
Practice python Questions!
Authored by Ben Goldblatt
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given a custom Python class A, how can we make class A abstract?
custom Python classes are always abstract
specify the "abstract" keyword in one of its methods
specify "raise NotImplemented()" in one of its methods
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given a custom Python class A and subclasses B, C, and D that all contain a method op() with the same code. Where would be the preferred class to specify the method op() and its implementation?
include op() only in A
include op() in B, C, and D
no preferred location
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given a custom Python class A and its subclasses B, C, and D, where all four classes contain a method op(). How can we ensure that the method op() in class A cannot be executed:
make the method op() in class A abstract
we don't need to do anything in particular
it's not possible to do this
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Given a custom Python class A and this code snippet: myobj1 = A() x = myobj1 + 7 y = 7 + myobj1 We can ensure that the preceding statements succeed by:
implementing the __add__() method
implementing the __radd__() method
no need for extra code
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Queues are useful for the following types of use cases:
scheduling tasks for execution (e.g., processes)
checking if expressions contain balanced parentheses
almost any type of use case involving trees
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Stacks are useful for the following types of use cases:
handling prefix and postfix expressions
checking if expressions contain balanced parentheses
almost any type of use case involving trees
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
A custom Python generator will:
include the yield keyword
be more efficient in terms of memory usage
does not have particular advantages
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