(1/8)APCS 17 WEEKS until AP EXAM (old 7 wks)

Which of the following is true of how computers represent numbers?

• Using a fixed but large number of bits can eliminate the possibility of round off error when representing numbers in binary
• With a fixed number of bits some numbers are too large to represent in a computer which will lead to overflow errors.
• Using a fixed but large number of bits, for example 128, eliminates the possibility of overflow errors.
• With a large but fixed number of bits it is possible to eliminate either round-off errors or overflow errors, but not both.
• I have not learned this yet.

Convert the binary number 1001 to decimal (base-10).

• 9
• 10
• 16
• 17
• I have not learned this yet.

Which of the following is true of lossy and lossless compression algorithms

• Lossy compression algorithms are used when perfect reconstruction of the original data is important.
• Lossy compression algorithms are typically better than lossless compression algorithms at reducing the number of bits needed to represent a piece of data.
• Lossless compression algorithms are only used to compress text data.
• Lossless compression algorithms only allow for an approximate reconstruction of the original data.
• I have not learned this yet.

Which of the following is true of how the Internet has responded to the increasing number of devices now using the network?

• The Internet protocols are changed every year to adapt to the new devices that have been connected to the network
• While the number of devices connected to the Internet has grown, the network itself has not grown
• The protocols of the Internet were designed to scale as new devices are added
• The protocols of the Internet are no longer necessary thanks to the large number of devices now connected to the network
• I have not learned this yet.

Which of the following is true of how packets are sent through the Internet?

• Packet metadata is only included on important packets to indicate they should get access to faster paths through the network
• Packet metadata is used to route and reassemble information travelling through the Internet
• Information sent through the internet is only encapsulated in packets if the message is too large to be sent as a datastream
• Information sent through the internet is split into two packets, one which contains the message and another which contains the metadata
• I have not learned this yet.

If the user does NOT click the button what color will "topButton" be when this program finishes running?

• red
• blue
• green
• orange
• I have not learned this yet.

Which line of code in this program is MOST likely to result in an error?

• Line 1
• Line 2
• Line 3
• Line 4
• I have not learned this yet.

Which of the following BEST describes the differences between sequential and event-driven programming?

• In sequential programming commands run one at a time. In event-driven programming all commands run at the same time.
• In sequential programming commands run faster than in event-driven programming.
• In sequential programming each command is run many times in sequence. In event-driven programming all commands are run a single time as an event.
• In sequential programming commands run in the order they are written. In event-driven programming some commands run in response to user interactions or other events.
• I have not learned this yet.

This function chooses the screen to display based on the score. What is the correct way to call this function? (Look carefully)

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• 
• 
• 
• I have not learned this yet.