Deutsche Telekom Software Engineer Interview Questions
The questions to prepare for a Deutsche Telekom Software Engineer interview. Questions from real interview reports rank first. Updated daily.
Find two indices in an array whose values add up to a target using a hash map.
Tests your ability to implement and reason about dynamic programming solutions.
Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.
Tests understanding of database locking mechanisms and concurrency control.
Rewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.
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EnergyHubUse joins, conditional aggregation, and ROW_NUMBER to find the three highest-churn Deutsche Telekom products in each region.
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Assesses understanding of session strategy, security, and consistency across services.
Tests ability to design and justify software architecture decisions for a real project.
Assesses security fundamentals and practical selection of API authentication methods.
Evaluates baseline knowledge across .NET and Angular plus core JavaScript concepts.