Aggregation Practice #38
Medium
Jan 24, 2026
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Window Function Practice #39
Hard
Jan 24, 2026
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Join Practice #40
Easy
Jan 24, 2026
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TCP vs UDP (When to Use What)
Easy
Jan 24, 2026
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What Happens in a TLS Handshake?
Medium
Jan 24, 2026
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Why NAT Exists
Easy
Jan 24, 2026
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Three-Way Handshake #4
Easy
Jan 24, 2026
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Slow Start vs Congestion Avoidance #5
Medium
Jan 24, 2026
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Load Balancer Health Checks #6
Medium
Jan 24, 2026
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Idempotent HTTP Methods #7
Medium
Jan 24, 2026
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CDN Edge Caching #8
Medium
Jan 24, 2026
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WebSocket vs HTTP #9
Medium
Jan 24, 2026
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Packet Loss Symptoms #10
Hard
Jan 24, 2026
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What is DNS Caching? #11
Easy
Jan 24, 2026
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HTTP Keep-Alive #12
Easy
Jan 24, 2026
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CIDR Basics #13
Easy
Jan 24, 2026
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Three-Way Handshake #14
Easy
Jan 24, 2026
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Slow Start vs Congestion Avoidance #15
Medium
Jan 24, 2026
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Load Balancer Health Checks #16
Medium
Jan 24, 2026
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Idempotent HTTP Methods #17
Medium
Jan 24, 2026
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CDN Edge Caching #18
Medium
Jan 24, 2026
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WebSocket vs HTTP #19
Medium
Jan 24, 2026
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Packet Loss Symptoms #20
Hard
Jan 24, 2026
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What is DNS Caching? #21
Easy
Jan 24, 2026
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HTTP Keep-Alive #22
Easy
Jan 24, 2026
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