Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
100
Which of the following elements would be considered part of the user interface (UI) for an app? Choose all that apply.
A button that appears on the screen
An audible click that happens when the user taps the button
An error message that appears when something goes wrong
The color of the app's background screen
100
An OR gate is an electronic component with two inputs, A and B, such that *
the gate would be TRUE (or ON) when either or both A and B are TRUE (or ON)
100
What event causes the AndroidSprite to move to a new random location?*
Clock
100
Suppose you are sorting the following list of numbers in ascending order using bubble sort: [18, 5, -1, 4, 12, 19, 3, 10, 5, 4]. After the first pass through the numbers, what value would appear on the right of the list?
18
100
The Domain Name System *
creates IP addresses for clients and servers
200
Why are "if" blocks used in the "I Have a Dream" app?
"if" blocks are used to determine, when the buttons are clicked, whether a speech is already playing.
200
____________________ is a data compression technique in which no data are lost.
Lossless
200
What value would give the MoleTimer's TimeInterval property to have the Mole jump every 2 seconds.
2000
200
Suppose you are sorting the following list of words into alphabetical order using bubble sort: [parameter, procedure, abstraction, variable, integer, modulus, syntax, heuristics]. After the first pass through the list, what word would appear on the right of the list?
Variable
200
Caesar cipher, simple substitution cipher, and Vigenere cipher are all examples of __________ ciphers.
Symmetric
300
Which of the following are examples hardware?
CPU Main memory Integrated circuit Flash drive
300
________________is a data compression technique in which some amount of data is lost.
Lossy
300
Evaluate (3+8) mod 7
4
300
128.87.212.42 is an example of a/an
IP Address
300
A one-way function
s a function that is easy to compute in one direction but hard to compute in the other.
400
Which of the following are true statements about a computer's main memory?
It stores data.
It is called RAM, short for random access memory.
Any data stored in main memory disappears when the computer loses power.
400
Using a variable is an example of abstraction because *
a variable is more general and more abstract than a specific value such as 5.
using a variable instead of a specific value makes an app more generally useful.
a variable is an abstract symbol that can represent lots of different values.
using a variable instead of a specific value makes an app more vague. 24.
using a variable instead of a specific value makes an app more generally useful.
a variable is an abstract symbol that can represent lots of different values.
400
Which of the following statements describes a limitation of using a computer simulation to model a real-world object or system?
A. It is difficult to change input parameters or conditions when using computer simulations.
B. Computer simulations only run on very powerful computers that are not available to the general public.
C. Computer simulations can only be built after the real-world object or system has been created.
D. Computer simulations usually make some simplifying assumptions about the real-world object or system being modeled.
D. Computer simulations usually make some simplifying assumptions about the real-world object or system being modeled.
400
Bandwidth measures ___________________.
the amount of data that can be sent in a fixed amount of time
400
The key exchange problem is
the problem swapping Alice's key for Bob's key.
500
How long is a millisecond?
1/1000 of a second
500
Before you use a global variable in App Inventor 2, it must be: *
initialized
500
What shape would be drawn by IMAGE 1's algorithm? * 
hexagon with sides a length of 10 pixels
500
Latency measures ___________________.
the amount of time it takes to send data over the Internet
500
A polyalphabetic cipher *
Uses multiple alphabets