Blog

A base class can have multiple child classes.

Here is a class from one of our previous lab assignments but there is a bug. What is the bug?

Above is a partially defined recursive function that will create a wave pattern based on the input s. Below is an example output: Answer the following 1. (3 points) Complete the base case statement at Line 3 for the base case. 2. (3 points) Add a single line of code at Line 6 for the recursive call.

  Using Big-O notation, the worst case runtime complexity of the above function is

Based on the class Room definition from Coding Project 2, which of the following are acceptable  ways to instantiate a new Room object called study_hall? Assume jane_doe, guttag_text, and lutz_text have already been created.

  The above is the Dealer class from the lecture on the object-oriented implementation of Twenty One. Dealer.visible_card is a Card object.  Here, the Dealer and Player are linked by a ___ relationship.  Dealer and Card are linked by a ___relationship.

Here is the merge sort function from lecture Rather than sorting the input based on values, suppose we want to allow the user to provide a function (or lambda) to sort any iterable input. 1. (3 points) Update the function call to support a second input called ‘key’ and set the default to be a lambda that returns the input (unchanged, i.e. the identity function f(x) = x). 2. (2 points). Which single other line of code should be updated to use this key for sorting the elements? Write the updated line of code.  2. (3 points) Which line(s) represent the recursive call(s)?

In the above d.baz() calls and b.foo() calls

Reading II – Ms. Yamada writes an email about her trip in Montreal, Canada to her friend, Mr. Yamashita. (3 pts) (おしろ = castle) 山下さん、今、カナダのモントリオールにいます。ここはちょっとさむいです。モントリオールはとてもきれいなまちです。きのうはおしろをみました。ふるかったですが、とてもきれいでした。たくさんしゃしんをとりました。 よるはクラシックのコンサートに行きました。よかったです。モントリオールにはカフェがたくさんあります。まい日カフェでコーヒーを飲みます。すごくおいしいですよ。カフェには外国人がたくさんいて、にぎやかです。山下さん、だいがくはどうですか。たいへんですか。    メールしてください。では、また。山田もえ Circle “True” if the following information is correct. If the information is not correct, circle “False”. (1×3=3) Ms. Yamada is currently in Montreal. [1] Ms. Yamada goes to a cafe every day. [2] Ms. Yamada is going to write another email to Mr. Yamashita later. [3]

©LS Complete the following code for a StringBuilder as instructed in the line comments.©LS  Be conscious of the type of object you’re dealing with, which in turn dictates the method(s) you’re using.©LS String title = “President”, name = “Jack kennedy”, country = “United States”; //©LS [StringBldrObj]  //©LS Create a StringBuilder object called correctName and send it name.©LS [Capitalize]  //©LS Capitalize the ‘k’ in “Kennedy”.©LS Cannot use toUpperCase() or deleteCharAt(). ©LS  [Replace]  //©LS Replace “Jack” with “John”.©LS [InsertTitleSp]  //©LS Insert the title and a space (think concatenate w/symbol).©LS [Msg]  //©LS Append ” was the 35th President of the ” to the object.©LS [Country]  //©LS Append the country and a period.©LS [PrintObj]  //©LS Print the object using an implicit call to toString().©LS /* ©LS Use the StringBuilder object to call its toString() explicitly, then call split()  * to tokenize the String version of the StringBuilder object into an array called message.©LS   * Use a space as the delimiter or separator.©LS This is all one Java statement.*/[SplitToTokenize]  [EnhancedFor]  //©LS Code the header for an enhanced for to print the tokens from the message array.©LS The variable to hold each token is called word.               {   System.out.[printf](“%n%s”, [arg]);  //©LS Fill-in the correct method to print.                                           //©LS Fill-in the correct argument.}//©LS END enhanced for