Exploring Python Data Structures Flashcard

Front

Which of the following is a mutable data structure in Python? Options: tuple, list, string, frozenset

Back

list

Front

What is the primary characteristic of a stack data structure?

Back

Last-In-First-Out

Front

Which Python module provides the `PriorityQueue` class?

Back

queue

Front

Which method is used to remove an item from the front of a queue in Python’s `queue.Queue`?

Back

get()

Front

Which operation adds an element to the top of a stack?

Back

push

Front

Which of the following is NOT a valid operation on a queue? enqueue, dequeue, push, peek

Back

push

Front

What is the main property of a priority queue?

Back

Each element has a priority, and the element with the highest priority is served first

Front

Given a 2D array `arr`, which code retrieves the element in the second row and third column? Options: arr[1,2], arr[2,3], arr[3,2], arr[2][3]

Back

arr[2][3]

Front

Suppose you have a stack implemented as a Python list: `stack = [1, 2, 3]`. Which code removes the top element?

Back

stack.pop()

Front

What will this return if arr is a 2D array?
[row[0] for row in arr]

Back

First column