New Interview Questions: October 2026
Questions added to the Dataford question bank in October 2026, ranked by how often they are asked in real interviews.
Place the fewest cameras in a binary tree so every node is monitored using a postorder DFS.
Siemens Digital Industries Software
SiemensImplement a Bike model with equality, hashing, comparable ordering, comparator ordering, and HashSet-style deduplication.
Walmart Global Tech
WalmartUse a min-heap and a greedy strategy to connect all ropes with minimum total cost.
QuinceCount contiguous subarrays with sum k using prefix sums and a hash map in O(n) time.
Jpmorgan Chase &Compare PostgreSQL functions and procedures by return values, DML capabilities, transaction control, and invocation method.
ExperianSplit each input string into one ordered row per character while excluding NULL and empty inputs.
Walmart LabsWalmartReturn each user's second most recent activity, or their only activity when no second record exists.
Walmart LabsWalmartFind every user with the highest query count in audit.txt using PostgreSQL aggregation and joins.
Walmart Global TechWalmart LabsSign up to see every question
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