Intro to DS

Data engineers use data visualization and data analysis skills on their day-to-day tasks.

In statistics, this measure represents the middle value in a dataset arranged in ascending or descending order.

In Probability Theory, an event can be seen as a subset of the Sample Space.

Which of the following is a method of data transformation?

3 products make up the full sales of a company, which chart could represent the portion of sales for each product?

A company wants to visualize the relation between the squared footage and price of houses, which chart should be used?

Since line charts are used to view changes overtime of numerical values, which type of data is represented in them?

A security company needs to set a database to store data from IoT sensors and cameras. Which type of DB would work?

Which of the following is NOT a characteristic of primary keys in a relational DB?

Which of the following is NOT a characteristic of a Relational DB?

After data collection and cleaning, you analyse the data to learn trends and patterns in it. What's this stage called?

An inner join is used to obtain all entries of both tables mentioned in the query.

A company is doing a survey on its employees to collect suggestions on a new process. What type of data is this?

A box plot is used to show the distribution of data as well as any outliers present within the data set.