PCEP Practice Test 26 — 15 Questions

Question 1

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

Accepted Answer

_count. Option B, _count, is a valid Python identifier because it begins with an underscore, which is allowed, and contains only letters and underscores. Option E, myVar, is valid because it starts with a letter and uses only alphanumeric characters with no spaces or punctuation. Option A, class, is invalid because it is a reserved keyword in Python and cannot be used as a variable name. Option C, my-var, is invalid because hyphens are not permitted in identifiers; only letters, digits, and underscores are allowed. Option D, 2ndPlace, is invalid because an identifier cannot begin with a digit.

Answer

class

Answer

my-var

Answer

2ndPlace

Question 2

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

Accepted Answer

my_var. Option B, my_var, is a valid Python identifier because it starts with a letter and contains only letters and underscores, which are permitted characters. Option D, _count, is also valid because a leading underscore is allowed in Python variable names and the rest of the name consists of legal characters. Option A, my-var, is invalid because hyphens are not allowed in identifiers and would be parsed as subtraction. Option C, 2nd_place, is invalid because identifiers cannot begin with a digit. Option E, class, is invalid because it is a reserved Python keyword and cannot be used as a variable name.

Answer

my-var

Answer

2nd_place

Answer

class

Question 3

Which TWO of the following are valid ways to create a variable with the integer value 100?

Accepted Answer

x = int('100'). Option C, x = int('100'), is correct because the int() constructor parses the string '100' and returns a genuine integer object with the value 100. Option D, x = 100, is correct because an unquoted numeric literal without a decimal point is directly an integer in Python, so x is bound to the int value 100. Option A, x = 0100, is not a valid way to get the integer 100 in Python 3, where a leading zero on a decimal literal is a syntax error (and in Python 2 it would denote octal 64, not 100). Option B, x = 100.0, creates a float, not an integer, even though its numeric value equals 100. Option E, x = '100', creates a string containing the characters 1, 0, 0, not an integer.

Answer

x = 0100

Answer

x = 100.0

Answer

x = '100'

Question 4

Which of the following variable names is valid in Python?

Accepted Answer

_count. (_count) is valid because Python allows identifiers to start with an underscore, and it contains only letters and underscores. Python variable names must start with a letter or underscore, followed by letters, digits, or underscores, and cannot be a reserved keyword.

Answer

1st_value

Answer

my-var

Answer

class

Question 5

Refer to the exhibit. Which of the following shows the correct output?

Accepted Answer

3.3333333333333335
3
1. The code `print(10/3)` performs floating-point division in Python 3, yielding `3.3333333333333335`; `print(10//3)` performs floor division, which truncates to the nearest integer less than or equal to the result, giving `3`; and `print(10%3)` computes the remainder of the division, which is `1`.

Answer

3.3333333333333335
4
1

Answer

3.0
3.0
1.0

Answer

3
3
0

Question 6

A developer writes the following code: a = 3; b = 2; c = a / b; d = a // b; e = a % b. What are the values of c, d, e?

Accepted Answer

c=1.5, d=1, e=1. In Python, the / operator performs true division, yielding a float result (3/2 = 1.5). The // operator performs floor division, which for positive numbers truncates the decimal part, giving 1. The % operator returns the remainder of the division, which is 3 - (1 * 2) = 1. Thus c=1.5, d=1, e=1.

Answer

c=1, d=1, e=1

Answer

c=1.5, d=1, e=0

Answer

c=1.5, d=1.5, e=0

Question 7

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

Question 8

A developer wants to create a list of even numbers from 0 to 10 inclusive. Which code snippet will correctly produce [0, 2, 4, 6, 8, 10]?

Accepted Answer

All of the above. All three code snippets produce the list [0, 2, 4, 6, 8, 10]. Option A uses the built-in `range()` function with a step of 2, starting at 0 and stopping before 11. Option B is a list comprehension that iterates over range(11) and filters numbers where the remainder when divided by 2 is 0. Option C multiplies each integer from 0 to 5 by 2, yielding the same even numbers. Therefore, D is correct.

Answer

list(range(0,11,2))

Answer

[x for x in range(11) if x%2==0]

Answer

[x*2 for x in range(6)]

Question 9

A developer wants to assign the value 3.14 to a variable and later change it to the integer 3. Which of the following is true?

Accepted Answer

This is allowed because Python is dynamically typed.. Python is dynamically typed, meaning variables can be reassigned to values of any type at runtime. The developer can first assign the float 3.14 to a variable and later reassign the integer 3 to the same variable without any type declaration or conversion function required.

Answer

This is allowed only if the variable was declared as a float.

Answer

This causes a TypeError because you cannot change types.

Answer

This is allowed only if you use the int() function during assignment.

Question 10

Given the code:
```python
name = input('Enter your name: ')
print('Hello, ' + name)
```
If the user enters 'Alice', what is the output?

Accepted Answer

Hello, Alice. The `print('Hello, ' + name)` statement concatenates the string literal `'Hello, '` (which includes a trailing space) with the user input `'Alice'`, producing the output `Hello, Alice`. The `input()` function returns the exact string entered by the user without any extra quotes or formatting.

Answer

Hello,Alice

Answer

Hello, 'Alice'

Answer

Hello, Alice

Question 11

Which FOUR of the following are correct uses of the print() function?

Accepted Answer

print('Hello', 'World', sep='-'). Option B is correct because print() accepts the keyword argument sep to define the separator between multiple arguments, so print('Hello', 'World', sep='-') outputs Hello-World. Option C is correct because print() can take multiple positional arguments and by default separates them with a single space, producing Hello World. Option D is correct because print('Hello') is the standard way to call print() with a single string argument, outputting Hello followed by a newline. Option E is correct because print() accepts arguments of different types, so print('Hello', 5) outputs Hello 5, converting the integer to its string representation. Option A is not correct because print 'Hello' is Python 2 statement syntax, not a valid call to the print() function in Python 3.

Answer

print 'Hello'

Question 12

What is the data type of z after executing z = 10 / 2?

Accepted Answer

float. Float because in Python, the / operator always performs true division and returns a float, regardless of the operands. This is a fundamental concept tested in the PCEP exam to distinguish between / and //.

Answer

bool

Answer

int

Answer

str

Question 13

A Python script reads this JSON and needs to check if port 8080 is allowed. Which expression correctly checks? Assume data is already parsed into a dictionary.

Accepted Answer

8080 in data["ports"]. The `in` operator checks for membership in a list. Since `data["ports"]` is a list (e.g., `[80, 443, 8080]`), `8080 in data["ports"]` returns `True` if 8080 is present. This directly tests whether port 8080 is allowed.

Answer

data["ports"].contains(8080)

Answer

data.get("ports") == 8080

Answer

"ports" in data

Question 14

After 'x = 5; x += 3', what is the value of x?

Accepted Answer

8. The compound assignment operator `+=` adds the right operand to the current value of the variable and assigns the result back. Starting with `x = 5`, the statement `x += 3` is equivalent to `x = x + 3`, which computes `5 + 3 = 8` and stores it in `x`.

Answer

5

Answer

3

Answer

15

Question 15

Which operator performs integer (floor) division in Python?

Accepted Answer

//. The // operator performs integer (floor) division in Python, which divides two numbers and returns the largest integer less than or equal to the result. For example, 7 // 2 returns 3, not 3.5, because it discards the fractional part and rounds down toward negative infinity for negative numbers.

Answer

%

Answer

/

Answer

**