Evaluate the following Postfix expression to find the final value. Trace the evaluation using class PostfixEvaluator. Show the operand stack each time it is modified. (Clearly show all steps) 2 3 4 + 9 7 - I

Practice / Frequency of Characters Write a method that returns the frequency of each characters of a given String parameter. If the given String is null, then return null If the given String is empty return an empty map Example input: output: empty map explanation: input is empty Example input: null output: null explanation: input is null. Since problem output is focused on the frequency we can comfortably use Map data structure. Because we can use characters as key and the occurrences of them as value. Example input: responsible output: {r=1, e=2, s=2, p=1, o=1, n=1, i=1, b=1, l=1} explanation: characters are keys and oc values ences are

Name:- Mit (Question-1) Note:- Please type this java code and also need an output for this given Java program.

Java (Generic Method) - What Order?

Count divisibles in range def count_divisibles_in_range(start, end, n): Let us take a breather by tackling a problem simple enough that its solution needs only a couple of conditional statements and some arithmetic, but not even one loop or anything even more fancy. The difficulty is coming up with the conditions that cover all possible cases of this problem exactly right, including all of the potentially tricksy edge and corner cases, without being off-by-one. Given three integers start, end and n so that start <= end, count how many integers between start and end, inclusive, are divisible by n. Sure, you could solve this problem with the list comprehension one-linerreturn len([x for x in range(start, end+1) if x % n == 0]) but of course the automated tester is designed so that anybody trying to solve this problem in such a blunt fashion will only find themselves running out of both time and space! Your code should have no loops at all, but use only integer arithmetic and…

C++ Improve the following existing methods: bool add(entry* e) Improve the add method where you will return true if the entry has been successfully added (i.e. the entry is placed in the top 10), otherwise return false (i.e. if the entry did not make it to the top 10). bool remove(const char* person) Improve the remove method where you return true if an entry is successfully deleted (i.e. we have found an entry that matches the person), otherwise return false.   Add the following additional methods: bool ban_country(const char* nation) Removes all the entries bearing the country equal to the given nation. Return true if at least one entry has been removed, otherwise return false. int country_wins(const char* nation) Returns the number of entries in the scoreboard who represents the given nation. int exemplary(int score) Returns how many entries in the scoreboard are greater than or equal to the given score. double average_score() Returns the average score of the entries in…

Question: PRE-REQUISITE: A balanced pair is that if there are opening brackets there will always a closing brackets for them. Write a Java Program to take n pair of brackets from the user & Your task is to find the number of ways that you can put those brackets in such a way that they will be always balanced.

(In Java language) Create a class Called NetflixDemo  Create two objects “user1” and “user2” of the Netflix class pictured below) Set various class variables for the Netflix class using these two objects. Call various methods of Netflix class using these two objects.   public class Netflix {public String movies [] = new String[10];public String trendingTop5 [] = new String[5];public String continueWatching [] = new String[5];public String username;public String password;private boolean isAuthenticated;public double balance;public int subscriberSinceYear;public static void logininfo() {Scanner input = new Scanner(System.in);System.out.println("Enter the username");String username = input.nextLine();System.out.println("Enter the password");String password = input.nextLine();boolean isAuthenticated = true;System.out.println(isAuthenticated + " , You have successfully logged in ");System.out.println();}public static void trendingList(){Scanner input = new…

pyhton language    Q10.3 Write a function mean() with a variable number of arguments that can return the mean average value of the arguments. If there is no input, print out an error message and return None.