Data-Driven Problem Solving MCQs

Topic-wise practice questions for Problem Solving & Analytical Skills. Test your knowledge, check solutions on demand, and pace your preparation.

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Q11medium

(Code-Logic / SQL) You are looking at a database of server errors. Which query logic would help you find the Root Cause of a sudden spike in errors?


SELECT error_type, COUNT(*)
FROM logs
WHERE timestamp > '2023-10-01'
GROUP BY error_type

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Q12medium

You are testing a new compression algorithm. It works 10x faster on "Text files" but 2x slower on "Image files." Your app mainly handles Images. What is the data-driven decision?

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Q13easy

In data analysis, "Correlation does not imply Causation" means:

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Q14medium

A developer notices that the "Average Page Load Time" is 2 seconds. However, 20% of users are complaining the site is "extremely slow." Which data- driven action should the developer take next?

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Q15medium

A project manager says: "Our app is great because it has 1 million total downloads." As a critical thinker, why might you consider this a "Vanity Metric"?

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Q16medium

You are deciding whether to upgrade your server's RAM or its CPU. You check the logs and see: CPU Usage: 20%, Memory Usage: 98%. What is the data- driven decision?

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Q17easy

What is "Exploratory Data Analysis" (EDA)?

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Q18medium

An e-commerce site wants to know if a "Blue Buy Button" or a "Green Buy Button" leads to more sales. They show Blue to 50% of users and Green to the other 50%. This is an example of:

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