So, the single item 5 is repeated 3 times. [5] * 3 gives [5, 5, 5]. That is what gets printed.

Answer: [5, 5, 5] Solution: The value of x is [5]. Observe that it is a list with a single item, 5. Now, what is x * 3? How do you multiply a list with a number? The answer is, python repeats the list. So, [5] * 3 is the items in the list [5], repeated 3 times. +

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: 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: 3. 8 Solution: 8.9 has a decimal point, and hence it is considered a float number. Float numbers are python's representation of Real numbers. The int function converts float numbers into integers. The conversion is done by rounding downwards. So, int(8.9) +

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.

Common python mistake: Forgetting to convert user input to int (it remains string by default) The comparisons would be string comparison, which will cause bugs later, so be aware! I hope you found this answer useful.

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 +

Answer: 55 Solution: How does that happen? That's because of data types. Looking closely, it is not 5+5, it is "5"+"5". The difference is that 5 is treated as number, but "5" is treated as a string, consisting of the digit '5'. Addition of strings works differently from +

Answer: false Solution: The condition of the if-block is: 'java' in list Is this True or False? Let us check whether 'java' appears in the list. The list contains 'Java' but not 'java'. Strings are case-sensitive, thus 'Java' and 'java' aren't equal. So, +

But we have False as the index. [1, 2][False] For the purposes of arithmetic and indexing, python treats booleans as integers. True is considered 1, and False as 0. So, [1, 2][False] is equivalent to [1, 2][0] that is, the index0 item, which is 1.

Answer: 1 Solution: Let's first understand what that mess of square bracket means. [1, 2] is a list. Anything that comes after it in square brackets is considered its index. Eg. [1, 2][0] is the index0 item of that list, which is 1. But here we don't have a number index +

Answer: A) 2 Solution: True and False are boolean values. You may be familiar with `or`, `and`, `not` operations on these. It may seem strange to add them with a +. However, python allows that. The way it handles arithmetic on Booleans is simple: True = 1 False = 0 So +

Answer: tho Solution: Recall that negative indexes count from the right side. So, index (-1) refers to the last item, (-2) refers to the second-last item, and so on. Thus, for the string "python", the slice -4:-1 starts at (-4), ie, 4th from right, that is 't' and +