PCEP Practice Test 29 — 15 Questions

Question 1

A developer writes a loop to find the first even number in a list:

numbers = [3, 5, 8, 10]
for n in numbers:
    if n % 2 == 0:
        print(n)
        break
else:
    print('No even number')

What is printed?

Accepted Answer

8. A for loop's else clause executes only if the loop finishes without encountering break. Here the loop breaks when the first even value 8 is found, so the else is bypassed and only 8 is printed. The modulo test n % 2 == 0 correctly identifies even numbers.

Answer

No even number

Answer

8
10

Answer

8
No even number

Question 2

A programmer writes the following code: `x = 7` then `y = 2` then `z = x / y`. What is the data type and value of `z`?

Accepted Answer

`float` with value `3.5`. In Python 3, the division operator `/` always returns a float, even when dividing two integers that yield a whole number. For `x = 7` and `y = 2`, the result is `3.5`, stored as a `float`. This behavior differs from Python 2, where `/` performed integer division for integers. The `//` operator performs floor division and returns an integer when both operands are integers, but that is not used here.

Answer

`int` with value `4`

Answer

`int` with value `3`

Answer

`float` with value `3.0`

Question 3

A cashier script stores a price as a string and needs to apply a 10 percent discount. The code is:

price = "19.99"
discount = 0.10
final = price * (1 - discount)
print(final)

What happens when this code runs?

Accepted Answer

It raises a TypeError because a string cannot be multiplied by a float.. The * operator supports string repetition only when the other operand is an integer. Here the other operand is the float 0.9, so Python raises TypeError. To compute the discounted price the code must first convert the string to a number, for example float(price) * (1 - discount), and only then print the result.

Answer

It prints "19.99" repeated zero times, resulting in an empty string.

Answer

It prints 199.9 because the decimal point is ignored during multiplication.

Answer

It prints 17.991 because Python converts the string automatically.

Question 4

A programmer writes the following code to calculate the average of two numbers:

a = 5
b = 2
avg = a / b
print(avg)

What is the output?

Accepted Answer

2.5. In Python 3, the / operator performs true division and always returns a float. With a = 5 and b = 2, a / b evaluates to 2.5. The other options reflect common mistakes: confusing / with //, truncating the result, or assuming an error where none exists. The correct output is 2.5.

Answer

Error: division by zero

Answer

2

Answer

2.0

Question 5

A Python programmer writes the following code:

x = 5
y = 2
result = x / y
print(type(result))

What is printed?

Accepted Answer

. In Python 3, the division operator / performs true division and always returns a float, even if the result is a whole number. Therefore, 5 / 2 evaluates to 2.5, and type(result) is . The floor division operator // would return an integer if both operands are integers.

Answer

Answer

Answer

Question 6

A quiz program stores a user's score as score = 7 and the number of questions as total = 2. The developer writes percentage = score / total * 100. What value is displayed?

Accepted Answer

350.0. Python 3 uses true division for the / operator, so dividing two integers yields a float. With score = 7 and total = 2, 7 / 2 is 3.5, and 3.5 * 100 is 350.0. The expression evaluates left to right, so the multiplication by 100 cannot be skipped. The displayed value includes a decimal because the result type is float.

Answer

350

Answer

3.5

Answer

TypeError

Question 7

A Python programmer is analyzing the results of several expressions. Which TWO of the following expressions evaluate to a float value? (Choose two.)

Accepted Answer

4.0 // 2. In Python, the / operator always returns a float, so 4 / 2 yields 2.0. Additionally, floor division // returns a float if either operand is a float, so 4.0 // 2 yields 2.0. The other expressions involve only integers and use operators that return integers when both operands are integers. Thus, the expressions that evaluate to a float are 4 / 2 and 4.0 // 2.

Answer

4 + 2

Answer

4 * 2

Answer

4 // 2

Question 8

A Python script performs the following operations:

s = "Hello"
n = 5
result1 = s * 2
result2 = s + str(n)

Which TWO statements about the values of result1 and result2 are true? (Choose two.)

Accepted Answer

result1 is "HelloHello". String repetition with * produces a new string containing the original repeated the given number of times, so "Hello" * 2 yields "HelloHello". Concatenation with + requires both operands to be strings, so the integer must be converted using str before joining, producing "Hello5". Direct concatenation without conversion would raise a TypeError.

Answer

result1 is 10

Answer

result2 causes a TypeError

Answer

result1 is "Hello Hello"

Question 9

A Python script stores a product identifier as id = '0042'. A developer needs to print the numeric value 42 followed by the type of the converted value in one line. Which code produces the output '42 <class 'int'>'?

Accepted Answer

print(int(id), type(int(id))). Converting the string '0042' with int() yields the integer 42, discarding leading zeros, and wrapping that same call in type() reports <class 'int'>. Passing both results to print() inserts a space between them, matching the required output. The other choices either skip the numeric conversion or produce a float instead of an int.

Answer

print(float(id), type(float(id)))

Answer

print(str(id), type(id))

Answer

print(int(id) + type(int(id)))

Question 10

A Python script contains:

print(10 / 4)
print(10 // 4)
print(10 % 4)

What output does this produce?

Accepted Answer

2.5, 2, 2. True division with / yields a float result, while floor division with // discards the fractional part to give a whole number, and the modulo operator % gives the remainder. For 10 and 4, these produce 2.5, 2, and 2 respectively. Recognizing that / and // behave differently is essential when predicting numeric output in Python.

Answer

2, 2, 2

Answer

2.5, 2.5, 2

Answer

2.5, 2, 0.5

Question 11

A Python script contains the following code:

price = 19.99
quantity = 3
total = price * quantity
print(type(total))

What is displayed when this script runs?

Accepted Answer

<class 'float'>. The multiplication of a float and an int in Python produces a float because Python applies numeric type promotion, converting the integer operand to a float before the operation. The variable total therefore holds a float, and type(total) displays the class object for floats. Integer output would require both operands to be int, and string output would require quoted text.

Answer

Answer

59.97

Answer

Question 12

A developer is debugging a script that uses a `while` loop to process items from a queue. The loop is intended to run until the queue is empty, but the script hangs indefinitely. Which of the following is the most likely cause?

Accepted Answer

The loop condition never becomes false because the queue is not being modified inside the loop.. An infinite `while` loop occurs when the loop condition never evaluates to false. If the queue is not being emptied, the condition `while queue:` remains true. The loop body must include an operation that removes items from the queue, such as `pop()` or `popleft()`, to eventually make the condition false and terminate the loop.

Answer

The `break` statement is missing from the loop body.

Answer

The loop uses `continue` instead of `break`.

Answer

The queue is a list, and lists cannot be used in `while` conditions.

Question 13

A developer is inspecting a variable and writes: value = 7.0 // 2. What is the value and type of the result assigned to 'value'?

Accepted Answer

3.0, of type float. Floor division // computes the quotient and rounds down to the nearest whole number, and the result is a float whenever either operand is a float. With 7.0 // 2, the quotient 3.5 floors to 3.0 and remains a float. The int result appears only when both operands are ints, and plain division would leave 3.5.

Answer

3.5, of type float

Answer

3, of type int

Answer

4.0, of type float

Question 14

A developer writes a script that records a product price. The line is:

price = 19.99

Later, the script runs print(type(price)). What is displayed?

Accepted Answer

<class 'float'>. Python infers a variable's type from the value assigned to it, and any numeric literal with a decimal point becomes a float. The type function returns the class of the object, and printing that class shows the type name in angle brackets. Since 19.99 includes a decimal point, the output is the float class.

Answer

Answer

Answer

Question 15

A Python developer is reviewing a script that contains several variable declarations. They want to identify which assignments use valid variable names according to Python's naming rules. Which TWO of the following variable names are valid? (Choose two.)

Accepted Answer

my_var. Valid Python variable names must start with a letter or underscore, followed by letters, digits, or underscores, and must not be a reserved keyword. `my_var` and `_private` satisfy these rules, while `2nd_place` starts with a digit, `class` is a keyword, and `my-var` contains a hyphen.

Answer

my-var

Answer

2nd_place

Answer

class