Computing

Question 1

name the 4 variable types and the data typ they hold add examples

Answer 1

integer (int): Whole numbers (e.g., 5, -2)

float (float): Decimal numbers (e.g., 3.14, -0.5)

string (str): Strings/text (e.g., “hello”)

Boolean (bool): Boolean values (True, False)

Question 2

name 3 rules for naming variables

Answer 2

Must not start with a digit

No spaces or hyphens

Can include underscores (_)

Question 3

witch variable names are valid and which are not:
-full_name
-1st_place
-my var
-full-name

Answer 3

Correct: full_name

Incorrect: 1st_place, my var, full-name

Question 4

name the 2 types of loops and when they are used

Answer 4

For Loops:
Used when the number of iterations is known

While Loops:
Used when repetitions depend on a condition:

Question 5

use a for loop and write a code that prints out “2, 3, 4, 5, 6”

Answer 5

Outputs: “2, 3, 4, 5, 6”

for i in range(2, 7):
print(i)
# Outputs: 2, 3, 4, 5, 6

Question 6

use a while loop ad write a code that prints out “0, 1, 2”

Answer 6

Outputs: 0, 1, 2

i = 0
while i < 3:
print(i)
i += 1
# Outputs: 0, 1, 2

Question 7

how to define a list

Answer 7

square brackets: (e.g. my_list = [1, 2, 3])

Question 8

what index do list variable start at and so how would you access “2” in the list 1, 2, 3

Answer 8

Index starts at 0
my_list[1]

Question 9

use the append function to add 4 to the list 1, 2, 3

Answer 9

nums = [1,2,3]
print(nums) #output = 1,2,3
nums.append(4) → [1,2,3,4]
print(nums) #output = 1,2,3,4

Question 10

what could you use to find the length of a list

Answer 10

len(nums) gives number of elements

Question 11

what is a function and give an example of it

Answer 11

Function: A block of code that may or may not return a value using return. Functions could take parameters

def add(a, b):
return a + b

result = add(3, 4)
print(result) # Output: 7

Question 12

define procedure and give an example of it

Answer 12

Procedure: A block of code that performs an action but does not return a value. can take parameters

def greet(name):
print(f”Hello, {name}!”)

greet(“Tyme”)

Question 13

define conditions in python and give an example

Answer 13

Conditions are codes that check if something’s true or not, so the program can decide what to do. using if, elif, and else.

age = 18
if age >= 18:
print(“You are an adult.”)
else:
print(“You are a minor.”)

Question 14

what does == and != mean

Answer 14

”==”: equal to
“!= “: not equal to

Question 15

what is a comment for in python and give an example

Answer 15

A comment is a code that Python ignores, it’s for humans to read so they understand the code better

” #this is a comment “

Question 16

what is the ZeroDivisionError in python and give example

Answer 16

def divide(10, 0):
return 10 / 0

divide(10, 0) # Causes ZeroDivisionError

Question 16

what happens if you multiply a string in python

Answer 16

The string repeats that many times.

x = “7”
y = 2
print(x * y) # Output: “77”

Question 16

how do you edit items in a list

Answer 16

a = [10, 20, 30]
for item in a:
print(item + 5)
# output 15, 25, 35

Question 17

how do you find the total of a range of numbers in python

Answer 17

total = 0
for i in range(1, 4):
total += i
print(total) # Output: 6