Quiz on Sequences and Comprehensions in Python

What are the primary sequence types in Python?

• Dictionaries, Lists, and Arrays

• Sets, Tuples, and Strings

• Arrays, Lists, and Dictionaries

• Lists, Tuples, and Strings

Which operation is used to access elements using their position in a sequence?

• Membership Testing

• Concatenation

• Slicing

• Indexing

What does the append() method do in a list?

• Duplicates the list

• Sorts the list in ascending order

• Adds an element to the end of the list

• Removes an element from the list

What is the syntax for list comprehensions in Python?

• {item: expression for item in iterable}

• [item for item in iterable]

• {key_expression: value_expression for item in iterable if condition}

• [expression for item in iterable if condition]

Which of the following is true about tuples in Python?

• They are mutable and can be changed.

• They can hold a variety of object types.

• They are only used for strings.

• They are mutable sequences.

What does the count() method do for tuples?

• Adds an element to the tuple

• Sorts the tuple in ascending order

• Removes the first occurrence of a specified value

• Returns the number of occurrences of a value

Which comprehension type is used to create dictionaries?

• Set Comprehensions

• List Comprehensions

• Dictionary Comprehensions

• Tuple Comprehensions

What is the result of the expression [x**2 for x in range(10) if x%2==0]?

• A list of squares of odd numbers

• A list of squares of even numbers

• A set of squares of even numbers

• A dictionary of numbers and their squares

Which method converts all characters in a string to uppercase?

• upper()

• join()

• split()

• lower()

What is the purpose of membership testing in sequences?

• To duplicate a sequence

• To concatenate two sequences

• To sort the elements of a sequence

• To check if an element exists in a sequence