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A Four-Level In-Memory Database Assessment

TradedeskSoftware Engineer · Online Assessment · Aug 2026

It was no longer the recipe problem, but there were still four levels, and the general idea and direction had not changed much. Level 1: Given a key, field, and value, write the value into the database and implement insert, delete, and update operations. This can be done with one nested map or two maps. Level 2: There were two search operations. The first search uses the key and field to list all…

Shared by a candidate · reported Aug 2026. Interview formats change; use it as a guide, not a script.