PCEP Data Types, Variables, Basic I/O and Operators Practice Test 7 — 15 Questions

Question 1

Which THREE of the following are Python data types?

Accepted Answer

str. `str` is a built-in Python data type used to represent sequences of characters, i.e., strings. In Python, strings are immutable and are defined by enclosing text in single, double, or triple quotes.

Answer

math

Answer

None

Question 2

What is the output when the following code is executed?

try:
    print(1/0)
except ZeroDivisionError:
    print("Cannot divide by zero")

Accepted Answer

Cannot divide by zero. The code inside the try block attempts to divide by zero, which raises a ZeroDivisionError. The except block catches this exception and executes its print statement, outputting 'Cannot divide by zero'.

Answer

The program crashes with an unhandled exception

Answer

Result: 0

Answer

Unsupported operand

Question 3

What is the output of the following code?

config = {}
print('Not set' if config.get('timeout') is None else config.get('timeout'))

Accepted Answer

Not set. The code attempts to access a dictionary key 'timeout' that does not exist. Using square bracket access on a missing key raises a KeyError, but the code uses the .get() method, which returns None by default if the key is missing. Since the key 'timeout' is not in the dictionary, .get('timeout') returns None, and the print statement outputs 'Not set' because the condition `config.get('timeout') is None` evaluates to True.

Answer

KeyError: 'timeout'

Answer

None

Answer

False

Question 4

What is the output from the interactive Python session?

Accepted Answer

3 1. The expression `10 // 3` performs integer (floor) division, which discards the fractional part and returns the integer quotient 3. The expression `10 % 3` returns the remainder of the division, which is 1. Therefore, the output is `3 1`, making option B correct.

Answer

3.333 1

Answer

1 3

Answer

3 0

Question 5

A developer writes a script to calculate the average of three numbers: avg = (a + b + c) / 3. If a=5, b=10, c=15, what is the data type of avg?

Accepted Answer

float. In Python, the division operator (/) always returns a float, even when dividing integers that result in a whole number. Here, (5 + 10 + 15) / 3 equals 30 / 3, which yields 10.0, a float. Therefore, the data type of avg is float.

Answer

bool

Answer

int

Answer

str

Question 6

A program prompts a user for their age using input(). Which line of code correctly stores the age as an integer?

Accepted Answer

age = int(input("Enter age: ")). The `int()` function explicitly converts the string returned by `input()` into an integer, which is required for storing a numeric age value. The `input()` function always returns a string in Python, so without conversion, arithmetic operations would fail or produce unexpected results.

Answer

age = str(input("Enter age: "))

Answer

age = float(input("Enter age: "))

Answer

age = input("Enter age: ")

Question 7

Which of the following expressions evaluates to False?

Accepted Answer

3 >= 4. (3 >= 4) evaluates to False because the 'greater than or equal to' operator (>=) returns True only if the left operand is greater than or equal to the right operand. Since 3 is neither greater than nor equal to 4, the expression is False.

Answer

2 != 1

Answer

10 == 10

Answer

5 < 10

Question 8

A developer writes: total = 2 ** 3 + 4. What is the value of total?

Accepted Answer

12. In Python, the exponentiation operator (**) has higher precedence than addition (+). Therefore, 2 ** 3 is evaluated first, yielding 8. Then 8 + 4 equals 12. Option B is correct.

Answer

16

Answer

14

Answer

10

Question 9

What is the output of print(10 // 3, 10 % 3)?

Accepted Answer

3 1. The // operator performs floor division, which divides 10 by 3 and discards the fractional part, yielding 3. The % operator returns the remainder of that division, which is 1. The print function outputs both values separated by a space, resulting in '3 1'.

Answer

1 3

Answer

3.33 1

Answer

3 3

Question 10

Which of the following is a valid Python variable name?

Accepted Answer

_data2. (_data2) is correct because Python variable names must start with a letter or an underscore, and can contain letters, digits, and underscores. _data2 begins with an underscore followed by valid characters, making it a legal identifier.

Answer

my-var

Answer

for

Answer

2nd_value

Question 11

A developer wrote: x = 10; y = 5; x += y * 2. What are the values of x and y after execution?

Accepted Answer

x=20, y=5. The expression `x += y * 2` is evaluated as `x = x + (y * 2)`. Given `x = 10` and `y = 5`, `y * 2` equals 10, then `x + 10` equals 20, so `x` becomes 20. The value of `y` remains unchanged at 5 because the assignment operator `+=` only modifies `x`.

Answer

x=15, y=5

Answer

x=30, y=5

Answer

x=20, y=10

Question 12

What is the output of print(type(3 + 4.5))?

Accepted Answer

. In Python, when you add an integer (3) and a float (4.5), implicit type conversion (coercion) occurs: the integer is promoted to a float to avoid data loss. The result is 7.5, which is a float. Therefore, type(7.5) returns .

Answer

Answer

Answer

Question 13

A program checks divisibility. Which condition correctly determines if a number n is divisible by 7?

Accepted Answer

n % 7 == 0. The modulo operator (%) returns the remainder of the division of n by 7. If the remainder is 0, then n is exactly divisible by 7. This is the standard way to test divisibility in Python.

Answer

n / 7 == 0

Answer

n // 7 == 0

Answer

n % 7 != 0

Question 14

Which TWO of the following expressions produce the integer 5?

Accepted Answer

10 // 2. `10 // 2`, uses floor division in Python, which divides 10 by 2 and returns the integer quotient 5, discarding any fractional remainder. Option C, `int(5.7)`, truncates the decimal part of the float 5.7, converting it directly to the integer 5. Both expressions produce the exact integer value 5.

Answer

"5"

Answer

5.0

Answer

10 / 2

Question 15

Which TWO of the following are valid Python variable names?

Accepted Answer

var2. 'var2' starts with a letter and contains only alphanumeric characters and underscores, which satisfies Python's variable naming rules. Python variable names must begin with a letter or underscore, and can be followed by letters, digits, or underscores.

Answer

var name

Answer

1var

Answer

my-var