Code HS Midterm Material Questions
and Answers Rated A+
Suppose you have a function that computes the area of a diamond. Which of the following
comments would be the best yo use?
//This is a function
// This functio
...
Code HS Midterm Material Questions
and Answers Rated A+
Suppose you have a function that computes the area of a diamond. Which of the following
comments would be the best yo use?
//This is a function
// This function computes the area
// Computes and returns the area of a diamond using the parameters height and width
The function doesn't need a comment ✔✔// Computes and returns the area of a diamond using
the parameters height and width
The following if statement should check that an object will fit on the screen. The variables height
and width store the height and width of the object. The variables screenHeight and screenWidth
store the dimensions of the screen.
Which of the following pairs correctly fills in the condition for the if statement below?
if(height _____ screenHeight) __ (width ___ screenWidth)){
// the object will fit completely on the screen
}
(height < screenHeight) && (width < screenWidth)
(height > screenHeight) && (width > screenWidth)
(height < screenHeight) || (width < screenWidth)
(height > screenHeight) || (width < screenWidth) ✔✔(height < screenHeight) && (width <
screenWidth)
In which of the following scenarios would it be best to use a for loop?
When you need to stop looping based on input from the user
When you need to check that a user's input is valid
When you want to ask the user for 10 numbers
When you need to be able to use the block of code in many places in your program. ✔✔When
you want to ask the user for 10 numbers
In which of the following scenarios would it be best to use a while loop?
When you need to change the color of one rectangle.
When you need to get and store the user's age.
When you need to find the average of 12 numbers.
When you need to loop as long as the user inputs even numbers. ✔✔When you need to loop as
long as the user inputs even numbers.
Why do programmers use variables?
Because that are lazy and don't want to write out equations every time.
It allows the programmer to reuse multiple lines of code.
They are a way to document functions.
To store values to easily reuse later and make code easier to read and understand ✔✔To store
values to easily reuse later and make code easier to read and understand
Which of the following while loops will make karel move until a wall is in the way?
while(frontIsBlocked()){
move();
}
while(frontIsClear()){
move();
}
while(facingEast()){
move();
}
while(noBallsPresent()){
move();
} ✔✔while(frontIsClear()){
move();
}
Which of the following pairs of keywords correctly fits in the code below?
____(frontIsClear()){
move();
}
____(ballsPresent()){
takeBall();
}
if, else
while, else
for, it
while, if ✔✔while, if
Which of the following choices is a valid and useful variable name?
2nd Number
myVariable
joes___variable
minNum ✔✔minNum
What is top down Design?
Starting with the most specific problems and then working up to solve the big problem.
Working from the top of your program and coding down to the bottom
Starting with the biggest problem and then working down to solve the more specific problems.
Implementing all of the functions first, then putting them together in the start function.
✔✔Starting with the biggest problem and then working down to solve the more specific
problems.
In order to ask the user for input and store the result as a string, you should use the function
_____. ✔✔read line
Most lines of code must end with a _______. ✔✔Semicolon
A(n) ____ is a series of steps or instructions that describe how to solve a problem. ✔✔Algorithm
A(n) _______ variable can either take the value true or false. ✔✔boolean
A(n) _____ variable stores whole numbers. ✔✔readint
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