Rick is a fan of logic-based games. However, he is bored of the classic ones, like Sudoku and Mastermind, since he has solved so many of them. Recently he found a new game in which one is given a string with some question marks in it. The objective is to replace all of the question marks with letters (one letter per question mark) in such a way that no letter appears next to another letter of the same kind.
Write a function:
def solution(riddle)
that, given a string riddle, returns a copy of the string with all of the question marks replaced by lowercase letters (a-z) in such a way that the same letters do not occur next to each other. The result can be any of the possible answers as long as it fulfils the above requirements.
Examples:
1. Given riddle = "ab?ac?", your function might return "abcaca". Some other possible results are 'abzacd", "abfacf".
2. Given riddle = "rd?e?wg??", your function might return "rdveawgab".
3. Given riddle = "????????", your function might return "codility".
Write an efficient algorithm for the following assumptions:
• the length of the string is within the range [1..100,000);
• string riddle consists only of lowercases letters (a - z) or '?';
• it is always possible to turn string 'riddle' into a string without two identical consecutive letters.
1 # you can write to stdout for debugging purposes, e.g.
2 # print("this is a debug message")
3
4 def solution (riddle):
5
6 # write your code in Python 3.6
7 pass

Answer:

The function is as follows:

import random

import string

def solution(riddle):

   s = list(riddle)

   for i in range(len(riddle)):

       alpha = "".join(random.choice(string.ascii_letters) for x in range(1))

       alpha = alpha.lower()

       if s[i] == '?':

           if i > 0 and i < len(s)-1:

               if s[i+1] != alpha:

                   s[i] = alpha

               elif s[i-1] != alpha:

                   s[i] = alpha

               else:

                   i=i

           else:

               if i == 0:

                   if s[1] != alpha:

                       s[i] = alpha

                   else:

                       i = i

               else:

                   if s[i-1] != alpha:

                       s[i] = alpha

                   else:

                       i = i

   riddle = ""

   for ele in s:

       riddle+=ele

   return riddle

Explanation:

See attachment for explanation where comments are used to explain some lines

In this exercise we have to use the knowledge of the python language to write the code, so we have to:

The code is in the attached photo.

So to make it easier the code can be found at:

import random

import string

def solution(riddle):

  s = list(riddle)

  for i in range(len(riddle)):

      alpha = "".join(random.choice(string.ascii_letters) for x in range(1))

      alpha = alpha.lower()

      if s[i] == '?':

          if i > 0 and i < len(s)-1:

              if s[i+1] != alpha:

                  s[i] = alpha

              elif s[i-1] != alpha:

                  s[i] = alpha

              else:

                  i=i

          else:

              if i == 0:

                  if s[1] != alpha:

                      s[i] = alpha

                  else:

                      i = i

              else:

                  if s[i-1] != alpha:

                      s[i] = alpha

                  else:

                      i = i

  riddle = ""

  for ele in s:

      riddle+=ele

  return riddle

See more about python at brainly.com/question/26104476

Explain working principle of computer.​

Write a C program that right shifts an integer variable 4 bits. The program should print the integer in bits before and after the shift operation. Does your system place 0s or 1s in the vacated bits?

How can you ensure that the website you are using is secured?
A.
website begins with http://
B.
website begins with https:// and has a green padlock
C.
website doesn’t have any padlock icon
D.
website has a red padlock icon

draw a flowchart and write the algorithm to find even number between 1 to 50​

what is the best plugin for subscription sites?

List the types of infrared we have

Which of the following is not the disadvantage of closed
network model?
Select one:
O Flexibility
O Public network connection
O Support
O External access​

This program exercise #4 wants the user to write a program in python that contains a list of movies titles, years and movie rating. You will need to display a menu option that allows the user to list all of the movies, add a movie, delete a movie and exit out of the program. This will be done using lists and the functions to add an element to a list and how to delete an element to a list. The program should be written utilizing functions in python for the main function, the display_menu function, the delete function, the add function and the list movie function. You can place this all in one python file or include them in various python files that include them into the main program. Let me know if you have any questions with this exercise. Output Screen: COMMAND MENU list - List all movies add - Add a movie del - Delete a movie exit - Exit program Command List: list 1. Monty Python and the Holy Grail, 1979, R 2. On the Waterfront, 1954, PG 3. Cat on a Hot Tim Roof, 1958, R Command: add Name: Gone with the Wind Year: 1939 Rating: PG Gone with the Wind was added.

How many types of video
compressions__
a. 4
b. 2.
• c. 3
d. 6​

To reduce the number of used digital outputs of the microcontroller, the display board is connected to the main board through the integrated circuit of the decoder, which converts binary coded decimal (BCD) values to signals for the seven-segment display. So, to show any number on the display you need to set the required BCD code on the microcontroller's outputs. Write a program to convert an integer number represented as a string to a BCD code required for the display. In the BCD code, every decimal digit is encoded with its four-bit binary value. Encoding all digits of the decimal number and concatenating the resulting codes into one string you will get a resulting BCD code. A space is used to separate digits in the BCD code and make it more readable. For example, a number 173 will be encoded to BCD as 0001 0111 0011.

A collection of computers and other hardware devices that are connected together to share hardware, software, and data, as well as to communicate electronically with one another? Explain.

Create a public class named InsertionSorter. It should provide one class method sort. sort accepts an array of Comparables and sorts them in ascending order. You should sort the array in place, meaning that you modify the original array, and return the number of swaps required to sort the array as an int. That's how we'll know that you've correctly implemented insertion sort. If the array is null you should throw an IllegalArgumentException. You can assume that the array does not contain any null values.
To receive credit implement insertion sort as follows. Have the sorted part start at the left and grow to the right. Each step takes the left-most value from the unsorted part of the array and move it leftward, swapping elements until it is in the correct place. Do not swap equal values. This will make your sort unstable and cause you to fail the test suites.

Can someone plz answer these questions

The L-exclusion problem is a variant of the starvation-free mutual exclusion problem. We make two changes: as many as L threads may be in the critical section at the same time, and fewer than L threads might fail (by halting) in the critical section. An implementation must satisfy the following conditions:_____.
L-Exclusion: At any time, at most L threads are in the critical section.
L-Starvation-Freedom: As long as fewer than L threads are in the critical section, then some thread that wants to enter the critical section will eventually succeed (even if some threads in the critical section have halted).
Modify the n-process Bakery mutual exclusion algorithm to turn it into an L-exclusion algorithm. Do not consider atomic operations in your answer. You can provide a pseudo-code solution or written solution.

La herramienta …………………………... en el programa CorelDraw X8, está conformado por texto artístico.

LAB: Contact list A contact list is a place where you can store a specific contact with other associated information such as a phone number, email address, birthday, etc. Write a program that first takes as input an integer N that represents the number of word pairs in the list to follow. Word pairs consist of a name and a phone number (both strings). That list is followed by a name, and your program should output the phone number associated with that name. Assume that the list will always contain less than 20 word pairs. Ex: If the input is: 3 Joe 123-5432 Linda 983-4123 Frank 867-5309 Frank the output is: 867-5309

determine if each statement is true or false:

graphics designers are responsible for communicating a message: TRUE

portfolios are not important for graphic design careers: FALSE


professional graphic designers join the american institute of graphic arts: TRUE

Which line of code will use the overloaded multiplication operation?

class num:
def __init__(self,a):
self.number = a

def __add__(self,b):
return self.number + 2 * b.number

def __mul__(self, b):
return self.number + b.number

def __pow__(self, b):
return self.number + b.number

# main program
numA = num(5)
numB = num(10)

Which line of code will use the overloaded multiplication operation?

class num:
def __init__(self,a):
self.number = a

def __add__(self,b):
return self.number + 2 * b.number

def __mul__(self, b):
return self.number + b.number

def __pow__(self, b):
return self.number + b.number

# main program
numA = num(5)
numB = num(10)

a) product = numA * numB
b) product = numA.multiply(numB)
c) product = numA.mul(numB

Fill in the blanks using A to J below.

1. ----- = command driven

2. ----- = general purpose

3. ----- = custom written

4. ----- = icon

5. ----- = menu driven

6. ----- = integrated software

7. ----- = desktop

8. ----- = system software

9. ----- = Window

10. ----- = software house

A. Software written to meet the specific needs of a company.

B. Related specialized programs combined in a unified package.

C. This software can be adapted for specific needs but is not written for any specific business purpose.

D. This interface requires the user to type in codes or words.

E. A pictorial representation of a file, folder, program, task or procedure.

F. This interface allows you to move a mouse or cursor to make a selection.

G. A rectangle that displays information on the screen.

H. A visual background over which all your work is done.

I. This software notifies the computer to begin sending data to the appropriate program to get a document printed.

J. A company that specializes in writing software.

which two of the following are goals of the cognitive therapist

What is the location used by users to configure delegate access on their own mailboxes? Backstage view > Account Settings Backstage view > Permissions O Inbox > Permissions O Calendar > Permissions​

answer any one: write a computer program:​

Implement the function _isPalindrome() in palindrome.py, using recursion, such that it returns True if the argument s is a palindrome (ie, reads the same forwards and backwards), and False otherwise. You may assume that s is all lower case and doesn’t include any whitespace characters.

Page Setup options are important for printing a PowerPoint presentation a certain way. The button for the Page Setup dialog box is found in the
File tab.
Home tab.
Design tab.
Slide Show tab.

________________risk in payment system requires improvements in the security framework. [ ]
a)Fraud or mistakes b)Privacy issues c)Credit risk d) All of the above.

Please write the answer for 15 points

Apart from the OOPs concepts learned in this lesson, identify additional concepts and write an essay on their functions. Explain how they are used in a program.
PLSSSS HELLP MEEE ASAP!!!!​

Which of these is a type of social engineering attack?
Select one:
O Packet Sniffer
O Port Scan
O Phishing
O Ping Sweep​

2.1 A friend is interested in installing a wireless LAN in her small business. She has about a dozen employees. You are setting up an 802.11g wireless access point for her business. Your aggregate throughput is only about 6 Mbps. List at least two possible reasons for this low throughput.

What’s unique about windows 8 compared to earlier windows

C++ coding, help
In this program you will be reading numbers from a file. You will validate the numbers and calculate the average of all of the valid numbers.
Your program will read in a file with numbers. The numbers will be of type double.
The numbers should be in the range from 0 to 110 (inclusive). You need to count all of the numbers between 0 and 110. You also need to calculate the average of these numbers.
If a number is not valid (that is, it is less than 0 or greater than 110) you need to count it (as a count of invalid values) and you need to write out the number to a file called "invalid-numbers.txt". Values written to file invalid-numbers.txt should be in fixed format with two digits to the right of the decimal point.
As you did in lab lesson 7 part 1 you need to read in the input file name using cin.
The output from your program will be written to cout. The output must contain the file being processed, the total number of values read in from the file, the number of invalid values read in, the number of valid values read in.
The last thing you need to output is either the average of the valid values or an error message. The average must have two digits of precision to the right of the decimal point and must be in fixed format. If there is not valid average you should output the message:
An average cannot be calculated
In what case would you display this message?
If the input file cannot be opened, you will need to output a message. Assume the input file name is badinput.txt and it cannot be opened. You will display the following error message to cout
File "badinput.txt" could not be opened
Here is an example of a working program:
Assume the file name read in from cin is:
input.txt
and that input.txt contains:
-12
0
98.5
100
105.5
93.5
88
75
-3
111
89
-12
Your program would output the following:
Reading from file "input.txt"
Total values: 12
Invalid values: 4
Valid values: 8
Average of valid values: 81.19
The contents written out to file invalid-numbers.txt are:
-12
-3
111
-12
You are reading from an input file and you are writing to an output file. Make sure you close both files after you are finished using them. You must do this in your program, you cannot just let the operating system close the files for you.
For tests where there is output written to an output file the contents of the output file will determine if you passed that test or not. For cases where you have written out to cout the tests will check the output sent to cout. In some cases output will be written to a file and to cout. When this is the case the test will be run twice with the same input. Once to test cout and once to test the contents of the output file. An example of this would be tests 2 and 3. Both use the same input file. Test 2 check the output written to cout and test 3 checks the output written to the file invalid-numbers.txt.