Python Questions

Diwakar Bhardwaj

Score: 🔥 51

Beginner

Took 2 months

Programming Language

Python

73%

Questions Attempted

15 / 15

Correct Answers

Incorrect Answers

Points Earned

🔥 11

Question 1

What is the correct way to write and run a Python script named 'my_script.py' from the command line?

python my_script.py
run my_script.py
execute my_script.py
python run my_script.py

Explanation:

To execute a Python script, you use the command 'python' followed by the name of the script file ('my_script.py' in this case).

Question 2

What is the output of the following Python code snippet?

print(True and False or True)

True
False
Error
None

Explanation:

In Python, the 'and' operator has higher precedence than 'or'. So, 'True and False' evaluates to False, and then 'False or True' evaluates to True.

Question 3

What is the primary purpose of using functions in Python?

To make the code more readable and organized.
To increase the execution speed of the program.
To reduce the memory consumption of the program.
To define data structures like lists and dictionaries.

Explanation:

Functions promote code reusability and organization. While they might indirectly contribute to efficiency, their primary role is not to directly speed up execution or reduce memory usage.

Question 4

What will the following Python code snippet print?

x = 5
if x > 10:
    print('A')
elif x > 3:
    print('B')
else:
    print('C')

A
B
C
The code will result in an error.

Explanation:

The code checks if x is greater than 10. Since it's not, it moves to the elif condition. As x is greater than 3, 'B' is printed.

Question 5

Which of the following is NOT a valid way to format a string in Python?

f-strings
format() method
% operator
concat() function

Explanation:

Python doesn't have a built-in concat() function for string formatting. The valid options are f-strings, the format() method, and the % operator.

Question 6

What will the following code print: print(10 > 5 and 'apple' == 'orange')?

True
False
Error
10appleorange

Explanation:

The expression uses the and operator. While 10 > 5 is True, 'apple' == 'orange' is False. For 'and' to return True, both conditions must be True.

Question 7

What is the maximum number of arguments a lambda function can take?

1
2
255
Unlimited

Explanation:

Lambda functions, despite their concise nature, can accept any number of arguments, making them versatile for various operations.

Question 8

What will the following Python code print to the console?

name = input("Enter your name: ")
print("Hello,", name)

Enter your name: Hello, [user's input]
Hello, [user's input]
Enter your name:
It will print nothing.

Explanation:

The code first prompts the user to enter their name. After the user provides input, the code then prints a greeting concatenated with the user's input.

Question 9

What is the difference between arguments and parameters in Python functions?

Arguments are the values passed to a function, while parameters are the variables listed in the function definition.
Parameters are the values passed to a function, while arguments are the variables listed in the function definition.
Arguments and parameters are interchangeable terms in Python.
Arguments are used for input, while parameters are used for output.

Explanation:

Parameters act as placeholders within the function definition, while arguments are the actual values supplied when calling the function.

Question 10

What is the output of the following Python code?

string = 'Hello, world!'
print(string[7:12])

world
world!
Hello
ello,

Explanation:

In Python, string slicing uses a zero-based index. string[7:12] extracts characters from index 7 (inclusive) to 12 (exclusive), resulting in the substring 'world'.

Question 11

How many expressions can a lambda function have?

Only one
Two
As many as needed
None, it only takes arguments

Explanation:

Lambda functions are limited to a single expression, which is evaluated and returned. This enforces their design for short, self-contained operations.

Question 12

What is the time complexity of checking if an element is present in a Python set?

O(1)
O(n)
O(log n)
O(n log n)

Explanation:

Sets in Python are implemented using hash tables, which allow for constant time complexity for checking membership. This means that the time it takes to check if an element is in the set does not depend on the size of the set.

Question 13

What will the following code snippet print?

x = 5
y = 2 * x
print(y)

5
2 * x
10
x * 2

Explanation:

The code assigns 5 to 'x', then calculates 'y' as 2 times 'x' (which is 10), and finally prints the value of 'y'.

Question 14

What will this code print?

for i in range(3): for j in range(2): print('*', end='') print()

** ** **

Explanation:

The outer loop iterates three times, and the inner loop iterates twice for each outer loop iteration. The end='' argument in the print statement prevents a newline after each asterisk, creating two asterisks per line.

Question 15

What is the output of the following code?

name = 'Alice'
age = 30
print(f'{name} is {age} years old.')

name is age years old.
Alice is 30 years old.
{name} is {age} years old.
Error

Explanation:

F-strings (formatted string literals) allow embedding variables directly within strings using curly braces {}. The code substitutes the values of name and age into the string.