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Computers
9th -
12thgrade
AP Computer Science Principles (Final Exam part 2)
30 questions
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- 1. Multiple Choice
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
- 2. Multiple Choice
Jasmine is writing a shopping app. She has created a variable to keep track of the number of items in the shopping cart. Every time someone clicks the "addItemButton", she would like the variable to increase by 1.
What code should Jasmine insert where it says <missing code> in order for her app to work?
cart total = 1;
cartTotal + 1;
cartTotal = cartTotal +1;
var cartTotal = cartTotal + 1;
var cartTotal + 1;
- 3. Multiple Choice
What is a possible output when the following code segment executes? The ending position of the turtle is shown in each diagram. The starting position is shown as a white triangle in cases where the turtle starts and ends in different locations.
- 4. Multiple Choice
A Boolean expression is an expression that evaluates to which of the of the following?
Yes/Maybe/No
True/False
Any Integer
Integers between 1 and 10
Any single character
- 5. Multiple Choice
Consider the following segment given in pseudo code. What will be displayed if grade is set to 70?
You passed!
Time to start studying again!
You passed! and Time to start studying again!
Nothing will be displayed
An error will occur on line 7; you cannot have an IF inside an ELSE statement
- 6. Multiple Choice
- 7. Multiple Choice
Which of the following is true about while loops ?
While loops terminate after a fixed number of loops that is pre-determined
While loops terminate after a fixed number of loops that is determined after the loop executes once.
While loops run as long as a given boolean condition is true.
While loops run as long as a given boolean condition is false.
While loops are known as "forever loops" and never stop until the program is halted by the user.
Answer
- 8. Multiple Choice
Which variable is named correctly?
BlueFish
Bluefish
blueFish
BLUEFISH
- 9. Multiple ChoiceWhich of the following is the best definition for callback functionProgram designed to run blocks of code or functions in response to specified events (e.g. a mouse click)Coding tasks involved in making your app respond to events by triggering functions.Function specified as part of an event listener; it is written by the programmer but called by the system as the result of an event trigger.A command (onEvent in App Lab) that can be set up to trigger a function when a particular type of event occurs on a particular UI element.
- 10. Multiple Choice
What is a Conditional Statement?
A part of the code that allows you to perform different actions depending on which is true or false
A variable that has a value of true or false
A part of the code that tells you if a value is less than another value
A part of the code that tests whether or not two values are equal
- 11. Multiple Choice
What Comparison operator can be used to check if someone is 18 or older?
age >= 18
age <= 18
age > 18
age < 18
- 12. Multiple ChoiceWhat is my result?
john = 8 .
if john > 6: .
. print("John is getting ice cream")
else: .
. print("John is getting apple juice")
. print("John is getting grapes")John is getting ice cream
John is getting grapesJohn is getting apple juice
John is getting grapesJohn is getting apple juiceJohn is getting ice cream - 13. Multiple Choice
What does a “FOR LOOP” do? What is the variable, “I”, used for?
a. FOR LOOP repeats a function for a set number of times; I is the number of times repeated
b. I is a parameter of the function, and for only performs an action if certain circumstances are met
c. The FOR LOOP is a function and I the absolute value of the function
d. The FOR LOOP controls the order functions are called on outside of the for loop; I is the number of functions it controls
- 14. Multiple Choice
moveForward() is an example of this:
Parameter
Function
Conditional
Library
- 15. Multiple Choice
This is a type of code that allows you to repeat a certain code over and over again without having to manually put it in.
Function
Parameter
Loop
API
- 16. Multiple ChoiceWhat is an example of abstraction?a. A loop to draw multiple birdsb. A function to draw a birdc. moveForward (25)d. arcLeft (90)
- 17. Multiple Choice
A collection of commands / functions, typically with a shared purpose:
Documents
File
Library
Folders
- 18. Multiple Choice
This is known as a precise sequence of instructions for processes that can be executed by a computer and are implemented using programming languages.
Function
Parameter
Algorithm
Command
- 19. Multiple Choice
Which of the following is FALSE regarding algorithms?
Option 1: Different algorithms can be developed to solve the same problem
Option 2: Different code can never be written to implement the same algorithm
Both Option 1 and 2 are true
Both Option 1 and 2 are false
- 20. Multiple Choice
When your programming is achieving some desired outcome while minimizing wasted effort or resources, we would say that its:
Top Notch
Comparable
Efficient
Problematic
- 21. Multiple Choice
In creating the snowflake you see above, which of the following function names would probably NOT be used in your code?
drawSnowflake()
drawBranch()
drawCross()
Any of these three (functions can be named however you want)
- 22. Multiple Choice
Looking at the image above, looping (through iteration) can be seen in which of the following lines of this algorithm?
Line 2
Line 7
Line 3
Line 9
- 23. Multiple ChoiceAn IF statement can have IF statements inside of itTrueFalse
- 24. Multiple Choice
Which of the following is FALSE regarding file sizes?
1 Terabyte = 1,000 kilobytes
1 Petabyte = 1,000 Terabytes
1 Megabyte = 1,000 bytes
1 Terabyte = 1,000 gigabytes
- 25. Multiple Choice
The number of pixels in a given area is called:
Resolution
Density
RGB
Hexidecimal
- 26. Multiple Choice
Which of the following is TRUE regarding data compression?
Data compression is only useful for files being transmitted over the Internet
Regardless of the compression technique used, once a data file is compressed, it cannot be restored to its original size.
Sending a compressed version of a file ensures that the contents of the file cannot be intercepted by an unauthorized user.
There are trade-offs involved in choosing a compression technique for storing and transmitting data.
- 27. Multiple ChoiceHow you would alter the RGB settings to brighten it?increase the RGB valuesdecrease the RGB values
- 28. Multiple ChoiceImage resolution is an example ofdatametadatafalse advertisinghexadecimal encoding
- 29. Multiple ChoiceFor black and white images, a pixel is represented byone bitone byte12 bits8 bits
- 30. Multiple ChoiceA photographer is manipulating a digital image to lighten it because all of the RGB values in the image are less than 100, making it very dark. He does this by adding 20 to the R, G, and B values of each pixel, then overwriting the original image. What type of transformation is the photographer using on the digital image?Lossless transformationLossy transformationmultiband transformationChrome Sampling transformation
- Answer choicesTagsAnswer choicesTags