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PCAP > Mod 3 > Flashcards

Mod 3 Flashcards

1
Q

What is the output:

2==2.0

A

True

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2
Q

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")
A

True
True
else

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3
Q

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")
A

four

five

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4
Q 
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")
A

one

two

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5
Q

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

A

2

5

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6
Q

What does break do in a loop?

A

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

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7
Q

What does continue do in a loop?

A

Skips the current iteration and continues with the next.

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8
Q 
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.")
A

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

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9
Q 
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.")
A 
The continue instruction:
Inside the loop. 1
Inside the loop. 2
Inside the loop. 4
Inside the loop. 5
Outside the loop.
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10
Q 
What is the output:
i = 1
while i < 5:
    print(i)
    i += 1
else:
    print("else:", i)
A 
1
2
3
4
else: 5
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11
Q 
What is the output:
for i in range(5):
    print(i)
else:
    print("else:", i)
A 
0
1
2
3
4
else: 4
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12
Q

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

A

while

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13
Q

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

A

for

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14
Q

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

A

break

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15
Q

Provide the range function syntax

A

range(start, stop, step)

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16
Q

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

A

0 1 2 3 4

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17
Q

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

A

6, 4, 2

18
Q

What are the Bitwise Operations?

A

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

19
Q

Rules and summary of outputs of bitwise operators

A

& 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

20
Q 
What is the output of:
var = 6
varRight = var >> 1
varLeft = var << 2
print(var, varLeft, varRight)
A

6 24 3

21
Q

List facts (4):

A
  • 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
22
Q

How to assign 111 to the 2nd element:

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

A

numbers[1] = 111

23
Q

How to delete the 2nd element:

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

A

del numbers[1]

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

24
Q 
What is the output of:
numbers = [ 10, 7, 2, 1]
print(numbers[-1])
print(numbers[-4])
print(numbers[-5])
A

1
10
IndexError: list index out of range

25
Q

Function vs Method (3)

A
  • Function owned by the whole code
  • Method is owned by the data it works for
  • Method can change the data of a selected entity
26
Q

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

A

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

27
Q

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]

A

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

28
Q

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

A

[2, 3]

3

29
Q

What is the output:
lst = [1, 2, 3, 4, 5]
lst2 = []
add = 0

for number in lst:
add += number
lst2.append(add)

print(lst2)

A

[1, 3, 6, 10, 15]

30
Q 
What is the output:
list1 = [1]
list2 = list1
list1[0] = 2
print(list2)
A

[2]

31
Q 
What is the output:
list1 = [1]
list2 = list1[:]
list1[0] = 2
print(list2)
A

[1]

32
Q 
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)
A

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

33
Q

What is the output:
myList = [0, 3, 12, 8, 2]

print(5 in myList)
print(5 not in myList)
print(12 in myList)

A

False
True
True

34
Q 
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)

A

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

35
Q

What is the output:
11 = [“A”, “B”, “C”]
12 = 11
13 = 12

del 11[0]
del 12[:]

print(13)

A

[]

36
Q

What is the output:
z = [“A”, “B”, “C”]
x = z[:]
y = x[:]

del z[0]
del x[0]

print(y)

A

[‘A’, ‘B’, ‘C’]

37
Q

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

A

in
not in
not in
in

38
Q

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

A

List comprehension

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

39
Q

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)

A 
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']]
40
Q 
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']]
A

array = []

array = [[‘X’ for i in range(4)] for j in range(5)]

print(array)

41
Q

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

A

[2][1]

42
Q

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)]

A

20 columns
15 rows
3 tables

PCAP (6 decks)

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