Engelhart interview questions

Showing 1–8 of 8 results

• Design a Daily Weather-Forecast Pipeline That Runs Power Models for Energy TradersMedium

  Design a pipeline that ingests a weather forecast CSV published daily at a variable time, validates and stores it, runs black-box demand, wind, solar, hydro and price models across every scenario, and serves aggregated forecasts to traders. It tests scheduling, DAG design, failure handling, dashboard delivery and scaling to thousands of scenarios.

  EngelhartSoftware EngineerSystem DesignTechnical Screen
• Exposing a Python Function as a REST Endpoint with FastAPI and Unit Testing ItMedium

  An interview question on exposing a Python function as a REST API endpoint and testing it. It asks whether FastAPI counts as an endpoint, how an endpoint maps an HTTP request onto a function, and how you unit test such code, with a concrete example that covers edge cases and replaced dependencies.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen
• Python Abstract Classes and Instance, Class and Static MethodsMedium

  A Python object-oriented programming interview question on abstract classes and method kinds. It asks what an abstract class is and whether it can be instantiated, how instance, class and static methods differ, what self and cls refer to, and why a static method would live inside a class at all.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen
• Python Dictionary Internals: Hashing, Collisions, O(1) Lookup and Hashable KeysMedium

  A Python fundamentals interview question on how dictionaries store and look up values: what gets hashed, whether different keys can share a hash, how collisions are resolved and why average lookup is constant time. It also tests whether a list can serve as a key and which objects are allowed as keys.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen
• Python Generators, yield, Lazy Evaluation and How Decorators WorkMedium

  A Python interview question on generators and decorators. It asks what a generator is, what yield does, why generators use less memory and what lazy evaluation means, then what a decorator actually does under the hood, testing precise language mechanics rather than memorized definitions.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen
• Python Virtual Environments, Conda and Poetry, and Everyday Linux CommandsMedium

  A developer tooling interview question on Python virtual environments, why projects need them and how Conda and Poetry fit in, followed by practical Linux experience: which system you work on and which Unix commands you rely on to run and debug jobs on a server.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen
• Relational Database Indexes: Read/Write Trade-offs and Tuning a Slow SQL QueryMedium

  A database fundamentals interview question on relational indexes: what an index is, why it speeds up queries, why not every column should be indexed and how indexes affect write performance. It then asks how you would troubleshoot and tune a complex SQL query that runs extremely slowly.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen
• Threads vs Processes, the Python GIL, Multiprocessing and Async I/OMedium

  A Python concurrency interview question covering how threads and processes differ, including their memory spaces, when to reach for multiprocessing, what the Global Interpreter Lock is and how it limits CPU-bound threads, and why async I/O is a good fit for network and other I/O-bound workloads.

  EngelhartSoftware EngineerSoftware Engineering FundamentalsTechnical Screen