Py4e: Chapter 9 Questions and Answers Already Passed

Py4e: Chapter 9 Questions and Answers Already Passed What does the `get()` method in a dictionary do? A) Deletes a key-value pair B) Updates the value of a key C) Retrieves the value for a specified key D) Checks if a key exists What is the output of `len({"a": 1, "b": 2, "c": 3})`? A) 2 B) 3 C) 4 D) 1 What is the result of `list({"a": 1, "b": 2, "c": 3})`? A) `['a', 'b', 'c', 1, 2, 3]` B) `['a', 'b', 'c']` C) `[1, 2, 3]` 2 D) `[('a', 1), ('b', 2), ('c', 3)]` What will `dict1 = {"a": 1}; dict1["b"] = 2` result in? A) `{"a": 1}` B) `{"b": 2}` C) `{"a": 1, "b": 2}` D) Error What does `("a")` do if `dict1 = {"a": 1, "b": 2}`? A) Removes the key "a" and returns its value B) Removes the key "b" C) Returns `None` D) Deletes the entire dictionary Which of these methods returns all keys from a dictionary? A) `values()` B) `keys()` C) `items()` 3 D) `get()` What is the output of `{"a": 1, "b": 2}.get("c", "Not Found")`? A) None B) KeyError C) "Not Found" D) 0 What does `e({"c": 3})` do if `dict1 = {"a": 1, "b": 2}`? A) Adds a new key "c" with value 3 B) Removes key "a" C) Clears the dictionary D) Replaces the entire dictionary What will `sorted({"c": 3, "a": 1, "b": 2})` return? A) `['c', 'b', 'a']` B) `['a', 'b', 'c']` C) `[1, 2, 3]`