Top 50 java Interview Questions
The most frequently asked java questions across all roles and companies, ranked by real interview frequency. Updated daily.
Use a hash table to count character frequencies and return duplicate characters in first-appearance order.
PlayStation
St. Charles Trading
ChubbExplain what a static variable is and how it behaves across function calls.
General Dynamics Mission SystemsImplement iterative binary search to find a target value in a sorted array using O(log n) time and O(1) space.
T. Rowe Price
GRIN
PhonepeDetermine whether an integer reads identically forward and backward using digit arithmetic and constant extra space.
Broadcom
Brillio
Deutsche BankDetermine whether an integer is prime using square-root bounds and parity-based optimization.
Principal Financial Group
TavantReverse each word independently while preserving whitespace characters, runs, positions, and word order.
TripadvisorImplement a stack adapter using one queue interface while preserving LIFO behavior and constant auxiliary space.
Jane StreetUse inheritance and method overriding to calculate total areas through a common Shape interface.
SiemensSign up to see every question
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