1AKIFT POS Test (Group Extra)

2021-12-09

Max. 22 points

Name:

Task	Max.	Achieved
1	2
2	2
3	8
4	5
5	5
Sum	22

Grading: <11: 5, 11-13: 4, 14-16: 3, 17-19: 2, 20-22: 1

Answer the following statements indicating whether they are True or False.

0-2 correct: 0 points, 3 correct: 1 point, 4 correct: 2 points.

Statement	True	False
In Python, functions, modules, classes and loops create scope.
Programs written in C tend to run faster than programs written in Python.
Any `for` loop can be re-written as `while` loop.
C is still one of the most commonly used programming languages.

Each of the following multiple choice questions will be awarded with 1 point if all correct statements are checked and all incorrect statements are not checked.
1. Mark all code snippets that are valid Python 3.8
  def function(arg): pass
  function sum(arg): pass
  sum = lambda a, b: a + b
  dev sum(a=0, b=0): return a + b
2. Mark all correct statements
  
  f'value is {varname}' produces the same output as
  'value is {}'.format(varname)
  
  print(f'value is {varname}') produces the same output as
  print('value is', varname)
  
  print(f'value is {3.1752:.2f}') produces the same output as
  print('value is', 3.1752)
  
  f'{s} {t}' evaluates to the same as
  str(s) + ' ' + str(t)
What is the output of the following code snippets? Write exactly what the output of each snippet is if the snippet is the sole content of a Python file. If the output is an error message, it is enough to write “ERROR”. If there is no output, write "-".
1. ```
if __name__ == "__main__":
    import sys
    print(sys.exit(0))
```
  -
2. ```
def decode(text):
    return encode(text)
print(decode('apt-build moo'))
```
  ERROR
3. ```
def grmpfzotz():
    print('Hooray')
```
  -
4. ```
s = "Everyone wants to become a great programmer."
print(s[:3], s[-1])
```
  Eve .
Write a function sum_to(num) that takes an integer num >= 0 as sole argument. The function should return the sum of all positive integers <= num. In the function, assert that the input is ≥ 0 by using assert.
Grading: 1 point for correct function signature, 1 point for proper docstring, 1 for correct assertion, 2 for returning the correct result.
```
def sum_to(num):
    """
    Sum all numbers from 0 up to a given integer.

    Assert that no negative numbers are entered.
    """
    assert num >= 0, "argument must be >= 0"
    return int(num / 2.0 * (num + 1))
```
Write a function sumproduct(first iterable, second iterable) in Python that takes two sequences of numbers with equal length and returns the sum of the product of the numbers.
[e.g. sumproduct((1, 3, 4), (9, 2, 3)) ⇒ 1*9 + 3*2 + 4*3 = 27; sumproduct([3, 5], [2, 4]) ⇒ 26]. Add a proper docstring to receive full points.
Grading: 1 point for correct function signature, 1 point for proper docstring, 1 point for a doctest, 2 for returning the correct result.
```
def sumproduct(first, second):
    """
    Return the sum of the products of `zip(first, second)`.

    >>> sumproduct((1, 3, 4), (9, 2, 3))
    27
    """
    sum = 0
    for i, j in zip(first, second):
        sum += i * j
    return sum
```