Python 3

Question 1

What are the four rules to naming variables?

Answer 1

1. Variables are case sensitive.
2. Variable names must be one word.
3. Variable names may be letters, numbers, or underscore.
4. Variable names cannot begin with a number.

Question 2

Variables should begin with a ________ word, and multiple words should be separated with _________s.

Answer 2

lowercase , underscore

Question 3

How do you assign an integer to a variable?

Answer 3

variable = integer
x = 100

Question 4

How do you assign a string to a variable?

Answer 4

variable = 'string'
x = 'wes'

Question 5

How do you print a variable?

Answer 5

print(variable)

print(x)

Question 6

How do you assign multiple values to the same value?

Answer 6

variable1 = variable2 = variable3 = integer
x = y = z = 0
x = y = z = 'wes'

Question 7

How do you assign values to several different variables within the same line?

Answer 7

variable1, variable2, variable3 = value1, value2, value3

x, y, z = 1, ‘two’, 3

Question 8

What is a global variable?

Answer 8

A global variable exists outside a function.

Question 9

What is a function?

Answer 9

A function is a block of instructions that performs an action and, once defined, can be reused. Functions make code more modular, allowing you to use the same code over and over again.

Question 10

What is a local variable?

Answer 10

A local variable exists within a function.

Question 11

What is the python function to return an absolute value?

Answer 11

abs ( )

Question 12

What are the five python data types?

Answer 12

1. Numbers
2. String
3. List
4. Tuple
5. Dictionary

Question 13

What are the three python numerical types?

Answer 13

1. Integer
2. Float
3. Complex

Question 14

What is the code to print the first letter in a string?

Answer 14

print(stringname[0])

Question 15

What is a list?

Answer 15

A list contains items separated by columns and enclosed with brackets.

Question 16

What is the code to create a list?

Answer 16

list = [1,2,4,’four’,5]

Question 17

What is the code to print the 2 through 4th items in a list?If

Answer 17

print(list[1:4])

Question 18

What is a tuple?

Answer 18

A tuple is a list of numbers separated by comma’s and enclosed in parenthesis.

Question 19

What is the code to create a tuple?

Answer 19

tuple = (1,2,3, ‘four,5)

Question 20

What is the major difference between a tuple and a string?

Answer 20

Tuple items cannot be changed, they are read only.

Question 21

What are the 7 arithmetic operators supported by python?

Answer 21

1. addition +
2. Multiplication *
3. Subtraction -
4. Division /
5. modulus %
6. Exponent **
7. Floor //

Question 22

What is floor division?

Answer 22

The division of operands where the result is the quotient with any numbers after the decimal dropped. If one of the operands is negative then the result will be negative.

Question 23

What are the 6 python comparison operators?

Answer 23

1. If the value of two operands is equal then the condition becomes true. ==
2. If the value of two operands are not equal, then the condition becomes true. !=
3. If the value of the left operand is greater than the right operand then the condition becomes true. >
4. If the value of the right operand is great than the left operand then the condition becomes true. <
5. If the value of the left operand is greater than or equal to the right then the condition becomes true. >=
6. If the value of the right operand is greater then or equal to the left operand then the condition becomes true. <=

Question 24

What are the three python decision making statements?

Answer 24

1. If statement
2. If…else statement
3. Nested if statement.

Question 25

What is the code for a single if statement?

Answer 25

if variable == 1:

print(‘True’)

Question 26

What is the code for a if… else statement?

Answer 26

if variable == 1:
print(‘True’)
Else:
print(‘False’)