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Batch-01_BSc_Semester-01_Basics Of Data Analytics

Batch-01_BSc_Semester-01_Basics Of Data Analytics

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Creating a feature for “Adult” from an individual’s date of birth is an example of feature engineering.

True

False

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Descriptive Analytics involves answering questions such as “What should be done?”

True

False

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Formatting the data to correct data types is done before combining datasets.

True

False

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Sorting the data can help you calculate the range of the data.

True

False

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Why do we change units of measurement during transformation?

Anonymize data

Reduce file size

Eliminate skewness

Make variables comparable

100%

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Which programming languages are widely used for data cleaning?

JavaScript and HTML

Python and R

100%

Java and C++

PHP and Ruby

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What is a foreign key?

Random values key

Encrypting key

References a primary key in another table

100%

Last record identifier

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All customers who used the vouchers in March 2025

Outer Join of Table B and Table D, and the Outer Join with Table A

Outer Join of Table B and Table D, and the Left Join with Table A

100%

Left Join of Table D and Table B and then Outer Join with Table A

Inner Join of Table B and Table D, and then Inner Join with Table A

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All customers who used the vouchers in March 2025 and unused vouchers.

Outer Join of Table A and Table B and then Right Join with Table D

100%

Left Join of Table B and Table D, and then Inner Join with Table A

Inner join of Table B and Table D, and then Inner Join with Table C

Inner Join of Table B and Table D, and then Inner Join with Table A

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All orders placed in March 2025 using vouchers and unused vouchers.

Left Join of Table B and Table D

Inner Join of Table B and Table D, and then Inner Join with Table A

Left Join of Table D and Table B

100%

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