Podcast
Questions and Answers
How many times will the word 'exam' be printed by the given code fragment?
How many times will the word 'exam' be printed by the given code fragment?
- Infinite Loop
- 9
- 11 (correct)
- 10
Which of the following correctly matches the input to its data type?
Which of the following correctly matches the input to its data type?
- [3.1, 4.2] -> tuple
- 'hello' -> string (correct)
- (2, 3) -> list
- [1, 2, 3] -> tuple
What will the recursive function return if lst = [1,2,3]?
What will the recursive function return if lst = [1,2,3]?
- 4.0
- 32.0
- 1
- 64.0 (correct)
What is the output of the function call 'whatisthis(3)' based on the definitions provided?
What is the output of the function call 'whatisthis(3)' based on the definitions provided?
In the for loop, what is the value of x after the first iteration when using 'for x in range(20,9,-1)'?
In the for loop, what is the value of x after the first iteration when using 'for x in range(20,9,-1)'?
What type of data structure is the output of foo2(2) in the foo1 function?
What type of data structure is the output of foo2(2) in the foo1 function?
What value does the variable 'a' hold in the function after the first recursive call with lst = [1,2,3]?
What value does the variable 'a' hold in the function after the first recursive call with lst = [1,2,3]?
Which of the following will NOT result in an error when run in Python?
Which of the following will NOT result in an error when run in Python?
What will be the output of the expression f1(5)
?
What will be the output of the expression f1(5)
?
What is the output of whatisthis(2) + foo2(2)
?
What is the output of whatisthis(2) + foo2(2)
?
What would be a more meaningful name for the function f1
?
What would be a more meaningful name for the function f1
?
How does function f2
relate to function f1
?
How does function f2
relate to function f1
?
Which of the following statements correctly completes the function isprime(x)
?
Which of the following statements correctly completes the function isprime(x)
?
Which statement correctly completes the return condition in isprime(x)
?
Which statement correctly completes the return condition in isprime(x)
?
What would be the result of calling foo2(3)
based on the provided functions?
What would be the result of calling foo2(3)
based on the provided functions?
What is a potential flaw in the implementation of isprime(x)
?
What is a potential flaw in the implementation of isprime(x)
?
What will the function 'counting_clouds' return if provided with an empty list?
What will the function 'counting_clouds' return if provided with an empty list?
Which option correctly completes the 'counting_clouds' function to count clouds wider than 5?
Which option correctly completes the 'counting_clouds' function to count clouds wider than 5?
In which implementation of the Fibonacci series does the function perform the slowest?
In which implementation of the Fibonacci series does the function perform the slowest?
What does the 'stopTime' function return when evaluated as stopTime(100)?
What does the 'stopTime' function return when evaluated as stopTime(100)?
The condition checked in 'stopTime' for stopping is based on which variable?
The condition checked in 'stopTime' for stopping is based on which variable?
What will be the outcome if a width smaller than or equal to 5 is passed to 'counting_clouds'?
What will be the outcome if a width smaller than or equal to 5 is passed to 'counting_clouds'?
In the context of list slicing, what does 'clouds[1:]' represent?
In the context of list slicing, what does 'clouds[1:]' represent?
What is the main purpose of the while loop inside 'stopTime' function?
What is the main purpose of the while loop inside 'stopTime' function?
What will the function return when called with lst = [1,2,3,4,5] in ForFunction3?
What will the function return when called with lst = [1,2,3,4,5] in ForFunction3?
What will be the output of pass_grade(50) when using the given function?
What will be the output of pass_grade(50) when using the given function?
What will mylst[:4] return based on the provided mylst?
What will mylst[:4] return based on the provided mylst?
What does mylst[-1] evaluate to?
What does mylst[-1] evaluate to?
What will mylst[2:-1:2] return given the definition of mylst?
What will mylst[2:-1:2] return given the definition of mylst?
What will be the output of the following expression: mylst?
What will be the output of the following expression: mylst?
In the context of getTime(X,Y), what should be returned if no path is found?
In the context of getTime(X,Y), what should be returned if no path is found?
What does the expression number // 4 calculate?
What does the expression number // 4 calculate?
What will be the output of getTime('Gym','School')
based on the given map?
What will be the output of getTime('Gym','School')
based on the given map?
Which code should replace Code_A to correctly check for the path from X to Y?
Which code should replace Code_A to correctly check for the path from X to Y?
What is the purpose of Code_B in the getTime
function?
What is the purpose of Code_B in the getTime
function?
What will happen if Code_C is replaced incorrectly in the getTime
function?
What will happen if Code_C is replaced incorrectly in the getTime
function?
What will be the result of evaluating whatif(5,6,7)
as defined in the provided function?
What will be the result of evaluating whatif(5,6,7)
as defined in the provided function?
Which condition in the whatif
function is invalid due to the use of the assignment operator?
Which condition in the whatif
function is invalid due to the use of the assignment operator?
Which of the following options can appropriately serve as a base case in a recursive function?
Which of the following options can appropriately serve as a base case in a recursive function?
What is the desired outcome of completing the recursive function if no base case is provided?
What is the desired outcome of completing the recursive function if no base case is provided?
Study Notes
Question 22
- The code fragment uses a for loop with a range of 20 to 9, stepping by -1
- This means the loop will iterate 11 times (20, 19, 18, ... 10, 9)
- The loop prints "exam" in each iteration
- Therefore, the word "exam" will be printed 11 times
Question 23
["hello", "again"]
is classified as a list data type(2,3)
is classified as a tuple data type"hello"
is classified as a string data type
###‌ Question 24
- The function
function(lst)
is recursive, calling itself with a smaller sublist - The base case is
lst == []
(an empty list), which returns1
- When
lst
is not empty, the function recursively calls itself withlst[1:]
(removing the first element) - It then calculates
a * function(lst[1:]) * math.sqrt(16)
- After three recursive calls, the function returns
1 * 4 * 4 * 4
which equals64
- In this case, the
math.sqrt(16)
is irrelevant since it's constant
Question 25
foo2(2)
returns1 + 2 = 3
, which is used infoo1()
foo1()
returns3
whatisthis(2)
returns3 + 2 = 5
foo2(2)
returns1 + 2 = 3
- Therefore,
whatisthis(2) + foo2(2)
evaluates to5 + 3 = 8
Question 26
f1(x)
callsf2(x-1)
unlessx
is 0, which returnsTrue
f2(x)
callsf1(x-1)
unlessx
is 0, which returnsFalse
f1(5)
callsf2(4)
, which callsf1(3)
, which callsf2(2)
, which callsf1(1)
, which callsf2(0)
f2(0)
returnsFalse
and propagates back through the function calls untilf1(5)
returnsFalse
Question 27
- The purpose of the code is to check if a number
x
is a prime number (divisible by 1 and itself only) CODE_A
should bex % c
(the remainder ofx
divided byc
) to check for divisibilityCODE_B
should beFalse
to returnFalse
ifx
is divisible by any number other than 1 andx
CODE_C
should beTrue
to returnTrue
ifx
is not divisible by any number within the loop
Question 4
- The function should count the number of clouds in the
clouds
list that have a width greater than 5 - The base case is an empty list (
clouds == []
), which returns0
- When
clouds
is not empty, it checks if the width of the first cloud is greater than 5 - If yes, it should increment a counter and call itself recursively with the rest of the list (
clouds[1:]
) - If no, it directly calls itself recursively with the rest of the list (
clouds[1:]
)
Question 5
- The augmenting recursion version took the longest time to run for fibonacci series
Question 6
- The function has a recursive call within the while loop
- The base case is
time == endOftime-1
, which returns -1 - In the code above,
endOftime
is set to 999, andtime
starts at 0 - The while loop keeps executing until
time
reaches 998 (endOftime - 1) - When
time
reaches 998, the base case is hit, and -1 is returned
Question 7
- The function iterates through the list elements with a for loop
- The function returns the length of the list after the loop
- The if conditional
(el == 0)
is never satisfied since the list is[1,2,3,4,5]
- The loop does nothing, and
len(lst)
returns5
Question 8
- The function returns
w = 50
- This is incorrect because the
=
operator is used for assignment, not comparison - The code will assign
w
to 50 and then returnw
, but it won't check ifw
equals 50. - Therefore, evaluating
pass_grade(50)
will return50
, not a boolean value
Question 9
- The function calculates the number of digits in a number
- The
count(number, total)
function uses recursion to check each digit - The base case is when
number
is less than 10. In this case, the function returnstotal
directly - Otherwise, it calls
count
recursively withnumber // 10
andtotal + 1
, iterating through the digits - The
digits(number)
function initializes thetotal
to 0 and callscount
to begin the digit counting process
Question 10
mylst[:4]
returns a slice of the list from the beginning up to, but not including, index 4, which is["COMP1126",[0,1,2,3,4,5,6,7], [], [[1,2,3]]]
mylst
returns the entire list["COMP1126",[0,1,2,3,4,5,6,7], [], [[1,2,3]]]
mylst[-1]
returns the last element of the list, which is[[1,2,3]]
mylst[2:-1:2]
returns a slice of the list starting at index 2 up to, but not including, the second-last element, taking every other element, which is[ [], [[1,2,3]] ]
Question 11
CODE_A
should bepath[0]
(first element ofpath
) which represents the starting locationX
CODE_B
should beand
to check if both starting and ending locations match theX
andY
of thepath
CODE_C
should bepath[2]
(third element ofpath
) to return the time between the locations
Question 12
- The function has a logical error
if (a = c) ...
is not a valid comparison in Python, it assignsa
toc
- Since
a
is being assigned in theif
condition,a
will always be equal toc
, leading to an infinite loop and the function never returning a value - The
or
condition also has the same error, which is why the function never returns a value
Question 13
- There is no code in the Question to provide a base case
- The code uses base cases to prevent infinite recursion in the
if
statements (e.g. ifx == 0
)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge of Python programming concepts with this quiz focused on loops, data types, and recursion. Determine how various data structures are used and how functions behave under certain conditions. Challenge yourself and see how well you understand these key concepts!