Data Science Trivia 5

Question 1

Which file format is widely used for storing nested, hierarchical data in web APIs?

Accepted Answer

JSON

Answer

CSV

Answer

XLSX

Answer

TXT

Question 2

What is the term for filling in missing data values during preprocessing?

Accepted Answer

Imputation

Answer

Normalization

Answer

Encoding

Answer

Aggregation

Question 3

Which metric measures the proportion of correct predictions out of all predictions?

Accepted Answer

Accuracy

Answer

Recall

Answer

Precision

Answer

F1 score

Question 4

What scaling technique rescales features to a range between 0 and 1?

Accepted Answer

Min-max normalization

Answer

Standardization

Answer

Log transform

Answer

One-hot encoding

Question 5

Which type of join returns only rows with matching keys in both tables?

Accepted Answer

Inner join

Answer

Left join

Answer

Right join

Answer

Full outer join

Question 6

What is the iterative cloud or local environment combining code, output, and notes commonly used by data scientists?

Accepted Answer

Jupyter Notebook

Answer

Notepad

Answer

PowerPoint

Answer

Outlook

Question 7

Converting categorical variables into binary columns is known as what?

Accepted Answer

One-hot encoding

Answer

Label smoothing

Answer

Tokenizing

Answer

Binning