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Practice Zone • Java
10 Topics 15 Questions All Difficulty
Topics
All Questions Full list for Java 151 Arrays Practice Arrays with real questions. 15 Collections Practice Collections with real questions. 17 Control Flow Practice Control Flow with real questions. 15 Data Types Practice Data Types with real questions. 15 Exceptions Practice Exceptions with real questions. 15 Java Arrays Practice Java Arrays with real questions. 15 Methods Practice Methods with real questions. 14 OOP Basics Practice OOP Basics with real questions. 15 Operators Practice Operators with real questions. 15 Variables Practice Variables with real questions. 15
Questions
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Bitwise AND of two numbers
Easy
Jan 23, 2026
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Check odd using bit operator
Easy
Jan 23, 2026
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Swap using XOR
Easy
Jan 23, 2026
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Set k-th bit
Easy
Jan 23, 2026
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Clear k-th bit
Easy
Jan 23, 2026
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Toggle k-th bit
Medium
Jan 23, 2026
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Extract lowest set bit
Medium
Jan 23, 2026
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Count bits using Kernighan
Medium
Jan 23, 2026
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Check if kth bit is set
Medium
Jan 23, 2026
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Build mask between l..r
Medium
Jan 23, 2026
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Reverse bits in 32-bit int
Hard
Jan 23, 2026
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Find single number (others twice)
Hard
Jan 23, 2026
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Find two single numbers
Hard
Jan 23, 2026
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Subset check using bitmask
Hard
Jan 23, 2026
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Compute parity bit
Hard
Jan 23, 2026
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