Question Type: Conceptual

Which of the following best explains how data is typically assembled in packets for transmission over the Internet?

Each packet contains data to be transmitted, along with metadata containing information used for routing the data.

A sorted list of numbers contains 500 elements. Which of the following is closest to the maximum number of list elements that will be examined when performing a binary search for a value in the list?

10

A digital photo file contains data representing the level of red, green, and blue for each pixel in the photo. The file also contains metadata that describe the date and geographic location where the photo was taken. For which of the following goals would analyzing the metadata be more appropriate than analyzing the data?

Determining the likelihood that the photo was taken at a particular public event

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?

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

Which of the following statements describes a limitation of using a computer simulation to model a real-world object or system?

Computer simulations usually make some simplifying assumptions about the real-world object or system being modeled.

Each student that enrolls at a school is assigned a unique ID number, which is stored as a binary number. Te ID numbers increase sequentially by 1 with each newly enrolled student. If the ID number assigned to the last student who enrolled was the binary number 1001 0011, what binary number will be assigned to the next student who enrolls?

1001 0100

A video-streaming Web site uses 32-bit integers to count the number of times each video has been played. In anticipation of some videos being played more times than can be represented with 32 bits, the Web site is planning to change to 64-bit integers for the counter. Which of the following best describes the result of using 64-bit integers instead of 32-bit integers?

2^32 times as many values can be represented.

A certain computer has two identical processors that are able to run in parallel. Each processor can run only one process at a time, and each process must be executed on a single processor. The following table indicates the amount of time it takes to execute each of three processes on a single processor. Assume that none of the processes are dependent on any of the other processes. Which of the following best approximates the minimum possible time to execute all three processes when the two processors are run in parallel?

80 seconds

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

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

The table below shows the time a computer system takes to complete a specified task on the customer data of different-sized companies. Based on the information in the table, which of the following tasks is likely to take the longest amount of time when scaled up for a very large company of approximately 100,000 customers?

Sorting data

A user purchased a new smart home device with embedded software and connected the device to a home network. The user then registered the device with the manufacturer, setting up an account using a personal e-mail and password. Which of the following explains how a phishing attack could occur against the user of the smart home device?

The user is sent an e-mail appearing to be from the manufacturer, asking the user to confrm the account password by clicking on a link in the e-mail and entering the password on the resulting page.

Which of the following is a true statement about data compression?

There are trade-offs involved in choosing a compression technique for storing and transmitting data.

A certain social media Web site 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 data instead of the metadata?

To determine the topics that many users are posting about

A Web site uses several strategies to prevent unauthorized individuals from accessing user accounts. Which of the following is NOT an example of multifactor authentication?

When a user enters an incorrect password more than two times in a row, the user is locked out of the account for 24 hours.