computer science coding

Question 1

What is a variable in Python?

Answer 1

A variable stores data that can be used and changed in a program. Example: x = 5

Question 2

How do you create a list in Python?

Answer 2

Use square brackets. Example: my_list = [1, 2, 3, 4]

Question 3

What is a function in Python?

Answer 3

A function is a block of code that performs a specific task. Example:
python
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def greet():
print(“Hello!”)

Question 4

How do you write a loop that counts from 1 to 5?

Answer 4

python
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for i in range(1, 6):
print(i)

Question 5

What is an if statement used for in Python?

Answer 5

To make decisions in code. Example:
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if x > 10:
print(“x is greater than 10”)

Question 6

How do you write a comment in Python?

Answer 6

Use the # symbol. Example: # This is a comment

Question 6

What is a dictionary in Python?

Answer 6

A collection of key-value pairs. Example:
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my_dict = {“name”: “Aarav”, “age”: 16}

Question 7

What does the input() function do?

Answer 7

It gets user input as a string. Example:
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name = input(“Enter your name: “)

Question 8

How do you handle errors in Python?

Answer 8

Use try and except blocks. Example:
python
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try:
print(10 / 0)
except ZeroDivisionError:
print(“Cannot divide by zero!”)

Question 9

What does the len() function do?

Answer 9

It returns the length of a list, string, or other iterable. Example:
python
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len(“Hello”) # Output: 5

Question 10

How do you open and read a file in Python?

Answer 10

python
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with open(“file.txt”, “r”) as file:
content = file.read()

Question 11

What is a loop, and what types are there in Python?

Answer 11

Loops repeat code. Python has for loops and while loops.

Question 12

How do you define a class in Python?

Answer 12

python
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class Student:
def __init__(self, name):
self.name = name