Variables Warm up Code.org CSP Unit 4

Front

What number will be output by the console.log command on line 7?

Back

100

Answer explanation

The variable bop is initialized on line 2. On line 3, the variable bop is assigned the value 10. On line 5, the variable bop is assigned the value 100. Since the most recent value bop has been assigned is 100, that is the value that will be printed by the command on line 7.

Front

What text will be output by the program? Options: less than 10, less than 20, less than 30, 30 or more

Back

30 or more

Answer explanation

Walking through the program line by line:

On line 1, the variable score is initialized and assigned the value 0.

On line 2, the variable score is assigned its current value (0) plus 10. On line 3, the variable score is assigned its current value (10) plus 10. On line 4, the variable score is assigned its current value (20) plus 10.

On line 5, the boolean expression score < 10 evaluates to false since the current value of score is 30, which causes the command on line 6 to not execute.

On line 7, the boolean expression score < 20 evaluates to false since the current value of score is 30, which causes the command on line 8 to not execute.

On line 9, the boolean expression score < 30 evaluates to false since the current value of score is 30, which causes the command on line 10 to not execute.

Since all of the if-else-if statements have evaluated to false, the command inside the else statement will run and the console prints 30 or more.

Front

What will be the order of letters printed to the console when this program is run? Options: a b c, a b c b c b c, a b c b c, a b c a

Back

a b c b c

Answer explanation

Line 1 will print out a, line 2 calls the function letters which will print b then c. Line 3 calls the function letters agan which will print b then c.

Front

A movie theater charges different ticket prices based on a customer's age. The prices are shown in the table below. The customer's age is stored in the variable age and the price is stored in the variable price. Which piece of code will correctly decide the price for each ticket?

Back

Answer explanation

There are multiple ways to write this conditional statement so that it correctly decides the price for each ticket. C is the only one of these choices that accomplishes that. Options A and B will assign a ticket price of $8 to anyone over the age of 12, including those 65 and older. Option D will assign a ticket price of $8 to everyone under the age of 65, including those 12 and younger.

Front

What will the value of the variable bags be at the end of the flowchart shown here?

Back

2

Answer explanation

Front

What is the result of running this program and clicking on a buttonUp button 20 times?
00 var Count
01 Count = 0
02 onevent(buttonUp, Click), Count = Count + 1

Back

Count = 20

Front

Determine if the following statement evaluates to true or false.
(age > 10) && (age < 20)

Back

true

Front

Determine if the following statement evaluates to true or false.
(day == "Tuesday") || (age < 12)

Back

false