Mod 3

Question 1

What is the output:

2==2.0

Answer 1

True

Question 2

What is the output:
x = 10

if x == 10:
    print(x == 10)
if x > 5:
    print(x > 5)
if x < 10:
    print(x < 10)
else:
    print("else")

Answer 2

True
True
else

Question 3

What is the output:
x = “1”

if x == 1:
    print("one")
elif x == "1":
    if int(x) > 1:
        print("two")
    elif int(x) < 1:
        print("three")
    else:
        print("four")
if int(x) == 1:
    print("five")
else:
    print("six")

Answer 3

four

five

Question 4

x = 1
y = 1.0
z = "1"

if x == y:
    print("one")
if y == int(z):
    print("two")
elif x == y:
    print("three")
else:
    print("four")

Answer 4

one

two

Question 5

What is the output:
for i in range (2, 8, 3):
print(i)

Answer 5

2

5

Question 6

What does break do in a loop?

Answer 6

Exits the loop. The program begins to execute the nearest instruction after the loops body

Question 7

What does continue do in a loop?

Answer 7

Skips the current iteration and continues with the next.

Question 8

What is the output:
print("The break instruction:")
for i in range(1, 6):
    if i == 3:
        break
    print("Inside the loop.", i)
print("Outside the loop.")

Answer 8

The break instruction:
Inside the loop. 1
Inside the loop. 2
Outside the loop.

Question 9

What is the output:
print("The continue instruction:")
for i in range(1, 6):
    if i == 3:
        continue
    print("Inside the loop.", i)
print("Outside the loop.")

Answer 9

The continue instruction:
Inside the loop. 1
Inside the loop. 2
Inside the loop. 4
Inside the loop. 5
Outside the loop.

Question 10

What is the output:
i = 1
while i < 5:
    print(i)
    i += 1
else:
    print("else:", i)

Answer 10

1
2
3
4
else: 5

Question 11

What is the output:
for i in range(5):
    print(i)
else:
    print("else:", i)

Answer 11

0
1
2
3
4
else: 4

Question 12

What type of loop executes a statement or a set of statements as long as a specified boolean condition is true?

Answer 12

while

Question 13

What type of loop executes a set of statements many times, used to iterate over a sequence (often used with the range function)

Answer 13

for

Question 14

In while and for loops the else clause executes after the loop finishes its execution as long as it has not been terminated by ____.

Answer 14

break

Question 15

Provide the range function syntax

Answer 15

range(start, stop, step)

Question 16

What is the output of:
for i in range(5):
print(i, end=” “)

Answer 16

0 1 2 3 4

Question 17

What is the output of:
for i in range(6, 1, -2):
print(i, end=” “)

Answer 17

6, 4, 2

Question 18

What are the Bitwise Operations?

Answer 18

& conjunction (and)
| disjunction (or)
^ exclusive or
~ negation

Question 19

Rules and summary of outputs of bitwise operators

Answer 19

& requires exactly two 1s to provide 1 as the result.
| requires at least one 1 to provide 1 as the result.
^ requires exactly one 1 to provide 1 as the result.
The arguments must be integers (no floats)
They deal with every bit seperately

Question 20

What is the output of:
var = 6
varRight = var >> 1
varLeft = var << 2
print(var, varLeft, varRight)

Answer 20

6 24 3

Question 21

List facts (4):

Answer 21

• Ordered and mutable
• Collection of comma separated items (int, float, string, boolean, etc) in square brackets
• Index starts with 0
• Can be indexed, updated, nested, iterated, sorted, sliced and elements can be deleted

Question 22

How to assign 111 to the 2nd element:

numbers = [10, 5, 7, 2, 1]

Answer 22

numbers[1] = 111

Question 23

How to delete the 2nd element:

numbers = [10, 111, 7, 2, 1]

Answer 23

del numbers[1]

*note cannot access an element that doesnt exist, will cause a runtime error

Question 24

What is the output of:
numbers = [ 10, 7, 2, 1]
print(numbers[-1])
print(numbers[-4])
print(numbers[-5])

Answer 24

1
10
IndexError: list index out of range

Question 25

Function vs Method (3)

Answer 25

- Function owned by the whole code - Method is owned by the data it works for - Method can change the data of a selected entity

Question 26

Use the append method to add a value to the below list and how to show the final list: numbers = [ 10, 7, 2, 1]

Answer 26

numbers.append(111) print(numbers) output: [10, 7, 2, 1, 111]

Question 27

Use the insert method to add a value to the below list in the 4th place position and how to show the final list: numbers = [10, 7, 2, 1, 111]

Answer 27

numbers.insert(3, 54) print(numbers) output: [10, 7, 2, 54, 1, 111]

Question 28

What is the output: lst = [1, [2, 3], 4] print(lst[1]) print(len(lst))

Answer 28

[2, 3] | 3

Question 29

What is the output: lst = [1, 2, 3, 4, 5] lst2 = [] add = 0 for number in lst: add += number lst2.append(add) print(lst2)

Answer 29

[1, 3, 6, 10, 15]

Question 30

``` What is the output: list1 = [1] list2 = list1 list1[0] = 2 print(list2) ```

Answer 30

[2]

Question 31

``` What is the output: list1 = [1] list2 = list1[:] list1[0] = 2 print(list2) ```

Answer 31

[1]

Question 32

``` What is the output: myList = [10, 8, 6, 4, 2] newList = myList[1:3] newList1 = myList[1:-1] newList2 = myList[-1:1] print(newList) print(newList1) print(newList2) ```

Answer 32

[8, 6] [8, 6, 4] []

Question 33

What is the output: myList = [0, 3, 12, 8, 2] print(5 in myList) print(5 not in myList) print(12 in myList)

Answer 33

False True True

Question 34

``` What is the output: myList = [1, 2, 3, 4, 5] sliceOne = myList[2: ] sliceTwo = myList[ :2] sliceThree = myList[-2: ] ``` print(sliceOne) print(sliceTwo) print(sliceThree)

Answer 34

[3, 4, 5] [1, 2] [4, 5]

Question 35

What is the output: 11 = ["A", "B", "C"] 12 = 11 13 = 12 del 11[0] del 12[:] print(13)

Answer 35

[]

Question 36

What is the output: z = ["A", "B", "C"] x = z[:] y = x[:] del z[0] del x[0] print(y)

Answer 36

['A', 'B', 'C']

Question 37

Replace the ??? with in or not in so the appropriate value outputs: myList = [1, 2, "in", True, "ABC"] print(1 ??? myList) # outputs True print("A" ??? myList) # outputs True print(3 ??? myList) # outputs True print(False ??? myList) # outputs False

Answer 37

in not in not in in

Question 38

What does "squares" represent and what is the output: squares = [x ** 2 for x in range(10)] print(squares)

Answer 38

List comprehension | [0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

Question 39

How many columns and how many rows will be in the below array: array = [] for i in range(5): a = ["X" for i in range(4)] array.append(a) print(array)

Answer 39

``` There will be 4 columns and 5 rows. [['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X']] ```

Question 40

``` How do you print this using List Comprehension?: [['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X']] ```

Answer 40

array = [] array = [['X' for i in range(4)] for j in range(5)] print(array)

Question 41

In a 3 x 3 box matrix (9 total boxes), what is the index of the bottommost center box?

Answer 41

[2][1]

Question 42

How many columns, rows and tables is the below matrix made of? b = [[["Y" for r in range(20)] for f in range(15)] for t in range(3)]

Answer 42

20 columns 15 rows 3 tables