Mastering Python Loops, Functions, and Lists

Front

Which of the following is the correct syntax for a for loop that iterates over a list named `numbers` in Python? Options: `for numbers in i:`, `for i in numbers:`, `for i to numbers:`, `foreach i in numbers:`

Back

`for i in numbers:`

Front

What is the correct way to define a function in Python that takes no arguments and prints "Hello"? Options: `function hello(): print("Hello")`, `def hello(): print("Hello")`, `def hello: print("Hello")`, `function hello: print("Hello")`

Back

`def hello(): print("Hello")`

Front

Which of the following is a valid way to declare a single-dimensional array (list) of integers in Python? Options: `arr = [1, 2, 3, 4]`, `arr = (1, 2, 3, 4)`, `arr = {1, 2, 3, 4}`, `arr = <1, 2, 3, 4>`

Back

`arr = [1, 2, 3, 4]`

Front

Which of the following statements correctly creates a 2D array (list of lists) in Python? Options: `matrix = [[1, 2], [3, 4]]`, `matrix = ((1, 2), (3, 4))`, `matrix = {1, 2, 3, 4}`, `matrix = [1, 2, 3, 4]`

Back

`matrix = [[1, 2], [3, 4]]`

Front

What is the output of the following code?
```python
def add(a, b):
return a + b
print(add(2, 3))
```

Back

`5`

Front

Which of the following loop constructs will correctly print numbers from 10 down to 1? Options: for i in range(10,0,-1): print(i), for in range(1,10): print(i), for in range(10): print(i), for i in range(10,1-1): print(i)

Back

for i in range(10,0,-1):
print(i)

Front

Given the list `arr = [10, 20, 30, 40]`, which statement will change the second element to 25? Options: `arr[1] = 25`, `arr[2] = 25`, `arr[0] = 25`, `arr[3] = 25`

Back

`arr[1] = 25`

Front

Given a 2D array `matrix = [[1, 2], [3, 4]]`, how would you access the element `4`?

Back

`matrix[1][1]`