AP Computer Science: Unit 4 Questions with Verified Solutions
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AP Computer Science:
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AP Computer Science:
AP Computer Science: Unit 4 Questions
with Verified Solutions
How can you implement a "recursive function" to solve a problem?
You implement a recursive function by having it call itself with modified arguments,
typically including a base case to terminate the recursion.
What is the role...
AP Computer Science: Unit 4 Questions
with Verified Solutions
How can you implement a "recursive function" to solve a problem?
✔✔You implement a recursive function by having it call itself with modified arguments,
typically including a base case to terminate the recursion.
What is the role of the `__init__` method in a class?
✔✔The `__init__` method initializes an object’s attributes when the object is created, acting as a
constructor in a class.
How does "inheritance" work in object-oriented programming?
✔✔Inheritance allows a class (subclass) to inherit attributes and methods from another class
(superclass), promoting code reuse and hierarchical organization.
What is the difference between "public" and "private" attributes in a class?
✔✔Public attributes are accessible from outside the class, while private attributes are intended to
be used only within the class, often prefixed with an underscore.
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,How can you use a "decorator" to modify the behavior of a function?
✔✔A decorator is a function that takes another function as input and extends or modifies its
behavior without changing its code directly.
What is a "lambda function," and how does it differ from a regular function?
✔✔A lambda function is a small, anonymous function defined with the `lambda` keyword, used
for simple operations, while regular functions are defined with `def` and can be more complex.
How does "dynamic typing" affect variables in Python?
✔✔Dynamic typing allows variables to change types at runtime, meaning a variable can be
reassigned to a different type of value during execution.
What is the purpose of the `enumerate()` function in Python?
✔✔The `enumerate()` function adds a counter to an iterable and returns it as an `enumerate`
object, useful for iterating with both index and value.
How can you use the `filter()` function to process a list?
✔✔The `filter()` function applies a filtering function to each element of a list, returning only the
elements that satisfy a specified condition.
2
, What is a "dictionary" in programming, and how is it used?
✔✔A dictionary is a data structure that stores key-value pairs, allowing for efficient retrieval of
values based on their associated keys.
How can you retrieve a value from a dictionary using its key?
✔✔You can retrieve a value from a dictionary using the key in square brackets, like
`dictionary[key]`.
What is the purpose of the `pop()` method in a dictionary?
✔✔The `pop()` method removes and returns the value associated with a specified key, allowing
you to both retrieve and delete items.
How can you merge two dictionaries into one?
✔✔You can merge two dictionaries using the `update()` method or by using the `{**dict1,
**dict2}` syntax in Python.
What is the difference between a "set" and a "list" in Python?
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