For hacks, make a copy of this notebook and answer the questions or complete the code, as described in comments. Additionally, blog about any missed questions, or what you learned from this lesson.

3.5 Hacks

Binary Practice

Using psuedocode operators determine if the statements are true or false. The number type will be indicated in parentheses.

1. 90(D) = 1000(B)

  • B. False

2. 10(D) ≠ 0110(B)

  • A. True

3. 56(D) ≥ 111000(B)

  • A. True

3. 99(D) < 1110011(B)

  • B. True

Now, complete the binary truth tables

AND Operator
Value 1 Value 2 Result
1 1 1
1 0 0
0 1 0
0 0 0
OR Operator
Value 1 Value 2 Result
1 1 1
1 0 1
0 1 1
0 0 0
Not operator
Not Value Result
Not 1 0
Not 0 1

Python Practice 

# Practice with these statements

print(20 != 20) # How can you change the operator to print a value of False?

x = 30
y = 20
z = 10
print(x <= y + z) # How can this return true by only manipulating the operator?

# Manipulate the variables x, y, and z to make the below statement return true
print(x == z + y)

False
True
True

# Practice with these statements

print(20 == 20) # How can you change the operator to print a value of False?

x = 30
y = 20
z = 10
print(x > y + z) # How can this return true by only manipulating the operator?

# Manipulate the variables x, y, and z to make the below statement return true
print(x == z)

True
False
False

3.6 Hacks

AP Prep

1. What is displayed by this code?

  • result <-- 75
  • IF result < 80 { DISPLAY("Please schedule a retake.") }
  • ELSE { DISPLAY("Nice job!") }
  1. Nice job!
  2. Display
  3. Please schedule a retake.
  4. 75

Answer: 3, Please scedule a retake

2. How is an if statement different from an if-else statement.

  1. Extra words.
  2. An if statement will only go through a process if a condition is met. An if-else statement will go through code no matter the conditions.
  3. They are the exact same.
  4. An if statement will go through the entire code segment every single time and the if-else statement is always used in an algorithm, no matter the conditions.

Answer: 2, An if statement will only go through a process if a condition is met. An if-else statement will go through code no matter the conditions.

3. What would be most appropriate for this situation? Ben wants to check his bank account. If his car fuel is full, he will go to the bank. Otherwise, he will go home. If he goes to the bank, he will withdraw money only if his balance is above $1000.

  1. If statement
  2. If-else statement

Answer: 2, if-else statement

4. What would be most appropriate for this situation? Luke wants to play basketball. If it is sunny outside he will go to the park to play basketball.

  1. If statement
  2. If-else statement

Answer: 1, if-statement

Using Python 

animals = ["lion", "tiger", "wildebeest", "shark", "jellyfish", "blobfish", "raven"]

for i in animals:
    if i == "shark": # What boolean value does this statement cause?
        print("Fun Fact: The smallest shark is the dwarf lantern shark, and it is small enough to hold in your hand!")
    else:
        print(i)
    if i == "lion" or "raven":
        print("Animal lives in the desert")

# Practice
# Using only one more if statement, alter the code to print out a statement saying if an animal lives in the desert, based on booleans

lion
Animal lives in the desert
tiger
Animal lives in the desert
wildebeest
Animal lives in the desert
Fun Fact: The smallest shark is the dwarf lantern shark, and it is small enough to hold in your hand!
Animal lives in the desert
jellyfish
Animal lives in the desert
blobfish
Animal lives in the desert
raven
Animal lives in the desert

3.7 Hacks

Exercise 1

  • Create dictionaries for multiple food items, with the listed specifications
    • Chicken Alfredo, Meat: Chicken, Time to Prepare: 60 minutes
    • Cheese Quesadilla, Meat: None, Time to Prepare: 10 minutes
    • Beef Wellington, Meat: Beef, Time to Prepare: 150 minutes
  • Used nested conditionals, determine which meal you can cook, given that a) you have no meat at home, and b) you only have 30 minutes to make the meal
Yes = True
No = False

chickenAlfredo = {
    "meat": Yes,
    "timePrep": 60,
}

cheeseQuesadilla = {
    "meat": No,
    "timePrep": 10,
}

beefWellington = {
    "meat": Yes,
    "timePrep": 150,
}

def makeMeal(item):
    if item["timePrep"] <= 30:
        if item["meat"] == No:
            print("You can make this meal")
        else:
            print("You need meat to cook this meal")
    else:
        print("You do not have enough time to make this meal")

makeMeal(chickenAlfredo)
makeMeal(cheeseQuesadilla)
makeMeal(beefWellington)

You do not have enough time to make this meal
You can make this meal
You do not have enough time to make this meal

Exercise 2

Make a flowchart(here is one we used) and write pseudocode for the following scenario.

  • Mr. Yeung would like to grade live reviews.
  • He wants to see if each student has at least 2 issues on their project. If they don't they receive a score of 2.0.
  • If they have at least 2 issues, check that they have completed at least 5 of their scrumboard tasks.
  • If they have completed 5 scrumboard tasks, give the student a 2.7. If they have not completed 5 scrumboard tasks, give them a score of 2.5. If they have completed more than 5 tasks, give them a score of 3.0.
  • How much would a student with 3 issues and 1 complete scrumboard task receive?