Unit 2 Comp Sci Test Study

Which of the following actions is most likely to be effective in reducing the digital divide at a local level?

• Creating an application that offers coupons and discounts for local businesses

• Offering a discount to utility customers who pay their bills online instead of by mail

• Providing free community access to computers at schools, libraries, and community centers

• Requiring applicants for local government jobs to complete an online application

A student is creating an application that allows customers to order food for delivery from a local restaurant. Which of the following is LEAST likely to be an input provided by a customer using the application?

• 
  The address where the order should be delivered

• The cost of a food item currently available for order

• The credit card or payment information for the purchaser

• The name of a food item to be included in the delivery

Which of the following is a primary benefit of making a computing system fault-tolerant?

• If one component of the system fails, users of the system can often still access it.

• 
  If one component of the system is hacked, no information will be stolen.

• 
  If the system becomes too expensive, making it fault-tolerant will save money.

• 
  If the system cannot operate efficiently, making it fault-tolerant will speed up its operation.

Which of the following actions are likely to be helpful in reducing the digital divide?

Select two answers.

• 
  Designing new technologies intended only for advanced users

• Designing new technologies to be accessible to individuals with different physical abilities

• 
  Implementing government regulations restricting citizens’ access to Web content

• Having world governments support the construction of network infrastructure

A store uses binary numbers to assign a unique binary sequence to each item in its inventory. What is the minimum number of bits required for each binary sequence if the store has between 75 and 100 items in its inventory?

• 5

• 6

• 7

• 8

A student is recording a song on her computer. When the recording is finished, she saves a copy on her computer. The student notices that the saved copy is of lower sound quality than the original recording. Which of the following could be a possible explanation for the difference in sound quality?

• The song was saved using fewer bits per second than the original song.

• The song was saved using more bits per second than the original song.

• The song was saved using a lossless compression technique.

• Some information is lost every time a file is saved from one location on a computer to another location.

Which of the following school policies is most likely to have a positive impact on the digital divide?

• A school allows students to bring a graphing calculator from home to complete in-class mathematics assignments.

• 
  A school allows students to bring a tablet computer to class every day to participate in graded quizzes.

• A school provides a laptop or tablet computer to all students enrolled at the school.

• A school recommends that all students purchase a computer with as much processing speed as possible so that projects run faster.

Directions: The question or incomplete statement below is followed by four suggested answers or completions. Select the one that is best in each case.

Which of the following actions could be used to help reduce the digital divide?

I.   Providing free education and training on how to use computing devices
II.  Providing free or low-cost computing devices to low-income individuals
III. Providing networks and infrastructure to people in remote areas

• III only

• I and II only

• II and III only

• I, II, and III

Which of the following best describes the relationship between the World Wide Web and the Internet?

• The World Wide Web is a protocol that is accessed using a data stream called the Internet.

• The World Wide Web is a system of linked pages, programs, and files that is accessed using a data stream called the Internet.

• 
  The World Wide Web is a system of linked pages, programs, and files that is accessed via a network called the Internet.

• The World Wide Web is a Web site that is accessed using a protocol called the Internet.

A programmer is developing software for a social media platform. The programmer is planning to use compression when users send attachments to other users. Which of the following is a true statement about the use of compression?

• Lossless compression of video files will generally save more space than lossy compression of video files.

• Lossless compression of an image file will generally result in a file that is equal in size to the original file.

• Lossy compression of an image file generally provides a greater reduction in transmission time than lossless compression does.

• Sound clips compressed with lossy compression for storage on the platform can be restored to their original quality when they are played.