comp sci unit 10 & 11 part 1 practice questions

Ridesharing applications such as Uber and Lyft have caused many taxi drivers to lose their full time jobs and benefits. This is an example of an unintended harmful effect that was caused by an innovation. a. true b. false

a. true

Internet protocol requires that every device connected to the Internet has an assigned address (IP address). The original protocol is IPv4. How many bits are required to store an IPv4 address? a. 128 b. 64 c. 32 d. 256

c. 32

What should metadata tell you about the data

Metadata can contain key details, or secret information that may not supposed to be shared.

Why is metadata important for a data set?

Metadata ensures that we will be able find data, use data, and preserve and re-use data in the future

How can metadata help you find specific data?

Metadata summarizes basic information about data, making finding & working with particular instances of data easier.

How is the bandwidth of a network measured? a. Bitrate. Higher bitrate means higher bandwidth. b. Voltage. Higher voltage means higher bandwidth. c. Frequency of waves. Higher frequency means higher bandwidth. d. Light. More light means higher bandwidth.

a. Bitrate. Higher bitrate means higher bandwidth.

Which of the following statements describes how mobile devices, the use of computers in more and more everyday interactions, and the ability to connect with other devices almost anywhere are changing society? I. People are able to use mobile devices for new applications such as finding directions or finding restaurants II. Data can be collected from thousands of sources and can be combined to provide new services to individuals and companies III. Buildings, cars, classrooms, and offices can now be engineered with sensors to automate tasks like adjusting the thermostat or even driving IV. Data that is collected can be used to identify social problems a. II, IV b. III c. I, III d. I, II, III, IV

d. I, II, III, IV

What does URL stand for? a. Underlying Request Layout b. Underlying Response Layout c. Uniform Resource Locator d. Usable Render List

c. Uniform Resource Locator

A natural science museum opened a new display that lets the visitors view animations of a coral reef. The animations show how the health of the coral reef varies based on water temperature, pollution levels, and the number of fish living around the reef. The visitors are able to choose a numerical value for each of the conditions. The exhibit's animations are determined by using a database to look up how healthy the coral reef is at the particular settings the visitor chooses and displaying a corresponding picture. What is the biggest advantage of using an interactive exhibit like this instead of showing a poster with the same information? a. The visitors will be more entertained by the exhibit, but won't learn any more than they would have from just looking at a poster. b. By allowing the visitors to interact with the exhibit, the visitors will be able to understand coral reefs better. c. The interactive display will be more visually appealing than a static poster. d. Scientists will be able to learn more about the coral reefs by tracking the visitors' interactions.

b. By allowing the visitors to interact with the exhibit, the visitors will be able to understand coral reefs better.

Suppose you want to make a visualization that shows how many students bought certain quantities of candy from the vending machine during the month of September. Of the choices below, which chart would best convey this information to the person looking at the graph? a. Pie chart b. Histogram c. A map where the colors represent the number of candy bars bought d. Line chart

b. Histogram

What is the bitrate of a system? a. The number of bits used to encode a single letter b. The amount of data (in bits) that can be sent in a fixed amount of time c. The strength of the network connection d. The distance that data needs to travel in a network

b. The amount of data (in bits) that can be sent in a fixed amount of time

What is the fourth step of viewing a web page as described in the video? a. The Response: The server sends a response to the browser with the resource attached b. The Request: The browser sends a message to a server requesting a resource c. Rendering the Page: Your browser takes the resource and renders it in the browser window d. The URL: You type the URL for the web page into your browser

c. Rendering the Page: Your browser takes the resource and renders it in the browser window

What is the latency of a system? a. The amount of data (in bits) that can be transmitted at any given time b. The distance that data needs to travel in a network c. The time it takes for a bit to travel from sender to receiver d. The strength of the network connection

c. The time it takes for a bit to travel from sender to receiver

Which of the following statements is an example of computer readable data? a. A handwritten note b. Brain waves c. A physical photograph d. A digital spreadsheet filled with measurements about the air quality of different major cities

d. A digital spreadsheet filled with measurements about the air quality of different major cities

which of the following is not a cloud based application a. code hs b. gmail c. facebook d. microsoft word

d. microsoft word

What is the third step of viewing a web page as described in the video? a. The Response: The server sends a response to the browser with the resource attached b. The Request: The browser sends a message to a server requesting a resource c. Rendering the Page: Your browser takes the resource and renders it in the browser window d. The URL: You type the URL for the web page into your browser

a. The Response: The server sends a response to the browser with the resource attached

Which of the following algorithms is usually the most efficient to use for finding an item in a list, but requires the data to be sorted? a. binary search b. bubble sort c. merge sort d. linear search

a. binary search

What is the binary value for decimal number 18? a. 10100 b. 10010 c. 10001 d. 11001

b. 10010

What is data? I. Computer readable information II. Information collected about the physical world III. Programs that process images IV. Graphs and charts a. II, IV b. I, II c. I, II, IV d. I, II, III, IV

b. I, II

The Internet is a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols. In order to become a part of the internet a company must follow the suit of Internet Protocols. These protocols are defined and agreed upon by the: a. Bill Gates b. Internet Engineering Task Force (IETF) c. Internet and Website United Nations (IWUN) d. World Wide Web Consortium (W3C)

b. Internet Engineering Task Force (IETF)

What is the second step of viewing a web page as described in the video? a. The Response: The server sends a response to the browser with the resource attached b. The Request: The browser sends a message to a server requesting a resource c. Rendering the Page: Your browser takes the resource and renders it in the browser window d. The URL: You type the URL for the web page into your browser

b. The Request: The browser sends a message to a server requesting a resource

Shown here is the google search trend data for the search term "flu vaccine" What can we reasonably conclude from this data visualization? a. Exactly 100 people had a flu vaccine in October 2009 b. The highest interest in flu vaccines occurs in October each year, and will likely continue to occur in October in future years c. The highest number of flu infections happened in 2009 d. Taking vitamin B-12 can help reduce your risk of catching the flu

b. The highest interest in flu vaccines occurs in October each year, and will likely continue to occur in October in future years

Shown here is a line graph showing the stock prices for Twitter, Inc. (see picture) What is misleading about this visualization? a. The y-axis is upside down, so larger values are at the bottom and smaller values are at the top. b. The y-axis is truncated making the graph seem like it is increasing a lot more than it actually is. c. The graph is omitting data. d. The graph makes it seem like the increase in stock prices are caused by the month that they are sold/bought.

b. The y-axis is truncated making the graph seem like it is increasing a lot more than it actually is.

Which of the following statements is true about data visualizations? a. Visualizing data has only been possible since computers have become widespread. b. Visualizations take many forms, from tables to charts to images. c. There is always one exact visualization that should be used to show a particular aspect of a dataset. d. The only way to extract information from data is by using a visualization.

b. Visualizations take many forms, from tables to charts to images.

The video described several different kinds of charts that we commonly use to visualize data. In which of the following would one of the charts described help to accomplish the accompanying task described? a. You want to track the number of times you say "hello" today. b. Your school wants to track how many people attend the football games over time throughout the school year. c. You are trying to figure out what happens when different colors are mixed. d. You need instructions on how to bake a cake.

b. Your school wants to track how many people attend the football games over time throughout the school year.

Which of the following are computing innovations (choose all that apply): a. fiber optic cable b. laptop c. uber eats d. snapchat e. pokemon go f. USB C cable g. catapult

b. laptop c. uber eats d. snapchat e. pokemon go

Which of the following hardware devices used for input? (choose all that apply) a. printer b. mouse c. keyboard d. speakers e. microphone

b. mouse c. keyboard e. microphone

As part of the Create Task program, you MUST demonstrate the use of iteration in code. Which one of the following did you put in your code to show iteration? (There is more than one correct answer but you only need to choose the one you used.) a. if/else statement b. while loop c. if statement d. for loop

b. while loop d. for loop

Suppose a student named Marcus wants to learn about the sleeping habits of students in his class. Marcus wants to collect data from his classmates to learn how many hours of sleep his classmates get. He then wants to process this data with a computer and visualize it in a Histogram. Which of the following would be the best technique for Marcus to collect this data? a. Marcus should ask each of his classmates to write down on a piece of paper how many hours of sleep they get per night and hand the paper to him. b. Marcus should have them download an app that tracks their phone geolocation and activity so he can see when their phones are in their rooms and not being used. From this data he can figure out how long each student sleeps. for c and d see the picture

c is the correct answer

Suppose we used an Internet Addressing protocol that used 4 bits to encode a single address. How many devices would be supported on the Internet? How many unique addresses would there be? a. 4 b. 8 c. 16 d. 32

c. 16

What is the Internet Protocol (IP)? a. A set of rules describing what behavior is acceptable on the Internet b. A law that says that the Internet is for everyone c. A protocol that defines the structure of an Internet address and assigns a unique address to every device on the Internet d. An agreement that sets a limit on the number of computers than can be on the Internet at any given time

c. A protocol that defines the structure of an Internet address and assigns a unique address to every device on the Internet

Which of the following are ways that data is collected about you: I - Websites store data that tracks how you use the website II - Websites store cookies in your browser so that the next time you visit the website things like your profile login and recent activity are saved III - Some apps store geolocation information from your phone to track your location IV - Transaction data is stored by credit card companies when you purchase things with a credit card a. I only b. II only c. I, II, III, and IV d. I, II, and IV

c. I, II, III, and IV

Which of the following statements are true about the Internet? I - The Internet connects devices and networks all over the world II - The Internet helps people collaborate to solve problems III - The Internet helps people communicate IV - There are no negative consequences of the Internet, it is purely positive a. I only b. I and II only c. I, II, and III d. I, II, III, and IV

c. I, II, and III

Which of the following statements are true about using visualizations to display a dataset? I. Visualizations are visually appealing, but don't help the viewer understand relationships that exist in the data II. Visualizations like graphs, charts, or visualizations with pictures are useful for conveying information, while tables just filled with text are not useful. III. Patterns that exist in the data can be found more easily by using a visualization a. I and II b. II and III c. III only d. I, II, and III

c. III only

News reporting agencies often want to find the public's opinion on current events. One particular agency is considering two different strategies to collect this data by collecting responses to online surveys. The two strategies are outlined below. Strategy One: 1. Uses a database to store all of the survey responses 2. Stores some data as text and some data as numbers 3. Will track extra information about the survey taker that won't be publicly visible Strategy Two 1. Uses a single spreadsheet to store all of the survey responses 2. Stores all data as numbers 3. Will not track any information other than the survey responses Which of the following statements is the most accurate comparison of these strategies? a. Strategy One will make it easier to sort and filter the data, while Strategy Two will make it easier to graph the data b. Strategy One will cause problems because of the mixed data types, while Strategy Two will make it very easy to find specific data. c. Strategy One will allow the agency to conclude more about the public's opinion because it tracks extra metadata, while Strategy Two will make it hard to find trends and access particular pieces of the data. d. Strategy One will require less cleaning and manipulation of the data, while Strategy Two will require a significant amount of extra computation to use the data.

c. Strategy One will allow the agency to conclude more about the public's opinion because it tracks extra metadata, while Strategy Two will make it hard to find trends and access particular pieces of the data.

Which of the following statements is NOT a benefit of using computers to process data? a. People can use computers to find patterns in data and make predictions. b. Computers help people visualize data so that it is easy to extract useful information. c. Websites can spy on people and gather large amounts of personal data without the user knowing. d. Computers are able to easily process, manipulate, and display large amounts of data in a short amount of time.

c. Websites can spy on people and gather large amounts of personal data without the user knowing.

Polly and Sergei are working on a project to explain how the rise in oil prices is leading to a rise in lunch prices at their school. Polly wants to have a chart showing the oil prices every day over the past 18 months and a different chart showing the lunch prices every day over the past 18 months. Sergei argues that having two separate charts won't show the relationship between oil prices and lunch prices. He also thinks that the charts are showing too many data points. Instead, he wants to use a program to make a chart that shows both the oil prices and the lunch prices on the same chart. In addition, rather than plotting the prices for every day, he only wants to chart the average monthly prices for oil and lunch. Why would Sergei's approach make it easier for other people to analyze the data than Polly's approach? a. Sergei's chart would be much smaller than Polly's chart, so people wouldn't be overloaded with visual information. b. It is always better to put all of the data you want to analyze on the same chart. c. Polly's presentation is more likely to be misunderstood because it uses two charts. d. By transforming and summarizing the available data, Serge's chart would more effective in showing any trends that may have occurred.

d. By transforming and summarizing the available data, Serge's chart would more effective in showing any trends that may have occurred.

What is the first step of viewing a web page as described in the video? a. The Response: The server sends a response to the browser with the resource attached b. The Request: The browser sends a message to a server requesting a resource c. Rendering the Page: Your browser takes the resource and renders it in the browser window d. The URL: You type the URL for the web page into your browser

d. The URL: You type the URL for the web page into your browser

Which of the following is true about how computing has impacted data collection and visualization? a. large amounts of data can be quickly processed b. data can be instantly and continuously update c. addition of interactivity d. all of the above

d. all of the above