CS Exam 1 Study Guide
Formatting with %s Fill in the blanks below so that the code will print, 'Roses are red, violets are blue'. var1 = "blue" var2 = "Roses" var3 = "red" phrase = "___ are ___, violets are ___." % (_____, _____, _____) print(phrase)
%s, %s, %s, var2, var3, var1
Identify the operators that match the given description ___ is the operator for multiplication ___ is the operator for modulo ___ is the operator for floor division (returns an integer)
* % //
Fill in the blanks below so that the loop outputs the following: 0 2 4 6 8 for i in range(__, __, __): print(i)
0, 10, 2
Select all of the statements that are true about the in operator and strings. Hint, there are more than one correct answer. 1) 'in' returns a boolean value 2) 'in' returns an index when a word is present in a string 3) 'in' will return False if a word is found in a string but one is lowercase and the other is uppercase 4) 'in' will return True if a word is found in a string even if one is lowercase and the other is uppercase
1 & 2
Select all of reasons why you would want to use the remove method. Hint, there are more than one correct answer. 1) You want to remove an element from a list 2) You want to have access to the element that was removed from the list 3) You want to remove an element by its value, not its index
1 & 3
Select all of the compound conditionals that are correctly written. Hint, there is more than one right answer. 1) if True and False: 2) if False not True: 3) if not False or True: 4) if True, True:
1 & 3
Select all of the print statements below that will produce the following output: I am the first line, I am the second, and I am the third line! Hint, there are more than one correct answer. 1) print("I am the first line,\nI am the second,\nand I am the third line!") 2) print("I am the first line, I am the second, and I am the third line!") 3) print("""I am the first line, I am the second, and I am the third line!""") 4) print("I am the first line, \ I am the second, \ and I am the third line!")
1 & 3
Select all of the statements that are true about the sort method. Hint, there are more than one correct answer. 1) The sort method can sort lists in ascending and descending order 2) The sort method returns a new list 3) Uppercase letter come before lowercase letters when sorting a list of strings 4) The sort method can sort a list with mixed datatypes (i.e. floats, ints, strings, etc.)
1 & 3
Which of the following conditions would cause the expression a <= b to equate to true? Hint: there is more than one correct answer. 1) If a is less than b 2) If a is greater than b 3) If a is equal to b 4) If a is not equal to b
1 & 3
Select all of the statements below that are true with regards to if statements. Hint, there is more than one correct answer. 1) If statements only ask if a boolean expression is true. 2) If statements will perform a set of actions if the boolean expression is false. 3) If statements provide the most precision of all the conditional statements. 4) If statements are the simplest of all the conditionals.
1 & 4
Select all of the statements below that are true. 1) 19 >= 19 2) 18.9 >= 19 3) -19 >= 19 4) 19 >= 9
1 & 4
Select all of the ways to make a contraction (It's) inside a string declaration. Hint, there are more than one correct response. 1) my_string = "It's my birthday today!" 2) my_string = 'It's my birthday today!' 3) my_string = "It/'s my birthday today!" 4) my_string = 'It\'s my birthday today!'
1 & 4
Why would you want to use a compound conditional? Hint, there is more than one right answer. 1) If two or more thing have to be true. 2) When you want your code to be faster. 3) You will get an error message if you don't use a compound conditional. 4) When you want your code to be more concise and easy to read.
1 & 4
Assume the following code: my_string = '''The \ cat \ jumped \ over \ the \ hat """ What changes should be made so the end result is proper Python code for a string that prints on a single line of output? Select all that apply. 1) Use \ but not triple-quotes 2) You should have 79 characters before going to the next line 3) The triple quoted strings must match 4) Use \n instead of \ for multiline strings
1, 2, & 3
Which of the following are recommended ways you should perform string interpolation in Python 3? Hint, there is more than one correct answer. 1) Using + or commas 2) Using % 3) Using the format method 4) Using f-strings
1, 2, & 4
Select all of the data types that can be passed to a function as a parameter. Note, there is more than one correct answer. 1) Numbers (floats or ints) 2) Strings 3) Booleans 4) Lists of strings, numbers, or booleans
1, 2, 3, & 4
What are the requirements of using an else statement? Hint, there is more than one right answer. 1) There is no indentation 2) Use a : at the end 3) Do not use another boolean expression 4) Code after the else must be indented
1, 2, 3, & 4
Which of the following things must you do manually when iterating over a list with a while loop? Hint, there is more than one right answer. 1) Create a variable for the length of the list. 2) Create a variable for the index. 3) Reference a list element with the list name and index. 4) Increment the index variable.
1, 2, 3, & 4
Click on all of the data types that work with the max functions. Hint, there are more than one correct answer. 1) When the list is composed of only strings. 2) When the list is composed of numbers and strings. 3) When the list is composed of floats and ints. 4) When the list is composed of just ints.
1, 3, & 4
Select all of the correct ways a string can be declared. Hint, there is more than one correct answer. 1) my_string = "I am a string" 2) my_string = "I am a string' 3) my_string = '"I am a string"' 4) my_string = 'I am a string'
1, 3, & 4
What are the rules for variable names in Python? Hint, there are more than one correct answer. 1) You cannot use a keyword 2) You must use capital letters 3) The variable name must start with a letter or an underscore 4) Variable names must be a noun 5) The rest of the variable name can only be letters, numbers, or an underscore
1, 3, & 5
Complete the code below such that the second element becomes 7. my_list[1, 2, 3, 4] my_list[__] = __
1, 7
The code below should produce the output 'I love string concatenation!'. a = "I love" b = ??? c = ??? print(c) Select the correct declarations for variables b and c. Hint, there are two answers for this question. 1) c = b + a 2) b = " string concatenation!" 3) c = a + b 4) b = "string concatenation"
2 & 3
What is wrong with the code below? Hint, there is more than one right answer. if 3 > 4 print("This is true") else print("This is false") 1) There needs to be parentheses around the boolean expression 2) There needs to be a : after the if statement and the else 3) The print statements need to be indented 4) There needs to be a variable in the boolean expression
2 & 3
Which of the following code snippets will loop through all number between 0 and 100 (including 100)? 1) range(100) 2) range(101) 3) range(0, 100) 4) range(0, 101, 1)
2 & 4
Fill in the blanks below so that the string "brown" will become the fourth element of the list colors. colors.insert(____, ____)
3, "brown"
Enter the appropriate operator for each definition. This operator checks if two values are equal - ____ This operator assigns a value to a variable - ____ This operator checks if two values are not equal - ____
== = !=
How do you tell Python that your function declaration is done? A) Remove the indentation B) Use the } character C) Use the end keyword D) Use the ) character
A
Use the code below to help you answer the following question. The program should print the phrase: May it be more humane and fair than the world your governments have made before. var1 = "governments" var2 = "fair" var3 = "humane" A) print("May it be more {} and {} than the world your {} have made before.".format(var3, var2, var1)) B) print("May it be more {2} and {1} than the world your {0} have made before.".format(var3, var2, var1)) C) print("May it be more {var3} and {var1} than the world your {var2} have made before.") D) print("May it be more {} and {} than the world your {} have made before.".format(var1, var2, var3))
A
What are the four basic data types of Python? A) strings, boolean, ints, and floats B) strings, true/false, numbers, decimals C) boolean, hexadecimal, ints, strings D) numbers, images, audio, video
A
What does the return keyword do? A) Returns a value calculated by a function back to the program. B) Prints a value to the screen. C) The return keyword must be used to terminate a function. D) The return keyword is only used with ints and floats. Other values cannot be used with return.
A
What is the relationship of the length of a list and the value of its last index? A) The length of a list is always 1 greater than the value of the last index. B) The value of the length is equal to the value of the last index. C) The value of the last index is 1 greater than the length.
A
Which statement below will print Hi! without a newline character? A) print("Hi!", end='') B) print("Hi!", end=N/A) C) print("Hi!", stop='') D) print("Hi!")
A
What is the difference between a 'float' and an 'int'?
A float is a decimal number, while an int is a whole number
Complete the line of code below so that variable declaration is correct. my_string = "This is a string
Add " to the end
Select the line of code that would raise 7 to the power of 4. A) 7 * 4 B) 7 ** 4 C) 7 ^ 4 D) 4 ** 7
B
Select the properly formatted integer from the list below. A) '20000' B) 20000 C) 20,000 D) 020000
B
Use the code below to help you answer the following question: my_string = "Calvin and Hobbes" my_slice = my_string[3:8] What is the value of my_slice? A) "vin an" B) "vin a" C) "lvin " D) "lvin a"
B
Using the list below, select the code snippet that references the third element in the array. my_list = [1, 2, 3, 4, 5] A) my_list[3] B) my_list[2] C) 3 D) my_list[third]
B
What does an if statement not do? A) Evaluates a boolean expression. B) Evaluates code when the boolean expression is false. C) Allows your program to make decisions about what to do. D) Determines if something is True or False.
B
What does it mean that a string is immutable? A) You cannot assign a variable a new string value B) You cannot modify characters in a string C) You can change the individual characters in a string D) You can assign a variable a new string value
B
What does the term string interpolation mean? A) Converting a variable to the type string B) Inserting the value of variables into a string C) Printing a string D) Assigning a string value to a variable
B
Which of the following code snippets is the correct way to append red to the list colors? A) my_list.append("red") B) colors.append("red") C) colors[append("red")] D) colors,append("red")
B
Which of the following items is a correct variable name? A) my-variable B) _my_variable C) 1_my_variable D) my_variable!
B
Which of the following lines of code is not an example of type casting? A) int(a) B) string(a) C) float(a) D) bool(a)
B
Which of the following statements about division in Python is FALSE? A) You can divide a number by True. B) The / operator sometimes returns an integer. C) You are not allowed to divide by 0. D) The // operator always returns a whole number.
B
Given the variables below, determine which print statement would return False. a = True or False b = False and True c = False and False A) print(not c and b or a) B) print(a and b and c or True) C) print(not b and not a or not not c) D) print(a or c and not b)
C
Rewrite the code below using the -= operator. a = 42 b = 17 a = a - b A) a = a - b B) a =- b C) a -= b D) a += b
C
What data types are used with the list concatenation operator (+)? A) The list concatenation operator requires a list and a string. B) The list concatenation operator requires a list and a number. C) The list concatenation operator requires two lists. D) The list concatenation operator requires a list and a boolean.
C
What does the print statement do? A) Sends your output to the printer B) Sends your output to a file C) Sends your output to the screen D) Sends your output to the compiler
C
What happens when you add an int and a float? A) You get a syntax error B) You get an int C) You get a float
C
What is a compound conditional? A) Two conditional statements but with only the and operator. B) Two if statements, one after the other. C) A conditional that has two or more boolean expressions. D) Two conditional statements but with only the or operator.
C
What is the difference between defining a function and calling a function? A) Calling a function tells Python what actions the function will perform. Defining a function tells Python to perform those actions. B) Defining a function creates a class, while calling a function creates a method. C) Defining a function tells Python what actions the function will perform. Calling a function tells Python to perform those actions. D) Defining a function and calling a function are interchangeable terms.
C
What is the rule regarding boolean values in Python? A) Boolean values are case sensitive and must be lowercase. B) Boolean values are not case sensitive and can be either uppercase or lowercase. C) Boolean values are case sensitive and must be uppercase. D) Boolean values are case sensitive and must be all caps.
C
What is wrong with the code snippet below? print(Hello world) A) Capitalize print B) Use { } instead of ( ) C) Missing " " around Hello world D) Add a ; at the end of the line of code
C
Which definition best describes a nested loop? A) A nested loop is when you have two loops, one after the other. B) A nested loop is when you have a while loop and a for loop in the same program. C) A nested loop is when a loop is inside another loop. D) A nested loop is when you have more than one loop in your program.
C
Which of the following elif statements is correct? A) elif: B) else if a < 10: C) elif a < 10: D) elif a < 10
C
Which of the following operators cannot be used with strings? A) + B) * C) /
C
Which operation should be performed first in the following expression? 7 / 2 + (5 % 2 * 5) ** 2 - 3 A) 5 % 2 * 5 B) 7 / 2 C) 5 % 2 D) 5 ** 2
C
Why does the program above use the append method instead of the concatenate operator (+) when adding a number to either the odd or even lists? A) You cannot concatenate lists B) Either append or + would work C) Because you need two lists in order to concatenate D) Because append comes first alphabetically
C
What does the 'in' operator do for lists?
Checks if the value is in the list, returns a boolean.
Select the code snippet that correctly declares the variable my_list as a list with the elements 1, 2, and 3. A) my_list = (1, 2, 3) B) my_list = {1, 2, 3} C) my_list = [1 2 3] D) my_list = [1, 2, 3]
D
Select the line of code below that increments the variable a by 1. A) a++ B) a = 1 C) a -= 1 D) a = a + 1
D
Select the line of code below that prints the product of the variables a and b. A) print(ab) B) print(a * c) C) print(a x b) D) print(a * b)
D
What are the values of a and b such that the following expression is true? a * 3 + b - 8 / 2 = 17.0 Use the code editor to help you find the right answer. A) a = 10 and b = 1 B) a = 4 and b = "9" C) a = 9 and b = 4 D) a = 4 and b = 9
D
What does modulo do? A) Determines if a number is even or odd B) Is another name for division C) Determines the percentage of two numbers D) Returns the remainder after division is performed
D
What purpose does the break statement serve? A) The break statement is used to let your code take a short pause. B) The break statement is required for every while loop. C) The break statement is used to begin a loop. D) The break statement is used to exit a loop.
D
Which one of the for loop below will run 10 times? A) for i in range(9): B) for i in range(0, 10, 2): C) for i in range(1, 10): D) for i in range(10):
D
True or False: the two names refer to the same variable. My_Variable my_variable
False
Using your knowledge of boolean operators and order of operations, determine the result of the code below. 5 ** 2 > (8 / 2) ** 2 and 10 % 4 > 3 True or False
False
What is the result of the following expression? not (5 != 3) and (5 % 3 >= 2)
False
Fill in the blanks for the following two statements. For an 'or' statement to be false, all of the boolean expressions must be _______. For an 'or' statement to be true, only one of the boolean expressions needs to be ______.
False True
What is the order of operations
PEMDAS (Parentheses Exponents Multiplication/Division(modulo) Addition/Subtraction)
Looking at the expression below, identify the order of operations. (1 + 2) * 4 ** 2 - 10 Step 1: Step 2: Step 3: Step 4:
Step 1: 1 + 2 Step 2: 4 ** 2 Step 3: 3 * 16 Step 4: 48 - 10
Determine if the code below returns true or false. (7 >= 7) and (True or 99 < 1) or not (3 > 5 and 7 < 10) and 2 != 4 True or False
True
True or False: Python automatically inserts a newline character when you use the print command.
True
Fill in the blanks for the following two statements. For an 'and' statement to be true, all of the boolean expressions must be _______. For an 'and' statement to be false, only one of the boolean expressions needs to be ______.
True False
Evaluate the two expressions below. 5 != 4 returns ______ not 5 == 4 returns ______
True True
Answer the following questions about strings by filling in the blanks. Strings are composed of a sequence of ___________. All strings have a ___________. Individual characters are referenced with an ___________.
characters length index
Fill in the blanks of the passage below. Use the information above to help find the correct answers. A series of elif statements can be more efficient that a series of if statements because the ______ statements will ______ as soon as there is a ______ boolean expression. The ______ statement, however, will keep going even if there is a ______ boolean expression.
elif stop true if true
Fill in the blanks below to create a program that prints, Calvin and Hobbes. var1 = "Hobbes" var2 = "Calvin" phrase = ___"{____} and {____}" print(phrase)
f, var2, var1
Create a compound conditional that prints Hello World
if True or True: print("Hello World")
if x > 5: if x < 20: print(x) Convert the code above into a compound conditional.
if x > 5 and x < 20: print(x)
Complete the if statement below so that it will determine if the variable num is greater than 100. Note, do not use parentheses when constructing the conditional. __ num > 100__ print("num is greater than 100")
if, :
Fill in the blanks below about comments in Python. In Python, the # symbol means a _________ comment, and the ''' symbol means a ________ comment.
single-line multi-line
'or' Operator When using the or operator, Python checks to see if the first boolean expression is ______. If it is ______, Python returns ______ and ignores the second boolean expression. 'and' Operator When using the and operator, Python checks to see if the first boolean expression is ______. If it is ______, Python returns ______ and ignores the second boolean expression.
true, true, true false, false, false
Fill in the blanks below to incorporate the variables var1 and var2 into the string my_string so that it reads "The cat in the hat." var1 = 'hat' var2 = 'cat' my_string = "The {} in the {}.".format(_____, _____)
var2, var1
