CSC 141 / QUIZ 2 / UNGRADED PRACTICE

A little practice before Tuesday.

Twelve short questions to help you prepare for Quiz 2. Predict first, choose an answer, then read the explanation.

Quiz: Tuesday, September 29, 2026, 11:00–11:15 AM.
Classes 6–7. Ten multiple-choice questions on nested decisions, testing, and debugging.

These are different questions from the graded quiz. Practice as often as you like. No name, student ID, or submission is required; this page does not record a grade.

Course home · Quiz 1 practice

What to review

Nested if / else and matching each else to its if by indentation.
if / elif chains, including why the order of conditions matters.
Boundary testing: choosing inputs below, at, and above a threshold.
Syntax errors, runtime errors, and logic errors, and how to tell them apart.

For each snippet, trace the conditions from top to bottom, track which branch runs, and write the exact output before checking it. The quiz will not ask you to write a complete program.

01 What does this program print?

bridge_open = False
has_pass = True
if bridge_open:
    if has_pass:
        print("Cross")
    else:
        print("Wait")
else:
    print("Closed")

CrossWaitClosedNothing

02 What does this program print?

score = 85
if score >= 80:
    print("Pass")
elif score >= 90:
    print("Honors")
else:
    print("Fail")

PassHonorsFailPass and Honors

03 A rule charges nothing for fewer than 10 items, $1 each for 10 through 20 items inclusive, and a different rate above 20. Which set of inputs tests both boundaries?1, 2, 39, 10, 20, 2115, 16, 170, 100, 200

04 Which line is missing something Python needs to parse it?if age == 18:if age == 18if age >= 18:if age != 18:

05 What happens when this program runs and the user types 20?

age = input("Age: ")
is_adult = age >= 18

Prints TrueTypeError comparing str and intPrints "20"Prints False

06 A rule gives a discount for totals of $100 or more. What is discount for total = 100 in this code?

total = 100
if total > 100:
    discount = True
else:
    discount = False

TrueFalse100An error

07 What does this program print for level = 25?

level = 25
if level >= 20:
    print("High")
if level >= 10:
    print("Medium")

HighMediumHigh then MediumNothing

08 A rule gives a senior discount at age 65 or older. Which three ages best test this boundary?60, 65, 701, 50, 10064, 65, 660, 65, 130

09 When a program crashes with a traceback, what is the most useful place to look first?The first blank line of outputThe last line of the traceback and the line number it namesThe name of the Python file onlyThe total number of lines in the program

10 What happens when this program runs with member = False?

member = False
if member:
    price = 4
print(f"Price: ${price:.2f}")

Prints Price: $0.00Prints Price: $4.00NameError: name 'price' is not definedSyntaxError

11 For an if/elif/else with three branches, what is the minimum number of test cases needed to run every branch at least once?123As many as possible

12 What does this program print?

minutes = 60
if minutes < 30:
    fee = 0.0
elif minutes <= 60:
    fee = 2.0
else:
    fee = 4.0
print(fee)

0.02.04.0An error