Data Review

A videographer stores videos on his laptop. In this case the videos are considered the data. Each video includes metadata such as: -Date: The date the video was shot. -Time: The time the video was shot. -Location: The location the video was shot. -Device: The camera the video was recorded with. Which of the following could the videographer NOT do based on this metadata?

• Filter videos to those recorded within the city

• Filter videos to those recorded in the last 3 months

• Filter videos to those recorded in a particular city.

• Filter videos to those recorded with his favorite camera

Answer explanation

The metadata only stored the date, time, location, and device used for each video recording. Any other data outside of the metadata will not be able to be filtered.

This type of data makes working with other data easier - allowing the user to sort or locate specific information. It is also referred to as "data about data". What type of data is this?

• Quantitative Data

• Programming Data

• Metadata

• Machine Data

Answer explanation

The word "meta" means to refer to self or to the conventions of its genre. Hence, metadata is data about data.

A coffee shop is interested in learning about the beverage preferences of coffee drinkers living nearby to the coffee shop and intends to use survey data to help decide which new beverage options to add to the menu. Which of the following is LEAST likely to be part of the process used to analyze the data?

• Filtering data to view responses based off of gender.

• Cleaning data to remove inconsistencies.

• Filtering data to view responses based off of age.

• Cleaning up data visualization to remove unwanted patterns.

Answer explanation

We don't manipulate data to remove unwanted patterns. When we analyze data, we analyze what we have and not what we want to manipulate it to show. Cleaning data is a process that makes the data uniform without changing its meaning. To change unwanted patterns in the data will more than likely change the meaning of the data when analyzed.

An ornithologist is interested in learning more about the different kinds of birds living in different areas of the state he lives in. The ornithologist creates an app that allows residents of the town to photograph birds in their area using a smartphone and record date, time, and location of the photograph. Afterwards the ornithologist will analyze the data to try to determine where different kinds of birds living in the state.Which of the following does this situation best demonstrate?

• Crowd Sourcing

• Crowd funding

• Citizen Science

• Open Data

Answer explanation

Citizen Science can be defined as scientific research conducted in whole or part by distributed individuals, many of whom may not be scientists, who contribute relevant data to research using their own computing devices.

A local health department decides to publicize data it has collected about the spread of Covid-19 around the city. The data is freely available for all to use and analyze in the hopes that it is possible to identify more efficient strategies to avoid the spread of the virus.Which of the following does this situation best demonstrate?

• Open Data

• Citizen Science

• Crowd funding

• Machine Data

Answer explanation

Open data is research data that is freely available on the Internet for anyone to download, modify, and distribute without any legal or financial restrictions.

A videographer stores videos on his laptop. In this case the videos are considered the data. Each video includes metadata such as: -Date: The date the video was shot. -Time: The time the video was shot. -Location: The location the video was shot. -Device: The camera the video was recorded with. Filtering the data to analyze specific portions of the metadata would be considered what?

• Machine Data

• Data Filtering

• Crowd funding

• Crowd Sourcing

Answer explanation

Data filtering is choosing a smaller subset of a data set to use for analysis, for example by eliminating / keeping only certain rows in a table.

Data that showed Individuals who smoked 5 packs of cigarettes a week all developed lung cancer was an example of what?

• Machine Data

• Correlation

• Open Data

• Citizen Science

Answer explanation

Correlation is a relationship between two pieces of data, it refers to how one piece of data directly impacts another.

Providing users to read-only access to data is an example of

• Security

• Privacy

• Encryption

• Filtering

Answer explanation

Security is giving the appropriate level of access to data or software functionality.

Which data compression technique comes at the expense of losing data?

• Classification

• Filtering

• Lossless

• Lossy

Answer explanation

Lossy data compression involves the loss of some data in the compression process. The original data that is lost can never be restored, but this technique offers the greatest compression.

Information about the location of a photograph within the data of a picture is

• Content

• Open Data

• Metadata

• Maxdata

Answer explanation

The word "meta" means to refer to self or to the conventions of its genre. Hence, metadata is data about data