10th Grade 10 - IT Programming - 2nd Cycle Exam

What is the correct syntax to define a function in Python?

• function myFunction()

• def myFunction():

• function = myFunction()

• def: myFunction()

Answer explanation

The correct syntax to define a function in Python is 'def myFunction():'. This uses the 'def' keyword followed by the function name and parentheses, which is the standard way to declare functions in Python.

What is the main purpose of a lambda function in Python?

• To define a multi-line function

• To create an anonymous function

• To replace a list comprehension

• To modify an existing function

Answer explanation

The main purpose of a lambda function in Python is to create an anonymous function, which is a function defined without a name. This allows for quick, throwaway functions that can be used in places where a full function definition is not necessary.

Which of the following is a mutable data type in Python?

• Tuple

• List

• String

• Set

Answer explanation

In Python, a List is a mutable data type, meaning its contents can be changed after creation. In contrast, Tuples, Strings, and Sets are immutable, meaning their contents cannot be altered once defined.

How is a tuple different from a list in Python?

• Tuples are mutable, lists are not

• Tuples allow duplicates, lists do not

• Tuples are immutable, lists are mutable

• Tuples and lists are the same

Answer explanation

Tuples are immutable, meaning their contents cannot be changed after creation, while lists are mutable, allowing modifications. This key difference distinguishes how each data structure is used in Python.

What will len(set([1, 2, 2, 3])) return?

• 2

• 3

• 4

• 1

Answer explanation

The set function removes duplicates from the list [1, 2, 2, 3], resulting in {1, 2, 3}. The length of this set is 3, so len(set([1, 2, 2, 3])) returns 3.

What is the correct way to create a tuple with a single element?

• (5)

• [5,]

• (5,)

• {5}

Answer explanation

To create a tuple with a single element, you must include a comma after the element. Thus, (5,) is correct. (5) is just an integer in parentheses, [5,] is a list, and {5} is a set.

How do you add an element to a set in Python?

• set.append(5)

• set.add(5)

• set.insert(5)

• set.put(5)

Answer explanation

To add an element to a set in Python, use the 'add' method. The correct syntax is 'set.add(5)', which adds the element 5 to the set. The other options are incorrect as 'append', 'insert', and 'put' are not valid methods for sets.

Which method is used to remove all elements from a list?

• list.delete()

• list.clear()

• list.removeall()

• list.reset()

Answer explanation

The method list.clear() is specifically designed to remove all elements from a list, making it the correct choice. The other options do not exist in Python's list methods.

What does the map() function do in Python?

• Iterates over a dictionary

• Returns a list of keys

• Applies a function to every item in an iterable

• Creates a new tuple

Answer explanation

The map() function in Python applies a specified function to each item in an iterable (like a list or tuple), returning an iterator. This makes 'Applies a function to every item in an iterable' the correct choice.

What happens if you use a duplicate value in a set?

• It throws an error

• It adds the duplicate value

• It ignores the duplicate

• It removes all duplicates from the set

Answer explanation

In a set, duplicate values are not allowed. If you attempt to add a duplicate value, the set simply ignores it, maintaining only unique values. Therefore, the correct answer is that it ignores the duplicate.