Reference Engine

Solutions Mastery

The centralized logic bank. Review and audit production-ready Python code for all 20 modules.

Phase 01: The Basics

Card 1: Tech Event

print("Event: Tech Conf")
print("Date: Dec 12")
print("Status: Active")

Card 2: Game Time

total = 135
hrs = total // 60
mins = total % 60
print(str(hrs) + "h " + str(mins) + "m")

Card 3: Security Gen

first = input("First: ")
last = input("Last: ")
print("ID: " + first + last)

Card 4: Age Check

age = int(input("Age: "))
is_adult = age >= 18
print("Can Enter: " + str(is_adult))

Card 5: Triangles

if side1 == side2 or side1 == side3:
    print("Isosceles")
else:
    print("Scalene")

Card 6: Complex Alarm

if sensor > 50 and not auto:
    print("ALARM")
elif sensor > 20:
    print("Monitor")
else:
    print("Idle")

Card 7: Ticket Count

tickets = 0
while tickets < 5:
    input("Click to sell...")
    tickets = tickets + 1
print("Sold Out")

Card 9: Grid Matrix

scores = [10, 20, 30]
scores[0] = 15
print(scores[0] + scores[2])

Card 11: Linear Seek

found = False
for x in data:
    if x == "Target":
        found = True
print(found)

Card 14: String Slice

# 3 chars first, 3 chars last, year
pw = first[0:3] + last[0:3] + year
print(pw)

Card 15: File I/O

f = open("scores.txt", "a")
f.write(name + "," + score + "\n")
f.close()

Card 17: 2D Grid

for row in grid:
    for item in row:
        print(item)

Card 16: Sort Swap

if nums[i] > nums[i+1]:
    t = nums[i]
    nums[i] = nums[i+1]
    nums[i+1] = t

Card 18: Range Gate

score = int(input("Score: "))
while score < 0 or score > 100:
    print("Invalid")
    score = int(input("Try again: "))

Card 19: SQL Order

SELECT name, score 
FROM users_data 
WHERE score > 100 
ORDER BY score DESC

Use these finalized patterns to audit your own code during exam practice sessions.