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Data Sampling and Stream Queries Quiz

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Questions and Answers

What is the purpose of data sampling in statistical analysis?

To exclude data points and focus only on outliers

To manipulate the data points and create a larger data set

To select a representative subset of data points and identify patterns and trends (correct)

To select all data points and analyze them comprehensively

What distinguishes standing queries from ad-hoc queries in the context of stream queries?

Ad-hoc queries are more complex and require real-time processing

Standing queries are only asked once about streams

Ad-hoc queries are designed to report maximum values in a stream

Standing queries are permanently executing and produce outputs at appropriate times (correct)

What type of query aims to estimate the average or standard deviation of the last k elements in a data stream?

Selecting elements with a specific property from the stream

Estimating moments (correct)

Counting distinct elements

Filtering a data stream

What does filtering a data stream involve?

Selecting elements with a specific property from the stream Signup and view all the answers

What is the primary purpose of counting distinct elements in the last k elements of a data stream?

To determine the number of distinct elements in the last k elements of the stream Signup and view all the answers

What is the primary purpose of estimating moments in a data stream?

To estimate the average or standard deviation of the last k elements Signup and view all the answers

What distinguishes standing queries from ad-hoc queries in the context of stream queries?

Standing queries are permanently executing and produce outputs at appropriate times Signup and view all the answers

What does filtering a data stream involve?

Selecting elements with a specific property from the stream Signup and view all the answers

What type of query aims to count the number of distinct elements in the last k elements of a data stream?

Counting distinct elements Signup and view all the answers

What is the purpose of data sampling in statistical analysis?

To select, manipulate, and analyze a representative subset of data points Signup and view all the answers

Data Sampling and Stream Queries Quiz

Choose a study mode

Podcast

Questions and Answers

What is the purpose of data sampling in statistical analysis?

What distinguishes standing queries from ad-hoc queries in the context of stream queries?

What type of query aims to estimate the average or standard deviation of the last k elements in a data stream?

What does filtering a data stream involve?

What is the primary purpose of counting distinct elements in the last k elements of a data stream?

What is the primary purpose of estimating moments in a data stream?

What distinguishes standing queries from ad-hoc queries in the context of stream queries?

What does filtering a data stream involve?

What type of query aims to count the number of distinct elements in the last k elements of a data stream?

What is the purpose of data sampling in statistical analysis?

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