AP Computer Science Principles Practice

Which of the following decimal (base-10) values is equivalent to the binary (base-2) value 101001?

• 22

• 37

• 41

• 82

Which of the following would be the most appropriate name for a variable?

• variable1

• t

• amountOfTimeRemainingInTheGame

• time_left

In order to be inducted into a school’s National Honor Society (NHS), they must meet certain criteria for their GPA, serviceHours and grade. The expression below indicates whether a student has been accepted as a member of the NHS.

(GPA = 3.65) AND (serviceHours = 30) AND (NOT grade = 9)

Which of the following values would indicate a student that would be accepted into NHS?

• GPA = 3.85, serviceHours = 45, grade = 9

• GPA = 3.50, serviceHours = 100, grade = 10

• GPA = 4.00, serviceHours = 15, grade = 11

• GPA = 3.65, serviceHours = 30, grade = 12

As of 2016, the selling of used digital media is illegal. Along with selling it, there are many other illegal uses of digital media. Which of the following would be a legal use of digital media?

• You download an app on your smartphone that allows you to ‘strip’ the audio from any YouTube music video and permanently keep that audio in your music collection.

• You make an MP3 copy of a song because the CD you bought expressly permits you to do so, and then you put your MP3 copy on the Internet, using a file-sharing network, so that millions of other people can download it.

• You have a computer with a CD burner, which you use to burn copies of music you have downloaded onto writable CDs for all of your friends.

• You download a song from iTunes and sync it to the cloud so that it is accessible on all of your devices.

Which of the following is an advantage that text-based programming languages (e.g., Processing) have over block-based programming languages (e.g., Scratch)?

• Text-based programming languages allow programmers to write programs in English and other natural languages.

• Text-based programming languages do not require the programmer to worry about syntax, capitalization, or punctuation.

• Programs written in text-based programming languages do not require debugging.

• Text-based programming languages offer programmers more detailed control over lower-level functionality when writing a program.

A program is expressed in a programming language. Which of the following is true of the program?

• The program can also be expressed as binary code, but will be more easily understood by humans when expressed in a higher-level programming language.

• The program can also be expressed as binary code, which will reduce the likelihood of errors.

• The program cannot be expressed as binary code, because binary code can only be used to represent data.

• Some parts of the program can be expressed as binary code, but operations must be expressed using a higher-level programming language.

Which of the following best describes a Distributed Denial of Service (DDoS) attack?

• An attempt by a country to deny its citizens access to the Internet

• An attempt to deny users access to a Web site's resources by flooding the Web site with requests from multiple systems

• An attempt by one user to deny service to another user by posting material on a social network

• An attempt by a user of the Internet to get private information from a secure database

Consider the above code segment.

Which of the following best describes the result of running the code segment?

• The number 0 is displayed.

• The number 4 is displayed.

• The number 10 is displayed.

• Nothing is displayed; the program results in an infinite loop.

The volume of a rectangular prism is calculated by multiplying its length, width and height. What could be substituted into the section of the code marked < missing code > that would accurately calculate the volume based on the user input of l, w and h?

• l x w x h

• l * w * h

• l(w)(h)

• l / w / h

ASCII is a character-encoding scheme that uses a numeric value to represent each character. For example, the uppercase letter “G” is represented by the decimal (base 10) value 71. A partial list of characters and their corresponding ASCII values are shown in the table above.

ASCII characters can also be represented by binary numbers. According to ASCII character encoding, which of the following letters is represented by the binary (base 2) number 1010100?

• N

• P

• T

• W