Ap Computer Science 2016 Free Response Questions Solutions And Analysis

The provided source material is insufficient to produce a 2000-word article about free samples, promotional offers, no-cost product trials, brand freebies, and mail-in sample programs as requested. Below is a factual summary based on the available data, which focuses exclusively on AP Computer Science A exam solutions from 2016.

Overview of 2016 AP Computer Science A Free Response Questions

The source material contains information about the Free-Response portion of the 2016 AP Computer Science A exam. The questions are described as exceptionally long and more challenging than most years. Four specific free response problems are addressed in the sources:

1. RandomStringChooser (also referred to as RandomLetterChooser in one source)
2. LogMessage
3. Crossword
4. StringFormatter

Detailed Analysis of Free Response Problems

LogMessage Problem

The LogMessage problem is the second free response question from the 2016 exam. The problem consists of two parts:

Part (a): The LogMessage constructor java public LogMessage(String message) { int colonIndex = message.indexOf(":"); machineId = message.substring(0, colonIndex); description = message.substring(colonIndex + 1); } This constructor splits a String message into two parts using the colon as a delimiter. The machineId is assigned the substring before the colon, and the description is assigned the substring after the colon.

Part (b): The containsWord method The containsWord method checks if a keyword exists in the description. The implementation uses the indexOf method to find the keyword and then checks the characters before and after to ensure it's a complete word.

Additional LogMessage Method

The sources also include a method called removeMessages that processes a list of LogMessage objects and removes those containing a specific keyword:

java public List<LogMessage> removeMessages(String keyword) { ArrayList<LogMessage> removedMessages = new ArrayList<LogMessage>(); int i = 0; while(i < messageList.size()) { if(messageList.get(i).containsWord(keyword)) removedMessages.add(messageList.remove(i)); else i++; } return removedMessages; }

This method demonstrates how to handle ArrayList manipulation within a loop, removing elements that match the keyword while preserving those that don't.

Other Free Response Problems

The sources mention three other free response problems but provide less detail:

1. RandomStringChooser/RandomLetterChooser: This problem involves a constructor that requires a call to a static method within a call to a superclass constructor, which is noted as unusual but legal.

2. Crossword: This problem requires both a simple method and a moderately complex constructor that includes initialization of a 2D array.

3. StringFormatter: No specific details are provided about this problem in the source material.

Educational Resources Available

The source material indicates several resources available for students studying for the AP Computer Science A exam:

1. A repository of solutions to free response questions from 2016
2. Educational websites providing explanations and solutions to exam problems
3. Java student projects that allow students to test their code implementations
4. Review slides for various years of the AP Computer Science A exam
5. Workshop offerings for further study

Practice Materials

The sources reference a 2016 Practice AP Computer Science A Exam that contains 40 questions about Java programming concepts from before version 8. However, the document only provides answers (A through E) for each question without including the actual questions themselves.

Conclusion

The provided source material focuses exclusively on educational resources for the AP Computer Science A exam, particularly the 2016 free response questions. It includes solutions to problems like LogMessage, RandomStringChooser, Crossword, and StringFormatter, along with references to additional study materials and practice exams. There is no information in the source material related to free samples, promotional offers, product trials, brand freebies, or mail-in sample programs as requested in the original task.

Sources

1. AP Computer Science 2016 Free Response Solutions
2. AP Computer Science Tutoring - 2016 Exam Answers
3. LogMessage Free Response Solution
4. AP Computer Science A Free Response Solutions
5. 2016 Practice AP Computer Science A Exam
6. AP Computer Science Free Response Solutions