Hackerrank Control Flow and Looping 3

Question 1

What is the output of:
```python
for i in range(3):
    print(i)
else:
    print('done')
```

Accepted Answer

0 1 2 done

Answer

The loop prints 0, 1, 2, and then the else clause prints 'done' because no break occurred.

Question 2

Which of the following creates an infinite loop?

Accepted Answer

while 1 == 1: pass

Answer

1 == 1 is always True, creating an infinite loop with no break condition.

Question 3

What is the result of this nested conditional?
```python
a, b = 3, 7
if a > b:
    print('A')
elif a == b:
    print('B')
elif a < b:
    print('C')
else:
    print('D')
```

Accepted Answer

C

Answer

3 < 7 is True, so the third elif branch executes and prints 'C'.

Question 4

How many times does 'hello' print?
```python
i = 10
while i > 0:
    print('hello')
    i -= 3
```

Accepted Answer

4

Answer

i takes values 10, 7, 4, 1 (all > 0), so 'hello' prints 4 times before i becomes -2.

Question 5

What does `zip()` return when used with two lists of different lengths in a for loop?

Accepted Answer

It stops at the shorter list's length

Answer

zip() stops producing tuples when the shortest iterable is exhausted.

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Hackerrank Control Flow and Looping 3