Unit 2 Chapter 2

The AP CS Principles framework contains the following statement:

7.1.1G Search trends are predictors.

Which of the following is the most accurate statement about using search trends as predictors of future events?

• Search trends are imperfect predictors of future events that fully represent society at large

• Search trends are accurate and reliable predictors of future events that fully represent society at large.

• Search trends are imperfect predictors of future events that may not fully represent society at large.

• Search trends are accurate and reliable predictors of future events that may not fully represent society at large.

Biologists often attach tracking collars to wild animals. For each animal, the following geolocation data is collected at frequent intervals.

The time The date The location of the animal

Which of the following questions about a particular animal could NOT be answered using only the data collected from the tracking collars?

• Approximately how many miles did the animal travel in one week?

• Does the animal travel in groups with other tracked animals?

• Do the movement patterns of the animal vary according to the weather?

• In what geographic locations does the animal typically travel?

Computers are often used to search through large sets of data to find useful patterns in the data. Which of the following tasks is NOT an example where searching for patterns is needed to produce useful information?

• A credit card company analyzing credit card purchases to identify potential fraudulent charges

• A grocery store is analyzing customers' past purchases to suggest new products the customer may be interested in

• A high school analyzing student grades to identify the students with the top ten highest grade point averages

• An online retailer analyzing customers' viewing habits to suggest other products based on the purchasing history of other customers

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 category. Categories include arts and entertainment, computers and electronics, games, news, people and society, shopping, sports, and travel. Which of the following questions is LEAST likely to be answerable using the trends feature?

• In what month does a particular sport receive the most searches?

• In which political candidates are people interested?

• What is the cost of a certain electronics product?

• Which region of the country has the greatest number of people searching for opera performances?

When a cellular telephone user places a call, the carrier transmits the caller's voice as well as the voice of the person who is called. The encoded voices are the data of the call. In addition to transmitting the data, the carrier also stores metadata. The metadata of the call include information such as the time the call is places and the phone numbers of both participants. For which of the following goals would it be more useful to computationally analyze the metadata instead of the data?

I. To determine if a caller frequently uses a specific word

II. To estimate the number of phone calls places next Monday between 10:30 AM and noon

III. To generate a list of criminal suspects when given the telephone number of a known criminal

• I only

• II only

• II and III only

• I, II, and III

Consider the following numbers given in binary (BIN), decimal (DEC), and hexadecimal representations:

BIN: 1110

DEC: 13

HEX: F

Which of the following lists the numbers in order from least to greatest?

• BIN: 1110, DEC: 13, HEX: F

• DEC: 13, BIN: 1110, HEX: F

• DEC: 13, HEX: F, BIN: 1110

• HEX: F, DEC: 13, BIN: 1110

The chart below from Google Trends shows the prevalence of some search terms in the United States between 2004 and present. Which of the following is the most accurate statement of what this chart is showing?

• Since sometime around 2009, red has become the favorite color of more people

• Generally speaking, since 2009 more people use "red" in their search terms more than they use "blue", "yellow", "green", or "purple"

• The general decline in the search term "yellow" might be due to the decline in searches for yellow taxis, as car sharing services like Uber have become more popular

• Generally speaking, the volume of internet searches is increasing over time because the number of people using the internet is also increasing.

A bakery collects data on sales. Each sales record includes the date of the sale and some metadata about the items that were part of the sale. The data includes: the names of the items sold, the types of items sold, the number of each item sold, and the price of each item sold. Which of the following CANNOT be determined from the bakery's data set?

• The total income from sales the bakery received in the past month

• Which customer most frequently purchases bread

• The item bought in the highest quantity in the past week

• Days when certain items sell the most

Which of the following is the most accurate statement about cleaning and filtering data?

• Using computing tools to filter raw data makes it impossible to analyze or draw accurate conclusions

• Filtering and cleaning data is a fully automated process that should not require human input or intervention

• Filtering and cleaning data is necessary to ensure that data is in a form that is better for computers to process

• Filtering and cleaning data is a human process that cannot involve the use of computers

Which of the following is the most accurate description of what is known as the "digital divide"?

The digital divide is about how…

• People's access to computing and digital technology increases over time through a process of dividing and growing quickly – it is often likened to the biological process of cell growth.

• People's access to computing and the Internet differs based on socioeconomic or geographic characteristics t

• People's access to computing technology is affected by the fact that newer devices that use new protocols makes it more difficult for them to communicate with older devices and technology

• The amount of data on the Internet is growing so fast that the amount of computing power and time we have to process it is lagging behind