PCEP Practice Test 8 — 10 Questions

Question 1

A company has a Python script that imports a module from a package. The package structure is: mypackage/__init__.py, mypackage/module.py. The script uses 'from mypackage import module'. Which file must exist for this import to work?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

mypackage/__init__.py. For a Python import like 'from mypackage import module' to work, the directory 'mypackage' must be recognized as a package. This requires the presence of an __init__.py file inside it (even if empty), which signals to Python that the directory is a package and allows its submodules to be imported. Option B is correct because __init__.py is the file that makes 'mypackage' a package.

Answer

mypackage.py

Answer

module.py in the current directory

Answer

Only mypackage/module.py is needed

Question 2

Which expression evaluates to False?

Accepted Answer

3 > 4. The expression `3 > 4` evaluates to `False` in Python, as 3 is not greater than 4. All other options evaluate to `True` due to the correct application of comparison operators: `<=`, `==`, and `!=`.

Answer

3 <= 3

Answer

3 == 3

Answer

3 != 2

Question 3

A beginner writes: x = 10; y = "20"; print(x + y). What will happen?

Accepted Answer

It raises a TypeError. Python does not allow implicit type conversion between a string and an integer in an addition operation. The `+` operator with a string and an integer raises a `TypeError`, as Python's dynamic typing requires explicit conversion (e.g., `int(y)` or `str(x)`) for such mixed-type operations.

Answer

It prints 30 as a string

Answer

It prints 1020

Answer

It prints 30

Question 4

A developer writes a function that calculates the area of a rectangle and prints the result inside the function. Later, they need to use this area in another calculation. What should they do to make the function reusable and composable?

Accepted Answer

Modify the function to return the area instead of printing it.. Returning a value from a function allows the caller to capture and reuse that value in subsequent calculations, making the function composable and reusable. Printing the result inside the function (as in the original code) only outputs it to the console and discards the value, preventing further programmatic use. By modifying the function to return the area, the developer can assign the result to a variable and use it in other expressions.

Answer

Store the area in a global variable and access it later.

Answer

Keep the function as is and call it from inside another function.

Answer

Pass the area to the next calculation using a print function argument.

Question 5

Which of the following variable names is NOT valid in Python?

Accepted Answer

2nd_place. Python variable names cannot begin with a digit. The name '2nd_place' starts with '2', which violates Python's identifier naming rules. Valid variable names must start with a letter (a-z, A-Z) or an underscore (_), followed by letters, digits, or underscores.

Answer

My_Var

Answer

_myVar

Answer

myVar2

Question 6

What is the result of the following expression? 3 + 4 * 2 ** 3 // 5

Accepted Answer

9. The expression follows Python's operator precedence: exponentiation (`**`) has the highest precedence, then multiplication (`*`) and floor division (`//`) are evaluated left to right, and finally addition (`+`). First, `2 ** 3` computes to 8. Then `4 * 8` gives 32, and `32 // 5` yields 6 (floor division truncates toward negative infinity, but here it's positive). Finally, `3 + 6` equals 9. Thus, option A is correct.

Answer

7

Answer

6

Answer

11

Question 7

Which two of the following are valid Python variable names? (Choose two.)

Accepted Answer

value_2. `value_2` starts with a letter and contains only letters, digits, and underscores, which satisfies Python's identifier rules. Python variable names must begin with a letter or underscore, and can include letters, digits, and underscores; `value_2` meets all these criteria.

Answer

for

Answer

2nd_value

Answer

val-ue

Question 8

A developer runs the command and sees the output. Which statement about the data type is correct?

Accepted Answer

3.14 is a float in Python.. In Python, numeric literals with a decimal point, such as 3.14, are always interpreted as the built-in float type. Python does not have a separate 'double' type; its float is implemented as a C double (64-bit IEEE 754), but the language itself refers to it as float. This is a fundamental rule of Python's data type system.

Answer

3.14 is a decimal.Decimal type.

Answer

3.14 is a float, but Python also treats it as a double.

Answer

3.14 is a string.

Question 9

A developer needs to iterate over a list of network interfaces and print only the names that start with 'eth'. Which code should be used?

Accepted Answer

for iface in interfaces: if iface.startswith('eth'): print(iface). The `startswith()` string method is the most direct and readable way to check if each interface name begins with the substring 'eth'. This approach avoids unnecessary slicing or substring membership checks, making the intent clear and the code efficient.

Answer

for i in range(len(interfaces)): if 'eth' in interfaces[i]: print(interfaces[i])

Answer

for iface in interfaces: if iface[:3] is 'eth': print(iface)

Answer

for iface in interfaces: if 'eth' in iface: print(iface)

Question 10

What is the result of 'bool(0) and bool(1)'?

Accepted Answer

False. The expression `bool(0) and bool(1)` evaluates to `False` because `bool(0)` converts the integer 0 to `False` (since 0 is falsy in Python), and `bool(1)` converts 1 to `True`. The `and` operator returns `True` only if both operands are truthy; here, `False and True` yields `False`.

Answer

True

Answer

1

Answer

0