Python Data Types and Variables Quiz

What will be the output of the following code? print(1+1)

What will be the output of the following code? print(str(1)+str(1))

What will be the output of the following code? print("Hello"*2)

What does the following code print? foo = 20 bar = foo*2 print (bar)

Is this code equivalent to the code above? foo = 20 print (foo*2)

Is there anything wrong with this code? foo = 20 print(int(foo)*2)

Is there anything wrong with the code below? Will it run? Will the answer be logically correct? # double the user's input myInput = input("Please input a number here: ") print (myInput*2)

What is the output of the following code? a = 25 b = False if (a < 25) or (not b): b = not b elif (a >= 25) and b: a /= 5 else: a += 7 b = False print(f"{a}: {b}")

Are the following two functions ______?

What is the difference between the two functions below? def baz(x): return 2*x def qux(x): print(2*x)

Using the same function definitions as above, identify the problem in the following code. Will it run? Will the results be what you expect? Why or why not? a = baz (3) b = qux (3) print(a) print(b)

Identify the problem in the following piece of code. def myFunc(x): int(input("Input any number.")) x = if x > 10: return True return False

Write a function that takes a numeric value x (int), as well as an integer n, and uses a looping structure to return the exponent x^n.

Write a function that takes a list as an argument to find the sum of all elements in the list using a looping structure.

Write a function that takes a list as an argument and returns a new list that removes all duplicates in the list.

Trace through the code manually to predict what will happen when the code is executed. Then, convert the code snippet into Python code to verify your answers. a = [] for i in range(50): a.append(i) print(a)

What is the output of the code snippet for i in range(5): a.pop(i) print(f"after pop", a)

What is the output of the code snippet for i in range(5): a.remove(a[i]) print(f"after remove a[i]", a)

What is the output of the code snippet b=a[:] for i in range(5): a.remove(b[i]) print(f"after remove b[i]",a)

Write a function that returns a N-by-N 2-D list of randomly generated numbers between 0 and 100. Take n as an argument to your function.

Then, write a function to print this 2-D list, line by line, as a string. The function must be counter-controlled. The functions must take two arguments: grid (your 2-D list) and n (the size of your list.)

Consider the following code: myDict = {} for i in range (1,5): myDict[i] = i*2 for key in myDict: print(f"{key}: {myDict[key]}") Bob says: I believe this code will print out "1:2, 2:4, 3:6, 4:8, 5:10", in that order, all on new lines. However, Alice disagrees. Who is correct? If Alice is correct, what are the reasons Bob is wrong?

Assume that the userCart variable is a list of strings representing the items in the user's cart. For example, ["banana", "apple", "bacon", "apple"] is a valid shopping cart. Write a function, receipt(userCart), to calculate the total cost of a user's cart and print a nicely formatted receipt.

We will calculate the sum of a list of numbers recursively. However, we will trace the steps to solve this by hand. You may also implement the code if you wish. Complete the following trace: sum([5,6,2,8,9])

Now, we will do the same for the product of a list of numbers. prod([10,9,6,4,2]) # Complete this line as well

We define n!=n*(n-1)(n-2)...21. 1. What is the base case? 2. What is the recursive case? 3. Write the code to define the recursive function fact(n).

What will happen when this function is run? def myFunc(x): return x + myFunc(x-1)

What will happen when this function is run? def myFunc(x): if x == 0: return x print(myFunc(x-1))

What will each line of the following code print? print(1+1)

What will each line of the following code print? print(str(1)+str(1))

What will each line of the following code print? print("Hello"*2)

Are the following two functions equivalent? def foo(x): myVar = 2*x return myVar def bar(x): return 2*x