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IBM Interview Question Bank

IBM's recent technical screens are dominated by auto-triggered HackerRank online assessments for entry-level, intern, full-stack, backend, AI, and .NET roles. The question mix is mostly easy-to-medium data structures, sliding-window, interval, graph-connectivity, and small frontend/CSS tasks, while Red Hat / AI-infrastructure loops add live coding around inference kernels, Kubernetes controllers, and DevOps fundamentals.

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Maximum Concurrent Processes / Meeting Rooms

Given process or meeting intervals with inclusive endpoints, return the maximum number active at the same time. One version is a direct Meeting Rooms II-style prompt over `List<List<Integer>> meetingTimings`; another describes distributed-service process logs.

interval-aggregation

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OJ Problems

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Count strictly decreasing-by-1 subarrays of length at least 2 Count numbers of the form 3^x * 5^y within a range Reverse Last Two Characters with a Space Minimum Number of Meeting Rooms (Intervals as List<List<Integer>> )Get Minimum Increment Get Minimum Operations Minimum Hits Needed Maximum Increment to Make Array Ascending Find Length of Longest Bitonic Subarray Find Common Keys in Product Recommendations Optimize Streaming Platform Sessions Search Values in a Binary Search Tree Retrieve and Filter Elite Clubs from Football Teams API Group Words by Character Frequency Return the Last Lexicographical Substring Compare Products from Three Separate Lists Find the Largest Subset of a String Merge 2 Arrays Find Missing Integer Maximize Integer with Swap Find Non-Repeated Elements Get Final String Card Packets Get Query Answers Pth Factor Get Query Results Count Teams Visible Profiles Count Meandering Array Max XOR

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