Python PCEP Flashcard #2

Front

What is a List in Python?

Back

A List is a data type in Python that is used to store multiple items in a single variable. Lists are ordered, changeable, and allow duplicate values. Example: x = [1, 2, 3]

Front

What is the output of the following code: numbers = [5, 14, 9, 17]; for number in numbers: if number % 3 == 0: print(number)?

Back

The output will be 9, as it is the only number in the list that is divisible by 3.

Front

What does the expression 'number > 7' evaluate to if number is 10?

Back

The expression evaluates to True, as 10 is greater than 7.

Front

What symbol is used in Python to assign values to a variable?

Back

The equals sign '=' is used to assign values to a variable in Python.

Front

What is a Dictionary in Python?

Back

A Dictionary is a data type in Python that stores data in key-value pairs. Example: x = {'a': 1, 'b': 2}.

Front

What is a Tuple in Python?

Back

A Tuple is a data type in Python that is similar to a list but is immutable (cannot be changed). Example: x = (1, 2, 3).

Front

What is the difference between a List and a Tuple?

Back

The main difference is that Lists are mutable (can be changed) while Tuples are immutable (cannot be changed).

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What is the output of the following code: x = [1, 2, 3]; print(x[1])?

Back

The output will be 2, as it is the item at index 1 in the list.

Front

What is the purpose of the 'for' loop in Python?

Back

The 'for' loop is used to iterate over a sequence (like a list or a string) and execute a block of code for each item in the sequence.

Front

What does the 'len()' function do in Python?

Back

The 'len()' function returns the number of items in an object, such as a list or a string.