Chapter 4: Functions..

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Test your function basics

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Hoh Trang

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Chapter 4: Functions..


Froggy Jumps Chapter 4: Functions..Online version Test your function basics by Hoh Trang 1 What is the formal definition of a "function" in Python? a A special file used to store Python scripts. b A named sequence of statements that performs a computation. c A variable that stores a large collection of numbers. 2 Which keyword is used to begin a function definition? a def. b built c function 3 What is the output of the following code? def func(a, b): return str(a) + b print(func(10, "5")) a 15 b 105 c 10 + 5 4 What is a "parameter"? a The final result of a mathematical calculation. b A built-in Python module like math or random. c A variable used inside the function definition to refer to the value passed as an argument. 5 What is the result of the expression max('Hello world')? a 11 b 'w' c 'H' 6 What is the result of the expression min('Hello world')? a 'H' b ' ' c 'd' 7 Which built-in function returns the number of items in its argument (e.g., characters in a string)? a size() b len(). c count() 8 If you call int(3.99999), what value is returned? a 3.9 b 3 c 4 9 Which function converts an integer or float into a string? a float() b int() c str(). 10 To use the sin() or sqrt() functions, which module must you first provide to Python? a import math. b include science c import random 11 What is "dot notation" in Python? a A way to end every line of code. b The syntax used to access a function inside a module c A method for creating bulleted lists in strings. 12 Approximately how many digits of accuracy does the constant math.pi provide? a 15. b 5 c 32 13 What value does the random.random() function return? a A random integer between 1 and 100. b A random float between 0.0 and 1.0 . c A random word from a dictionary. 14 Which function returns a random integer between a specific range, including both endpoints? a randint(low, high). b choice() c random() 15 What is the purpose of the random.choice() function? a It picks a random element from a sequence . b It asks the user to pick a number from the keyboard. c It sorts a list in random order. 16 What are the rules for naming a function? a They must always start with a capital letter. b They must include the word "func". c They follow the same rules as variable names. 17 What character must follow the function name and parentheses in a def statement? a A colon (:). b A period (.) c A semicolon (;) 18 What is the standard indentation for the "body" of a function in Python? a Two spaces b Four spaces. c One tab character 19 Does defining a function cause the code inside it to run immediately? a No, it only stores the code; it runs only when the function is called. b Yes, Python executes it as soon as it reads the def line. c Only if the function has no arguments. 20 What is "composition" in programming? a Organizing your files into folders. b Using an expression as part of a larger expression or statement c Writing a song using Python code. 21 What is the output of the following code? def say_hi(): return "Hello" result = say_hi() print(result + "!") a Hello b Hello! c None! 22 What is a "fruitful function"? a A function that produces a result (returns a value) to the caller. b A function provided by a third-party library. c A function that prints a "Welcome" message. 23 What is a "void function"? a A function that performs an action but does not return a value. b A function that always causes an error. c A function that is empty and does nothing. 24 If you assign the result of a void function (like print_twice) to a variable, what value will that variable hold? a False b None. c 0 25 What is the data type of the special value None? a NoneType. b str c int 26 Which statement is used to end a function's execution and send a result back? a return. b print c send 27 What is one primary reason to use functions to organize code? a To eliminate repetitive code and make the program smaller and easier to manage. b To make the program run slower and use more memory. c To make the code impossible for other humans to read. 28 What value is stored in the variable val? def calculate(n): res = n * 2 val = calculate(10) a 20 b 10 c None 29 What happens if you try to call a function before it has been defined in your script? a Python produces a NameError (traceback). b The function runs with default values. c Python waits for you to type the definition. 30 What is the output of the following code snippet? def computepay(hours, rate): return hours * rate pay = computepay(10, 20) print(pay + 50) a 200 b 250 c 50 31 What does this program print? def total(x, y): return x + y x = 5 total(10, 10) print(x) a 20 b 15 c 5

Chapter 4: Functions..

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Chapter 4: Functions..Online version

by Hoh Trang

What is the formal definition of a "function" in Python?

Which keyword is used to begin a function definition?

What is the output of the following code? def func(a, b): return str(a) + b print(func(10, "5"))

What is a "parameter"?

What is the result of the expression max('Hello world')?

What is the result of the expression min('Hello world')?

Which built-in function returns the number of items in its argument (e.g., characters in a string)?

If you call int(3.99999), what value is returned?

Which function converts an integer or float into a string?

To use the sin() or sqrt() functions, which module must you first provide to Python?

What is "dot notation" in Python?

Approximately how many digits of accuracy does the constant math.pi provide?

What value does the random.random() function return?

Which function returns a random integer between a specific range, including both endpoints?

What is the purpose of the random.choice() function?

What are the rules for naming a function?

What character must follow the function name and parentheses in a def statement?

What is the standard indentation for the "body" of a function in Python?

Does defining a function cause the code inside it to run immediately?

What is "composition" in programming?

What is the output of the following code? def say_hi(): return "Hello" result = say_hi() print(result + "!")

What is a "fruitful function"?

What is a "void function"?

If you assign the result of a void function (like print_twice) to a variable, what value will that variable hold?

What is the data type of the special value None?

Which statement is used to end a function's execution and send a result back?

What is one primary reason to use functions to organize code?

What value is stored in the variable val? def calculate(n): res = n * 2 val = calculate(10)

What happens if you try to call a function before it has been defined in your script?

What is the output of the following code snippet? def computepay(hours, rate): return hours * rate pay = computepay(10, 20) print(pay + 50)

What does this program print? def total(x, y): return x + y x = 5 total(10, 10) print(x)