PCEP Module 3

Question 1

==

Answer 1

Returns True if operands’ values are equal, and False otherwise

Question 2

!=

Answer 2

returns True if operands’ values are NOT equal, and False otherwise

Question 3

>

Answer 3

True if the left operand’s value is greater than the right operand’s value, and False otherwise

Question 4

<

Answer 4

True if the left operand’s value is less than the right operand’s value, and False otherwise

Question 5

> =

Answer 5

True if the left operand’s value is greater than or equal to the right operand’s value, and False otherwise

Question 6

<=

Answer 6

True if the left operand’s value is less than or equal to the right operand’s value, and False otherwis

Question 7

if-else

Answer 7

x = 10

if x < 10: # Condition
print(“x is less than 10”) # Executed if the condition is True.

else:
print(“x is greater than or equal to 10”) # Executed if the condition is False.

Question 8

What is the output of…
x = 5
y = 10
z = 8

print(x > y)
print(y > z)

Answer 8

False
True

Question 9

What is the output of…
x = 10

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

Answer 9

True
True
else

Question 10

What is the output of…
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 10

four
five

Question 11

What is the output of…
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 11

one
two

Question 12

While loop infinite loop

Answer 12

while True:
print(“Stuck in an infinite loop.”)

Question 13

While loop “counter”

Answer 13

counter = 5
while counter > 2:
print(counter)
counter -= 1

Question 14

for loop, in elements

Answer 14

word = “Python”
for letter in word:
print(letter, end=”*”)

Question 15

for loop, in range

Answer 15

for i in range(1, 10):
if i % 2 == 0:
print(i)

Question 16

break

Answer 16

stops the loop immediately

Question 17

continue

Answer 17

stops the current iteration of the loop

Question 18

can loops have an “else” clause?

Answer 18

yes

Question 19

range(start, stop, step)

Answer 19

“start” is an optional parameter specifying the starting number of the sequence (0 by default)

“stop” is an optional parameter specifying the end of the sequence generated (it is not included),
and

“step” is an optional parameter specifying the difference between the numbers in the sequence (1 by default.)

Question 20

Output?
for i in range(3):
print(i, end=” “)

Answer 20

0 1 2

Question 21

Output?
for i in range(6, 1, -2):
print(i, end=” “)

Answer 21

6, 4, 2

Question 22

Create a for loop that counts from 0 to 10, and prints odd numbers to the screen. Use the skeleton below:

Answer 22

for i in range(0, 11):
if i % 2 != 0:
print(i)

Question 23

Create a while loop that counts from 0 to 10, and prints odd numbers to the screen:

Answer 23

x = 1
while x < 11:
if x % 2 != 0:
print(x)
x += 1

Question 24

Create a program with a for loop and a break statement. The program should iterate over characters in an email address, exit the loop when it reaches the @ symbol, and print the part before @ on one line.

Answer 24

for ch in “john.smith@pythoninstitute.org”:
if ch == “@”:
break
print(ch, end=””)

Question 25

Create a program with a for loop and a continue statement. The program should iterate over a string of digits, replace each 0 with x, and print the modified string to the screen.

Answer 25

for digit in “0165031806510”:
if digit == “0”:
# Line of code.
# Line of code.
# Line of code.

Question 26

What is the output of the following code?

n = 3

while n > 0:
print(n + 1)
n -= 1
else:
print(n)

Answer 26

4
3
2
0

Question 27

What is the output of the following code?

n = range(4)

for num in n:
print(num - 1)
else:
print(num)

Answer 27

-1
0
1
2
3

Question 28

What is the output of the following code?

for i in range(0, 6, 3):
print(i)

Answer 28

0
3

Question 29

Write a nested list

Answer 29

my_list = [1, ‘a’, [“list”, 64, [0, 1], False]]

Question 30

What is the output of the following snippet?

lst = [1, 2, 3, 4, 5]
lst_2 = []
add = 0

for number in lst:
add += number
lst_2.append(add)

print(lst_2)

Answer 30

[1, 3, 6, 10, 15]

Question 31

Iterate through a list

Answer 31

my_list = [“white”, “purple”, “blue”, “yellow”, “green”]

for color in my_list:
print(color)

Question 32

check the list’s length

Answer 32

my_list = [“white”, “purple”, “blue”, “yellow”, “green”]
print(len(my_list)) # outputs 5

Question 33

bitwise “and”

Answer 33

if both operands are true, the condition is true

Question 34

bitwise “or”

Answer 34

any of the operands are true

Question 35

bitwise “not”

Answer 35

eturns false if the result is true, and returns true if the result is false

Question 36

15 in binary

Answer 36

0000 1111

Question 37

16 in binary

Answer 37

0001 0000

Question 38

y=15
y&raquo_space; 1 = 8 (bitwise right shift)

Answer 38

0000 1000

Question 39

y=15
x=16
x & y = 0
(bitwise and)

Answer 39

0000 0000

Question 40

x=16
˜ x = 240*
(bitwise not)

Answer 40

1111 0000

Question 41

y=15
x=16
x ^ y = 31
(bitwise xor)

Answer 41

0001 1111

Question 42

y=15
y &laquo_space;3 =
(bitwise left shift)

Answer 42

1000 0000

Question 43

What is the output of the following snippet?

x = 4
y = 1

a = x & y
b = x | y
c = ~x # tricky!
d = x ^ 5
e = x&raquo_space; 2
f = x &laquo_space;2

print(a, b, c, d, e, f)

Answer 43

0 5 -5 1 1 16

Question 44

What is the output of the following snippet?

x = 1
y = 0

z = ((x == y) and (x == y)) or not(x == y)
print(not(z))

Answer 44

False

Question 45

FUnction bs Method

Answer 45

A method is owned by the data it works for, while a function is owned by the whole code.