Algorithms
The Python interpreter reads and executes your program________________ instruction(s) at a time.
One
What is the output for the following code when the user enters 5 at the first prompt and 10 and the second prompt?
a = input(“Enter the value of a:”)
b = input(“Enter the value of b:”)
print(a + b)
510
What is the output of the following code if executed?
attendance : bool = True
a : int = 5
words : str = “!”
if attendance:
words = “here” + words
elif not attendance or a > 3:
words = “away”
if -2 < a < -3 ** 2:
words = “I am not” + words
else:
words = “I am” + words
print(words)
I amhere!
whats the output of the following code?
x = 6
while x >= 0:
if x % 2 == 1:
print("ODD")
else:
print("EVEN")
x = x - 3
EVEN
ODD
EVEN
Formally, an algorithm describes a sequence of steps that is:
1)
2)
3)
Executable
Terminating
Unambiguous
What is num3’s type?
num1 : int = 20
num2 : int = 10
num3 : ____ = num1 + num2 / 2
Float
a : str = “COMP 1001”
b : str = “CS”
c : int = 10
if c in a:
if a[0] == b[0]:
print(“Hello”)
if c > int(a[7:]):
print(“World”)
else:
print(“Everyone”)
else:
print(“<(^-^)>”)
Hello
World
What is the output of this code?
x : int = 0
while not (x >= 0):
print("x", end = "")
x += 1
print("!")
!
Which Pokemon do Steph and Cindy have
after the code below is executed?
stephs_pokemon : str = “Bulbasaur”
cindys_pokemon : str = “Pikachu”
stephs_pokemon = cindys_pokemon
cindys_pokemon = stephs_pokemon
Pikachu
Pikachu
What is printed after the following code segment?
words = "CS" + "1001" * len("hi!"[2])
print(words)
CS1001
What is the syntax error in the code bellow
attendance: bool = True
words: str = ""
if attendance == True:
words = "Awesome!"
if not attendance and attendance:
words = "Attend Class!"
else (attendance or (attendance and False)):
words = "Oh my!"
There should be no condition for else
What is the output of the follwing code?
x = 0
for i in range(3):
while x < i:
print("#", end="")
x += 1
print()
[blank line]
#
#
What kind of error is present in the code below?
print("Hello", end = " ")
print("World', end = '!\n')
Second line the ' should be "
Fill-in-the-blank for the formatting to satisfy all of the following:
1) has a width of 5,
2) value is left-aligned, and
3) it prints exactly two decimal places.
*Note: value is a float
print(“result:_______” %value)
print("result:%-5.2f" % value)
What is printed after the following code executes, and why?
from math import sqrt
NUMB : float = 2.0
sqrt_NUMB : float = sqrt(NUMB)
if sqrt_NUMB ** 2 == NUMB:
print(“Obviously this.”)
else:
print(“HOW?!”)
HOW?!
Because sqrt(2) is a irrational number(with no end in their floating digits) and in computer we can save an estimation of it
How many times is c printed after the given code executes?
for i in range(10):
x = i
while x > 0:
print("c", end="")
x = x - 3
print()
18
What is printed after the code below executes?
num1 : int = 20
num2 : int = 10
string1 : str = “hello”
num3 : int = num1 + num2 / 2
num4 : int = num3 + 10 % len(string1[1:5:2])
print(num4)
25.0
Below is incorrect code for maximum value of integers a, b, c.
Give a counterexample to show the code is incorrect.
In other words…give specific values for a, b, and c that give the wrong answer.
max_value : int = a
if b > a and b > c:
max_value = b
elif c > a and c > b:
max_value = c
a = 4
b = 5
c = 5
What is printed after the given code executes?
for i in range(-1, 2):
x = -2
while x < i:
if x % 2 == i % 2:
print("x", end="")
else:
print("o", end="")
x += 1
print()
o
xo
oxo