CMU CS Academy Unit 2 Part 5

What operation can you perform with mouse coordinates to adjust object positions?

• Subtraction only

• None, positions are fixed

• Any mathematical operation

• Multiplication only

Why must you ensure math operations keep values within a specific range?

• To avoid runtime errors

• To speed up the program

• To use less memory

• To make the code shorter

What happens when you divide mouse coordinates by 4 in a canvas with a maximum value of 400?

• It reduces the canvas size

• It has no effect on the values

• It multiplies the values by 4

• It ensures values stay within 0 to 100

What is the purpose of ensuring circle opacity stays within 0 to 100?

• To decrease memory usage

• To increase program speed

• To prevent errors related to invalid opacity values

• To maintain color accuracy

How can you move an object to the right with each mouse press?

• Increase its x-coordinate

• Rotate the object

• Increase its y-coordinate

• Decrease its x-coordinate

What is the result of adding 10 to the left coordinate of an object?

• It moves the object to the left

• It moves the object down

• It moves the object up

• It moves the object to the right

What does incrementing an object's position demonstrate?

• How to change object color

• How to animate objects

• How to rotate objects

• How to resize objects

What does the '+=' operator do?

• Sets a property to a specific value

• Adds a value to a property

• Divides a property by a value

• Subtracts a value from a property

How can you decrement a property value with a shortcut?

• Using '-=' operator

• Using '+=' operator

• Using '/=' operator

• Using '*=' operator

Why are operation shortcuts useful in programming?

• They make the code longer

• They reduce the clarity of the code

• They increase the execution time

• They simplify common tasks