Midterm Review

After running the code above, which of the following will display 3?

• DISPLAY(a)

• DISPLAY("a")

• DISPLAY(b)

• DISPLAY("b")

What is displayed when we run the code above?

• BREADPEANUT BUTTER

• PEANUT BUTTERBREAD

• BREADPEANUT BUTTERBREAD

• PEANUT BUTTERBREADPEANUT BUTTER

Danielle is programming a kitty simulator. Part of her code is shown here. What is displayed? when the code runs?

• 6 9 7

• 6 7 9

• 7 9 6

• 9 7 6

What is displayed when we run this code?

• 100 100

• 100 200

• 200 100

• 200 200

Imagine we are trying to determine a worker's hourly pay rate, based on how much they make per year. So far we have the code above. Which of the following will calculate the hourly rate correctly?

• hourlyRate undefined salary / (wksInYear / hrsInWeek)

• hourlyRate undefined hrsInWeek / wksInYear / salary

• hourlyRate undefined salary / hrsInWeek / wksInYear

Suppose we have a number x where

x MOD 10

is the same as x. What is the best description of x?

• It is equal to 10

• It is greater than 10

• It is less than 10

• It is a multiple of 10

A company can ship cargo on a freight train or a van. They pay $1000 to ship by freight train, no matter how many cars it takes. However, each train car holds 200 boxes, and the train company will only ship full cars. So any extra boxes have to be shipped by van. The van company charges $5 per box they ship. If the number of boxes is represented by the variable numBoxes, which expression correctly calculates the total cost to ship all the boxes?

• totalCost undefined 200 + (numBoxes % 1000) * 5

• totalCost undefined 200 + (numBoxes / 1000) * 5

• totalCost undefined 1000 + (numBoxes % 200) * 5

What is the difference between a decision problem and an optimization problem?

• decision problems are solved by just one computer, optimization problems use multiple computers

• decision problems have a linear efficiency, optimization problems have an exponential efficiency

• decision problems have a yes/no answer, optimization problems cannot be answered

• decision problems have a yes/no answer, optimization problems look for the best solution

What will the Python code output?

• 12

• 13

• 16

• 17

What will the Python code output?

• -10, -9, -8, 3, 4, 5

• -10, -9, -8, 4, 5, 6

• -10, -9, 3, 4, 5, 6

• -10, -9, -8, 3, 4