Java Assessment 3

Overview

• This assessment has 5 sections.
  1. fundamentals
     • VowelUtils
     • StringUtils
  2. arrays
     • SquareArrayAnalyzer
     • TicTacToe
  3. object orientation
     • RockPaperScissors
  4. collections
     • Lab
     • Student
     • LabStatus
  5. generics
     • ArrayUtility - Difficult

Each section has a README - so READ THEM. And Read the Tests, there are 94 of them. If you find yourself confused about the text descriptions, always write code to pass the tests.

All points are equal. Be sure to get as many points (get the low hanging fruit, get the easy ones) by solving them in any order.

Standard Rules apply: Frequently Asked Questions

• Can I use content from my old labs and assessments?
  • Yes.
• Can I use content from the web / google?
  • Yes.
• Can I contact someone other than an instructor for help?
  • No. And not zipcoders, past, present or future.
• Can I use other zipcoders code?
  • No-- Absolutely not.
• Can I modify the tests?
  • No-- Absolutely not. You are forbidden from modifying the tests.
• What if the tests are requesting something different than the instructions / comments?
  • Code against the tests, not the instructions.
  • Refer to the tests to have a better understanding of the intended behavior.
• Can I use any AI/ChatGPT-like assistance?
  • No, this is the same as contacting an expert friend to help. Not okay.

Section 1 - Fundamentals

VowelUtils

• Methods to Complete
  • Boolean hasVowels(String word)
    • return true if word contains a, e, i, o, or u.
  • Boolean isVowel(Character character)
    • return true if character is a, e, i, o, or u
  • Integer getIndexOfFirstVowel(String word)
    • return the index of the first vowel occurring in word
  • Boolean startsWithVowel(String word)
    • return true if first character of word is a vowel

StringUtils

• Methods to Complete
  • String capitalizeNthCharacter(String str, Integer indexToCapitalize)
    • return str with the character at indexToCapitalize capitalized
  • Boolean isCharacterAtIndex(String baseString, Character characterToCheckFor, Integer indexOfString)
    • return true if baseString has characterToChexFor at index of indexOfString.
  • String[] getAllSubStrings(String string)
    • return the powerset of characters of string
  • Integer getNumberOfSubStrings(String input)
    • return the number of all substrings in input

Section 2 - Arrays

Square Array Checker

• Given two arrays a and b write a method compare(a, b) that returns true if the two arrays have the "same" elements, with the same multiplicities. "Same" means, here, that the elements in b are the elements in a squared, regardless of the order.

Example 1 - Valid Array

a = [121, 144, 19, 161, 19, 144, 19, 11]  
b = [121, 14641, 20736, 361, 25921, 361, 20736, 361]

• compare(a, b) returns true because in b
  • 121 is the square of 11,
  • 14641 is the square of 121,
  • 20736 the square of 144,
  • 361 the square of 19,
  • 25921 the square of 161, and so on.

Example 2 - Invalid Array

a = [121, 144, 19, 161, 19, 144, 19, 11]  
b = [132, 14641, 20736, 361, 25921, 361, 20736, 361]

compare(a,b) returns false because in b 132 is not the square of any number of a.

Example 3 - Invalid Array

a = [121, 144, 19, 161, 19, 144, 19, 11]  
b = [121, 14641, 20736, 36100, 25921, 361, 20736, 361]

compare(a,b) returns false because in b 36100 is not the square of any number of a.

TicTacToe

• Description
  • The purpose of this class is to create a model of a TicTacToe board.
  • To be homogenous means to be of a single type or value.
• Methods to Complete
  • String[] getRow(Integer rowInde)
    • returns the array representative of the respective row index
  • String[] getColumn(Integer columnIndex)
    • returns the array representative of the respective column index
  • Boolean isRowHomogenous(Integer rowIndex)
    • returns true if the respective row contains 1 unique value.
  • Boolean isColumnHomogeneous(Integer columnIndex)
    • returns true if the respective row contains 1 unique value.
  • String getWinner()
    • return the String value of a homogenous row, column, or diagnol
  • String[][] getBoard()
    • return the array representation of this TicTacToe board

Section 3 - Object Orientation

RockPaperScissorsEvaluator

• Description
  • Rock paper scissors is a hand game which allows a player to select 1 of 3 states: ROCK, PAPER, or SCISSORS.
  • A player who select ROCK will defeat a player who selects SCISSORS
  • A player who selects PAPER will defeat a player who select ROCK
  • A player who selects SCISSORS will defeat a player who selects PAPER

ROCK

• Sample Script

  // : Given
  RockPaperScissorHandSign rock = RockPaperScissorHandSign.ROCK;
  
  // : When
  RockPaperScissorHandSign winner = rock.getWinner();
  RockPaperScissorHandSign loser = rock.getLoser();
  
  // : Then
  System.out.println(winner);
  System.out.println(loser);
  

• Sample Output

  PAPER
  SCISSORS
  

PAPER

• Sample Script

  // : Given
  RockPaperScissorHandSign paper = RockPaperScissorHandSign.PAPER;
  
  // : When
  RockPaperScissorHandSign winner = paper.getWinner();
  RockPaperScissorHandSign loser = paper.getLoser();
  
  // : Then
  System.out.println(winner);
  System.out.println(loser);
  

• Sample Output

  SCISSORS
  ROCK
  

SCISSORS

• Sample Script

  // : Given
  RockPaperScissorHandSign scissors = RockPaperScissorHandSign.SCISSORS;
  
  // : When
  RockPaperScissorHandSign winner = scissors.getWinner();
  RockPaperScissorHandSign loser = scissors.getLoser();
  
  // : Then
  System.out.println(winner);
  System.out.println(loser);
  

• Sample Output

  ROCK
  PAPER
  

Section 4 - Collections

Lab

• Description
  • The purpose of this class is to encapsulate a name and LabStatus for a particular instance of a Lab
• Methods to Complete
  • String getName()
  • LabStatus getStatus()
  • void setStatus(LabStatus status)

Student

• Description
  • The purpose of this class is to encapsulate and manage a composite List of Lab objects.
• Methods to Complete
  • Lab getLab(String labName)
  • void setLabStatus(String labName, LabStatus status)
  • void forkLab(Lab lab)
  • LabStatus getLabStatus(String labName)

LabStatus

• Description
  • The purpose of this class is create enumerations representative of different states of a Lab for a particular Student.
• Enumerations to be created
  • COMPELTED, INCOMPLETE, PENDING

Section 5 - Generics

ArrayUtility

• Description
  • The purpose of this class is to create a utility for handling generic array operations.
• Methods to Complete
  • SomeType findOddOccurringValue()
  • SomeType findEvenOccurringValue()
  • Integer getNumberOfOccurrences(SomeType valueToEvaluate)
  • SomeType[] filter(Function<SomeType, Boolean> predicate)