CodeHS - Intro to Python - Basics and Console Interaction

What is the difference between a binary operator and a unary operator?

• A computer can use binary operators, but it cannot use unary operators.

• A unary operator needs two things, while a binary operator only needs one.

• A binary operator needs two things, while a unary operator only needs one.

• Binary operators are used for arithmetic expressions, while unary operators are for strings.

On which line of code will Python error?

weight = input("How much do you weigh? ")

oz_water = weight / 2

print "You should drink " + str(oz_water)

print "ounces of water every day if you weigh " + weight

• Line 1

• Line 2

• Line 3

• Line 4

In what order should these statements be executed in order to get input from the user and print out the result?

A) response = input("Do you like cheese? ")

B) print "You have chosen " + confirm

C) print "You responded " + response

D) confirm = input("Are you sure? ")

• A, B, C, D

• B, C, A, D

• A, C, D, B

• C, B, A, D

What is the output of the following program? Assume the user enters “Florence”, then “Fernandez”.

first_name = input("What is your first name? ")

last_name = input("What is your last name? ")

whole_name = first_name + last_name

print whole_name

• Fernandez Florence

• Florence

  Fernandez

• FlorenceFernandez

• Florence Fernandez

Which of the following statements is true about print statements?

I. In order to print a string literal, the string must be enclosed in quotes.

II. Each print statement will be printed on its own line.

III. Print statements will not let you print strings and numbers in the same statement.

IV. Print statements are how you display text on the screen.

• I, IV

• II, III

• I, II, IV

• I, III, IV

Which of the following choices is a properly formed Python variable name, meaning it is both legal in the Python language and considered good style?

• user_age

• uSeRaGe

• user!age!

• 1user_age

Which of the following choices is NOT a Python variable type?

• int

• str

• float

• number

Choose the correct declaration of a float variable with the value 3.14.

• pi = “3.14”

• pi = int(3.14)

• pi = 3.14

• float pi = 3.14

What is the final result of the expression 4 + 5 * 3?

• 27

• 12

• 21

• 19

What is the final result of the expression 7 / 3 + 6?

• 0

• 8.33333333333

• 8

• 0.777777777778