Answer: True Solution: {1, 2} and {2, 1} are sets. In sets, the order of the elements doesn't matter. A set is like a bag with fruits, shuffled. There is no "first" or "second". The only meaningful question is, "Is this item in the bag or not?" {1, 2} has two items: 1, 2 +

Answer: 3 Solution: The // symbol stands for "floor division". How is that different from the usual / division? / gives you an exact division as a float. // gives the quotient rounded down. Eg. 10 / 3 would be 3.333 10 // 3 is that rounded down to the lower int, ie, 3.

Answer: break Solution: When python encounters the break keyword, it exits the currently running loop. The break statement works for both while and for loops.

Answer: 0 2 4 (on separate lines) Solution: The for-loop lets you run the same code multiple times with different values. Let's start by understanding range(3) this produces a sequence of numbers: 0, 1, and 2. In each iteration of the for-loop, +

Answer: B Solution: x and y are sets. What does the `-` do on sets? It computes the "set difference". The diagram makes it clear (credit in description): The shaded region is the part of A which is not in B. That is the set difference. +

Answer: A Solution: a and b are sets. The code computes a ^ b What is this operator ^? The operator's action is called Symmetric Difference. The diagram shows it the symmetric difference of A and B as shaded: +

Answer: A. HelloWorld Solution: "Hello" + "World" Here is an addition of two strings. As we know, strings are sequences of characters. How do you add two of these? The answer is that the + operator does different things for different types. Numbers get summed up. But, +

Answer: 6 Solution: sum() produces the sum of the items of this list. Here it is 3+6+9=18 len() produces the length of the list. Here it is 3 because there are 3 items. The // gets the floor division (division that gives integer result by ignoring the remainder) 18//3 = 6

Answer: A. Pn Solution: x is a string "Python" x[0] gets the leftmost character, 'P'. x[-1] has a negative index. It gets the rightmost character, 'n'. When you sum these two, the characters get joined. x[0]+x[-1] is the same as 'P' + 'n' ie, 'Pn'. So, Pn gets printed.

Answer: B. False Solution: This is easy to get wrong! "10" > "2" looks like a comparison of numbers, but look carefully. "10" and "2" are strings. They are treated as sequences of characters. How do you compare sequences of characters? We do that by comparing +