ATD Quiz

ELEKS quiz

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1 / 7

Pick one answer that describes slowly changing dimensions Type 2. (SCD2)

Only the Current data is kept. No history.

Nothing above.

Keep limited historical context (current+previous value) in the same row.

Full history of changes is made by closing the old record and inserting a new one.

2 / 7

What does the term “Medallion Architecture” mean?

It's a configuration pattern that assigns Bronze, Silver or Gold compute tiers based on performance.

It’s a storage optimization technique that uses three folders: Bronze, Silver, Gold to separate hot, warm and cold data.

Aligning data to business needs.

Data design pattern used in lakehouses to organize data into layers of refinement (Bronze, Silver, Gold).

3 / 7

What is the purpose of Global Interpreter Lock (GIL) in Python?

To avoid “race condition” situation

To make developer`s life harder

To make developer`s life easier

4 / 7

What happens when this code runs?


import asyncio


async def work(name):
    print(f"{name} start")
    await asyncio.sleep(1)
    print(f"{name} end")


async def main():
    await work("A")
    await work("B")


asyncio.run(main())

It runs sequentially; total runtime ≈ 2 seconds

The output order is unpredictable

It runs both tasks concurrently; total runtime ≈ 1 second

It raises a RuntimeError because asyncio.run() cannot be used with multiple awaits

5 / 7

Which of the following issues is the regularization aimed to solve?

Cross-validation

Underfitting

High bias

Overfitting

6 / 7

What does the term “AI winter” refer to?

The vanishing gradient problem in Deep Neural Network

Period in scientific research in 20th century

The apocalyptic scenario of the future where Artificial Superintelligence takes over humanity

7 / 7

What was the initial LeNet-5 neural network use case?

Handwritten zip code recognition

Housing price prediction

Summarization of legal documents

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The average score is 48%

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