APCSP SPRING FINAL 25

Which of the following best describes what the mystery procedure does?

• Continuously prompts the user for a song and adds it to a list. Once the user enters Exit, the procedure returns the last song entered.

• Prompts the user for a song and adds it to a list. The procedure then returns the song entered.

• Continuously prompts the user for a song and adds it to a list. Once the user enters Exit,Exit is added to the list and the procedure returns the list of songs entered.

• Continuously prompts the user for a song and adds it to a list. Once the user enters Exit, the procedure returns the list of songs entered.

Computer systems understand ____ numbers​.

• Octal

• Binary

• Hexadecimal

• Decimal

Which number system has a number base of 10?

• Hexadecimal

• Binary

• Decimal

• Octal

Binary equivalent of decimal number 25 is:

• 011111

• 011001

• 010011

• 011101

Your manager at Spotify is considering implementing a plan to compress data by reducing the sampling rate for the songs. They have asked you to put together a presentation outlining some of the benefits of using a data compression method like this. Which of the following would not be a valid point to include in your presentation?

• Compressing the data like this will be a lossless data compression and it will be possible to revert back to the original version in the future if the company chooses to do that.

• Compressing the data like this will save disk space and allow the company to expand their digital library with new songs from new artists.

• 1. 
     

     Compressing the data like this will result in less bandwidth for the company as they stream songs to the users.

• Compressing the data like this will make it downloads smaller for the user, which could result in less buffering while waiting for a song to download

Which of the following statements about lossy data compression is NOT true.

• Many pictures can be saved in a lossy format without telling any difference from the original

• Text files cannot easily be compressed in a lossy format

• Given two files of the same size, one compressed with lossy and the other with lossless data, the files will take up the same amount of disk space

• Lossy data compression of an audio file will take longer to download than a lossless data compression of the same audio file

What is the maximum unsigned value that could be represented by an 8 bit number?

• 8

• 64

• 255

• 256

The IETF (Internet Engineering Task Force) is responsible for developing and overseeing internet standards. Which of the following is not a common protocol maintained by the IETF?

• Hypertext Transfer Protocol (HTTP)

• Internet Protocol (IP)

• 1. Simple Mail Transfer Protocol (SMTP)

  Answered

• 1. Global Positioning System (GPS)

Bryan received a new smart phone to replace his old smart phone. Which of the following best explains what happens when Bryan connects his new smart phone to the Internet?

• 1. A new Internet Protocol (IP) address is assigned to Bryan’s new smart phone.

• 1. A new device driver is assigned to Bryan’s new smart phone.

  Answered

• 1. The Internet Protocol (IP) address from Bryan’s previous smart phone is assigned to his new smart phone.

• 1. The device driver from Bryan’s previous smart phone is assigned to his new smart phone.

A local router at a coffee shop was recently configured to limit the bandwidth of customers connecting to the Internet. Which of the following best describes how customers will be impacted?

• 1. A limited of number customers will be permitted to access the internet at the coffee shop at a time.

• 1. Customers using the internet at the coffee shop will be restricted in the maximum amount of data that they can send and receive per second.

• 1. Customers using the internet at the coffee shop will be able to send and receive large files more quickly.

• 1. The number of packets required for customers to send and receive data over the internet at the coffee shop is likely to increase.

  Answered