Public task directory

Technical interview practice tasks

Every entry below is a crawlable link to a unique public task page. This directory complements the interactive filters and keeps the complete catalog connected through standard pagination.

Page 97 of 386 · 18,491 tasks

Knowledge Check · Easy · 1 min

What is the main purpose of Window calculation in ds SQL analysis

What is the main purpose of Window calculation in ds SQL analysis?

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Knowledge Check · Easy · 1 min

What is the main purpose of Cohort join in ds SQL analysis

What is the main purpose of Cohort join in ds SQL analysis?

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Knowledge Check · Easy · 1 min

What is the main purpose of Null handling in ds SQL analysis

What is the main purpose of Null handling in ds SQL analysis?

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Knowledge Check · Hard · 1 min

While reviewing ds SQL analysis, revenue duplicates after joining line items. Which action fixes it, and which check proves it worked

While reviewing ds SQL analysis, revenue duplicates after joining line items. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds SQL analysis, each event needs user running spend. Which action fixes it, and which check proves it worked

While reviewing ds SQL analysis, each event needs user running spend. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds SQL analysis, retention changes cohort membership over time. Which action fixes it, and which check proves it worked

While reviewing ds SQL analysis, retention changes cohort membership over time. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds SQL analysis, an average silently excludes absent values. Which action fixes it, and which check proves it worked

While reviewing ds SQL analysis, an average silently excludes absent values. Which action fixes it, and which check proves it worked?

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Knowledge Check · Medium · 1 min

While reviewing ds SQL analysis, revenue duplicates after joining line items. Which action best addresses the problem

While reviewing ds SQL analysis, revenue duplicates after joining line items. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds SQL analysis, each event needs user running spend. Which action best addresses the problem

While reviewing ds SQL analysis, each event needs user running spend. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds SQL analysis, retention changes cohort membership over time. Which action best addresses the problem

While reviewing ds SQL analysis, retention changes cohort membership over time. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds SQL analysis, an average silently excludes absent values. Which action best addresses the problem

While reviewing ds SQL analysis, an average silently excludes absent values. Which action best addresses the problem?

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Knowledge Check · Easy · 1 min

What is the main purpose of Point estimate in ds statistical inference

What is the main purpose of Point estimate in ds statistical inference?

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Knowledge Check · Easy · 1 min

What is the main purpose of Confidence interval in ds statistical inference

What is the main purpose of Confidence interval in ds statistical inference?

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Knowledge Check · Easy · 1 min

What is the main purpose of Standard error in ds statistical inference

What is the main purpose of Standard error in ds statistical inference?

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Knowledge Check · Easy · 1 min

What is the main purpose of Bootstrap in ds statistical inference

What is the main purpose of Bootstrap in ds statistical inference?

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Knowledge Check · Hard · 1 min

While reviewing ds statistical inference, a survey estimates average satisfaction. Which action fixes it, and which check proves it worked

While reviewing ds statistical inference, a survey estimates average satisfaction. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds statistical inference, a conversion lift estimate is noisy. Which action fixes it, and which check proves it worked

While reviewing ds statistical inference, a conversion lift estimate is noisy. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds statistical inference, larger samples produce steadier means. Which action fixes it, and which check proves it worked

While reviewing ds statistical inference, larger samples produce steadier means. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds statistical inference, an analytic interval is difficult for a median. Which action fixes it, and which check proves it worked

While reviewing ds statistical inference, an analytic interval is difficult for a median. Which action fixes it, and which check proves it worked?

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Knowledge Check · Medium · 1 min

While reviewing ds statistical inference, a survey estimates average satisfaction. Which action best addresses the problem

While reviewing ds statistical inference, a survey estimates average satisfaction. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds statistical inference, a conversion lift estimate is noisy. Which action best addresses the problem

While reviewing ds statistical inference, a conversion lift estimate is noisy. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds statistical inference, larger samples produce steadier means. Which action best addresses the problem

While reviewing ds statistical inference, larger samples produce steadier means. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds statistical inference, an analytic interval is difficult for a median. Which action best addresses the problem

While reviewing ds statistical inference, an analytic interval is difficult for a median. Which action best addresses the problem?

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Knowledge Check · Easy · 1 min

What is the main purpose of Trend in ds time series

What is the main purpose of Trend in ds time series?

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Knowledge Check · Easy · 1 min

What is the main purpose of Seasonality in ds time series

What is the main purpose of Seasonality in ds time series?

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Knowledge Check · Easy · 1 min

What is the main purpose of Autocorrelation in ds time series

What is the main purpose of Autocorrelation in ds time series?

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Knowledge Check · Easy · 1 min

What is the main purpose of Backtest in ds time series

What is the main purpose of Backtest in ds time series?

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Knowledge Check · Hard · 1 min

While reviewing ds time series, weekly sales rise steadily over years. Which action fixes it, and which check proves it worked

While reviewing ds time series, weekly sales rise steadily over years. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds time series, traffic peaks every weekend. Which action fixes it, and which check proves it worked

While reviewing ds time series, traffic peaks every weekend. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds time series, forecast residuals follow yesterday errors. Which action fixes it, and which check proves it worked

While reviewing ds time series, forecast residuals follow yesterday errors. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds time series, one future split gives unstable evidence. Which action fixes it, and which check proves it worked

While reviewing ds time series, one future split gives unstable evidence. Which action fixes it, and which check proves it worked?

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Knowledge Check · Medium · 1 min

While reviewing ds time series, weekly sales rise steadily over years. Which action best addresses the problem

While reviewing ds time series, weekly sales rise steadily over years. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds time series, traffic peaks every weekend. Which action best addresses the problem

While reviewing ds time series, traffic peaks every weekend. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds time series, forecast residuals follow yesterday errors. Which action best addresses the problem

While reviewing ds time series, forecast residuals follow yesterday errors. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds time series, one future split gives unstable evidence. Which action best addresses the problem

While reviewing ds time series, one future split gives unstable evidence. Which action best addresses the problem?

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Knowledge Check · Easy · 1 min

What is the main purpose of Position encoding in ds visualization

What is the main purpose of Position encoding in ds visualization?

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Knowledge Check · Easy · 1 min

What is the main purpose of Color encoding in ds visualization

What is the main purpose of Color encoding in ds visualization?

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Knowledge Check · Easy · 1 min

What is the main purpose of Uncertainty display in ds visualization

What is the main purpose of Uncertainty display in ds visualization?

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Knowledge Check · Easy · 1 min

What is the main purpose of Scale choice in ds visualization

What is the main purpose of Scale choice in ds visualization?

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Knowledge Check · Hard · 1 min

While reviewing ds visualization, categories need accurate value comparison. Which action fixes it, and which check proves it worked

While reviewing ds visualization, categories need accurate value comparison. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds visualization, a chart uses indistinguishable red and green. Which action fixes it, and which check proves it worked

While reviewing ds visualization, a chart uses indistinguishable red and green. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds visualization, a lift chart shows only means. Which action fixes it, and which check proves it worked

While reviewing ds visualization, a lift chart shows only means. Which action fixes it, and which check proves it worked?

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Knowledge Check · Hard · 1 min

While reviewing ds visualization, a log scale hides its transformation. Which action fixes it, and which check proves it worked

While reviewing ds visualization, a log scale hides its transformation. Which action fixes it, and which check proves it worked?

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Knowledge Check · Medium · 1 min

While reviewing ds visualization, categories need accurate value comparison. Which action best addresses the problem

While reviewing ds visualization, categories need accurate value comparison. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds visualization, a chart uses indistinguishable red and green. Which action best addresses the problem

While reviewing ds visualization, a chart uses indistinguishable red and green. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds visualization, a lift chart shows only means. Which action best addresses the problem

While reviewing ds visualization, a lift chart shows only means. Which action best addresses the problem?

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Knowledge Check · Medium · 1 min

While reviewing ds visualization, a log scale hides its transformation. Which action best addresses the problem

While reviewing ds visualization, a log scale hides its transformation. Which action best addresses the problem?

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Knowledge Check · Easy · 1 min

What is the main purpose of Eligible population in devplatform adoption metrics

What is the main purpose of Eligible population in devplatform adoption metrics?

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