QUESTION 10List is a collection of elements with the same type that can be accessed by index. The size of list can increase dynamicallyO TrueO FalseQUESTION 11In C#, Dictionary is used to store a collection of key-value pairs. Keys can be null or duplicated. Values must be unique and cannot be null.O TrueO FalseQUESTION 12https://wtclass.wtamu.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_183007_1&course_id=_55233_1&content_id=_2535180_1&step=nullQUESTION 13No matter how many objects of the class are created, there is only one copy of the static member belonging to the class.O TrueO False4Q Searchstatic elements can be accessed directly using the class name without an object.O TrueO FalseW67%

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List is a collection of elements with the same type that can be accessed by index. The size of list can increase dynamically O True O False QUESTION 11 In C#, Dictionary is used to store a collection of key-value pairs. Keys can be null or duplicated. Values must be unique and cannot be null. O True O False QUESTION 12 No matter how many objects of the class are created, there is only one copy of the static member belonging to the class. O True O False QUESTION 13 static elements can be accessed directly using the class name without an object. O True

List is a collection of elements with the same type that can be accessed by index. The size of list can increase dynamically O True O False QUESTION 11 In C#, Dictionary is used to store a collection of key-value pairs. Keys can be null or duplicated. Values must be unique and cannot be null. O True O False QUESTION 12 No matter how many objects of the class are created, there is only one copy of the static member belonging to the class. O True O False QUESTION 13 static elements can be accessed directly using the class name without an object. O True

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Attach File Browse My Computer QUESTION 2 - use Eclipse to create a project. create a new class containing a main function. - Create a function describing the bubble sort to sort a LinkedList of Integers in the decreasing order (from the largest number to the smallest number). The function should accept a LinkedList and returm a LinkedLlist. Add also statements to trace the progress of bubble sort to display the LinkedList contents after each exchange. The main function should contain at least two test examples of the bubble sort function that you have create on various ordered and random LinkedList of Integers. NB: Send only the Java file containing your work. If the program dose not compile, marks will be reduced. if the program dose not properly as described above, marks will be reduced. Attach File Browse My Computer Click Save and Submit to save and submit. Click Save All Answers to save all answers. XI 門

# add your condition here def viewFile(dirName): # write your code here print("") def listCurrentDir(dirName): """Prints a list of the cwd's contents.""" lyst = os.listdir(dirName) for element in lyst:print(element) def moveUp(): """Moves up to the parent directory.""" os.chdir("..") def moveDown(currentDir): """Moves down to the named subdirectory if it exists.""" newDir = input("Enter the directory name: ") if os.path.exists(currentDir + os.sep + newDir) and\ os.path.isdir(newDir): os.chdir(newDir) else: print("ERROR: no such name") def countFiles(path): """Returns the number of files in the cwd and all its subdirectories.""" count = 0 lyst = os.listdir(path) for element in lyst: if os.path.isfile(element): count += 1 else: os.chdir(element) count += countFiles(os.getcwd()) os.chdir("..") return count def countBytes(path): """Returns the number of bytes in the cwd and all its subdirectories.""" count = 0 lyst = os.listdir(path) for element in lyst: if os.path.isfile(element):…
A date-to-event dictionary is a dictionary in which the keys are dates (as strings in the format 'YYYY-MM-DD'), and the values are lists of events that take place on that day. Complete the following function according to its docstring. Your code must not mutate the parameter! def group_by_year (events: Dict[str, List[str]]) -> Dict [str, Dict [str, List[str]]]: """Return a dictionary in which in the keys are the years that appear in the dates in events, and the values are the date-to-event dictionaries for all dates in that year. >>> date_to_event = {'2018-01-17': ['meeting', 'lunch'], '2018-03-15': ['lecture'], '2017-05-04': ['gym', 'dinner']} >>> group_by_year (date_to_event) {'2018': {'2018-01-17': ['meeting', 'lunch'], '2018-03-15': ['lecture']}, '2017': {'2017-05-04': ['gym', 'dinner']} } || || ||
get_movie_dict() takes a 2-D list similar to movie_db and a dictionary similar to ratings as the parameters and returns a dictionary, where each {key: value} of this dictionary is {a valid movie id: a list containing the name of the movie, the year it got released, and the average rating of this movie}. I will refer to this dictionary as movies.>>> movies = get_movie_dict(movies_db, ratings)>>> display_dict(movies)1: ['Toy Story', 1995, 3.92]2: ['Jumanji', 1995, 3.43]3: ['Grumpier Old Men', 1995, 3.26]4: ['Waiting to Exhale', 1995, 2.36]5: ['Father of the Bride Part II', 1995, 3.07]6: ['Heat', 1995, 3.95]7: ['Sabrina', 1995, 3.19]8: ['Tom and Huck', 1995, 2.88]9: ['Sudden Death', 1995, 3.12]10: ['GoldenEye', 1995, 3.5]11: ['American President The', 1995, 3.67]12: ['Dracula: Dead and Loving It', 1995, 2.42]13: ['Balto', 1995, 3.12]14: ['Nixon', 1995, 3.83]15: ['Cutthroat Island', 1995, 3.0]16: ['Casino', 1995, 3.93]17: ['Sense and Sensibility', 1995, 3.78]18: ['Four…
Project 3: Doubly-Linked List The purpose of this assignment is to assess your ability to: ▪Implement sequential search algorithms for linked list structures. ▪Implement sequential abstract data types using linked data ▪Analyze and compare algorithms for efficiency using Big-O notation Use the DLinkedList provided in class. You must not change any of the existing code in this file! You will add your code to this file. Add the following methods: A remove() method that removes a single node containing the value passed in as a parameter from the list. Method signature is provided and may not be changed. An insertOrder() method that inserts a value into the list in such a way that the list remains sorted in ascending order. Method signature is provided and may not be changed. An insertOrderUnique() method that does the same as insertOrder() with the additional requirement that the value is only inserted in the list if it is unique. Method signature is provided and may not be changed. A…
get_avg_ratings() takes a 2-D list similar to ratings_db as the parameter and returns a dictionary, where each {key: value} of this dictionary is {a valid movie id: the average rating this movie received by the reviewers}. I will refer to this dictionary as ratings.>>> ratings = get_avg_ratings(ratings_db)>>>> display_dict(ratings)1: 3.922: 3.433: 3.264: 2.365: 3.076: 3.957: 3.198: 2.889: 3.1210: 3.511: 3.6712: 2.4213: 3.1214: 3.83 15: 3.016: 3.9317: 3.7818: 3.719: 2.7320: 2.5 userId,movieId,rating,timestamp1,1,4,9649827035,1,4,8474349627,1,4.5,110663594615,1,2.5,151057797017,1,4.5,130569648318,1,3.5,145520981619,1,4,96570563721,1,3.5,140761887827,1,3,96268526231,1,5,85046661632,1,3,85673611933,1,3,93964744440,1,5,83205895943,1,5,84899398344,1,3,86925186045,1,4,95117018246,1,5,83478790650,1,3,151423811654,1,3,83024733057,1,5,965796031
185e def find(self, key): 186e 187 188 Efficiency: 189 Finds and returns a copy of value in the set that matches key. Use: value = source.find(key) 190 191 192 193 Parameters: 194 key - a partial data element (?) 195 Returns: 196 value - a copy of the full value matching key, otherwise None (?) 197 198 199 200 # your code here 201
//inserts e at index ind publicvoidadd(intind,Te){ //if index is invalid display a message and return //valid index are 0 to size //push all elements up by one all the down to index ind (stop at index ind) //insert e at index ind //increase the size }
Please correct the code for this lab. Current code: import random def create_random_open_ports(): #Create empty list / dictionary port = [] ports = {} #Fill list with 100 random port numbers from 10 - 100 for i in range(1,101): random_port = random.randint(10, 100) port.append(random_port) #Create a new dictionary with ports numbers as keys new_ports = ports.fromkeys(port, 0) #Iterate through new dictionary add random 0 / 1 #Closed port = 0, Open port = 1 for key in new_ports: r1 = random.randint(0,1) new_ports[key] = r1 return new_ports # TODO: create a function called create_host_IPs() that randomly generates a list of 10 IP addresses # concatenating the 4 values into a string and appending it to a host list. The function returns the generated # host list def create_host_IPs(): host = [] octet1 = "" octet2 = "" octet3 = "" octet4 = "" #Add loop with range 1 - 11 to create the 10 host IPs EX: 192.123.11.1…
A ValueError exception is raised if you try to retrieve a value from a dictionary using a nonexistent key. True or False
QUESTION 9 A given file can only be opened once per program -- you cannot close it and open again until after your program terminates. True False QUESTION 10 You need to store a list of players on a team so that you can look them up by number. The numbers are small and unique to each player, and neither the players nor their numbers change often. Should you use an ArrayList or a LinkedList? Linked List ArrayList It doesn't matter in this case.
Write a program that creates a dictionary containing course numbers and the room numbers ofthe rooms where the courses meet. The dictionary should have the following key-value pairs:Course Number (key) Room Number (value)CS101 3004CS102 4501CS103 6755NT110 1244CM241 1411The program should also create a dictionary containing course numbers and the names of theinstructors that teach each course. The dictionary should have the following key-value pairs:Course Number (key) Instructor (value)CS101 HaynesCS102 AlvaradoCS103 RichNT110 BurkeCM241 LeeThe program should also create a dictionary containing course numbers and the meeting timesof each course. The dictionary should have the following key-value pairs:Course Number (key) Meeting Time (value)CS101 8:00 a.m.CS102 9:00 a.m.CS103 10:00 a.m.NT110 11:00 a.m.CM241 1:00 p.m.The program should let the user enter a course number, then it should display the course’s roomnumber, instructor, and meeting time.