Hackerrank - HackerRank Python Control Flow and Looping Questions and Answers

Question 1

What is the output of the following Python code snippet?

```python
for i in range(5):
    if i == 3:
        continue
    print(i, end=' ')
else:
    print('Loop finished', end='')
```

Accepted Answer

0 1 2 4 Loop finished

Answer

0 1 2 3 4 Loop finished

Answer

0 1 2 4

Answer

0 1 2

Question 2

A developer is writing a function but has not yet implemented its logic. To avoid an `IndentationError` for an empty code block, which keyword should be used as a placeholder?

Accepted Answer

pass

Answer

break

Answer

continue

Answer

return

Question 3

What will the following Python code print to the console?

```python
count = 5
while count > 1:
    print(count)
    count -= 1
    if count == 3:
        break
else:
    print('Done')
```

Accepted Answer

5
4

Answer

5
4
3

Answer

5
4
Done

Answer

5
4
3
2
Done

Question 4

Which of the following scenarios is the most appropriate use case for a `for` loop with an `else` block in Python?

Accepted Answer

Searching for an item in a list and performing an action only if the item is not found.

Answer

Iterating through a list to perform an action on every element.

Answer

Executing a block of code a fixed number of times.

Answer

Creating an infinite loop that waits for user input.

Question 5

Analyze the following nested loop. How many times will the `print('*')` statement be executed?

```python
for i in range(3):
    for j in range(i + 1):
        print('*')
```

Accepted Answer

6

Answer

3

Answer

9

Answer

5

Question 6

Given the following code, what will be the output if the `status_code` is `404`?

```python
status_code = 404
match status_code:
    case 200 | 201:
        print('Success')
    case 401:
        print('Unauthorized')
    case 404:
        print('Not Found')
    case _:
        print('Unknown Error')
```

Accepted Answer

Not Found

Answer

Success

Answer

Unknown Error

Answer

The code will raise a SyntaxError.