Drawing Insights from Data
A music streaming service stores information about the songs streamed its users. Every time a song is streamed, the following information is stored in a database: The title of the song The artist of the song The date and time that the song is streamed The city in which the song is being streamed Which of the following CANNOT be determined using only the information in the database?
A particular user's top played song of all time
Computers are often used to search through large sets of data to find useful patterns in the data. Which of the following tasks is an example where searching for patterns is needed to produce useful information?
An online retail store analyzing customers' viewing habits to suggest other products based on the purchasing history of other customers
A blogging Website allows users to post messages and to comment on other messages that have been posted. When a user posts a message, the message itself is considered data. In addition to the data, the site stores the following metadata. The time the message was posted The name of the user who posted the message The names of any users who comment on the message and the times the comments were made For which of the following goals would it be more useful to analyze the metadata instead of the data?
Determine the time of day that the site is most active
Biologists are researching the migration patterns of birds. They have attached tracking collars to several wild birds. For each bird, the following geolocation data is collected at frequent intervals. The time The date The location of the bird Which of the following questions about a particular bird could NOT be answered using only the data collected from the tracking collars?
Does the bird's diet change over the course of a year?
A large data set contains information about all students in colleges across the United States. The data set contains the following information about each student. The student's gender The state in which the student attends college The student's grade point average on a 4.0 scale The student's major Which of the following questions could be answered by analyzing only information in the data set?
How many states have computer science as the most common major for female students?
When a cellular telephone sends a text message, the cell carrier encodes the text message and transmits the message to the receiving cellular telephone. The encoded text message is the data of the transmission. In addition to transmitting the data, the cell carrier company also stores metadata. The metadata of the text message includes the time the message was sent, the phone number of the sender, and the phone number of the receiver. For which of the following goals would it be more useful to computationally analyze the metadata instead of the data? I. Estimate the number of texts that will be sent next month II. Determine the most frequently used emoji in text messages III. Determine if two phones have been in contact in the last week
I and III
A blogging Website allows users to post messages and to comment on other messages that have been posted. When a user posts a message, the message itself is considered data. In addition to the data, the site stores the following metadata. The time the message was posted The name of the user who posted the message The names of any users who comment on the message and the times the comments were made Which of the following questions could NOT be answered using only the data and metadata collected?
In what country is the site most active?
Biologists are researching the migration patterns of birds. They have attached tracking collars to several wild birds. For each bird, the following geolocation data is collected at frequent intervals. The time The date The location of the bird Which of the following questions about the group of tracked birds COULD be answered using only the data collected from the tracking collars?
In what month do the birds tend to travel the farthest?
A music streaming service stores information about the songs streamed its users. Every time a song is streamed, the following information is stored in a database: The title of the song The artist of the song The date and time that the song is streamed Which of the following CANNOT be determined using only the information in the database?
The most popular artist in a given city
A music streaming service stores information about the songs streamed its users. Every time a song is streamed, the following information is stored in a database: The title of the song The artist of the song The date and time that the song is streamed The name of the user streaming the song Which of the following CANNOT be determined using only the information in the database?
The most popular genre played by a particular user
A search engine has a trend-tracking feature that provides information on how popular a search term is. The data can be filtered by geographic region, date, and search term. Which of the following questions is LEAST likely to be answerable using the trends feature?
What region of the country has the highest population of a particular animal?
An online retailer that sells clothing maintains a database containing the following information about each item in the retailer's inventory: Item identification number Clothing type (shirt, shoes, pants, etc) Price (in dollars) Size Color Quantity available Using only the database, which of the following CANNOT be determined?
Which item has been purchased the most
An online retailer that sells clothing maintains a database containing the following information about each item in the retailer's inventory: Item identification number Clothing type (shirt, shoes, pants, etc) Price (in dollars) Size Color Quantity available Using only the database, which of the following can be determined?
Which item in the database is the most expensive
A chat Website allows users to post messages to the site. When a user posts a message, the message itself is considered data. In addition to the data, the site stores the following metadata. The time the message was posted The city from which the message was posted Which of the following questions can NOT be answered using only the data and metadata collected?
Which users post messages most frequently?
