Spring 2017 CS230
This is a course about data structures and we happen to use java
Lecture 1: Intro to CS230
Reading: LDC Ch 1 & 2
Lecture 2: Java constructs, conditionals, iteration
Reading: LDC Ch 3 & 4. (Optional: 3.6 and 3.7)
Lecture 5: Arrays of Objects and Inheritance
Reading: LDC Ch 7 & 8
Lecture 7: Interfaces and Exceptions
Reading: LDC Ch 9.3 - 9.4 & Ch 10 (except 10.4)
Lecture 8: Collections and Stacks
Reading: LDC Ch 14.1 - 14.9
In-class Midterm Exam 1
Lecture 9: Linked Lists
Reading: LDC Ch 14.10 - 14.14
Lecture 10: Analysis of Algorithms
Reading: LDC Ch 12
Lecture 12: Searching and Sorting
Reading: LDC Ch 13
Lecture 13: Introduction to Graphs
Reading: LDC Ch 19.1 - 19.4
Lecture 14: Graph traversals: DFS
Reading: LDC Ch 19.5
Lecture 16: Graph traversals: BFS, Graph Toplogical sort
Reading: LDC Ch 19.5
Lecture 17: Hash tables
Reading: LDC Ch 20
Lecture 18: Trees
Reading: LDC Ch 6.3, 6.7
Exam 2: Take-Home Due
Lecture 19: Tree implementation
Reading: LDC Ch 16
Lecture 22: Priority Queues and Heaps
Reading: LDC Ch 18
Lecture 23: Advanced Algorithms
Reading: LDC Ch 18
Lecture 24: NP-complete
Lecture 25: Red-Black Trees
Wrap up and Interview Practice
Exam 3: Take-Home Due
Last day of Final Exams
Prerequisites The prerequisite for CS230 is CS111, Computer Programming and Problem Solving. Students with significant programming experience (including knowledge of Java), or those who have received less than a B- in CS111 need the permission of the instructor.
ComputersAll programming in CS230 will be done using DrJava. If you want, you can use your own computer but you will have to maintain the software, and be prepared to use the department's machines if yours has problems. Sorry, we will not be able to help you trouble-shoot your own computer. The Documentation page has pointers to documentation for all the software packages used in CS230.
Course Directory The CS230 course directory is located at /home/cs230 on tempest. This directory contains material relevant to the class, including course software, and online versions of assignments and programs. Any required material of the course Java software will be placed in the download folder inside the /home/cs230 directory and you can access it using an ftp program (like Fetch on a Mac).
Course Group Please add yourself to the cs230-spring2017 google group. This group has several purposes. We will use it to make class announcements, such as corrections to assignments and clarifications of material discussed in class. We encourage you to post questions or comments that are of interest to students in the course. Please do not post significant amounts of Java code (i.e. more than one or two lines of code) in your messages on the group! The instructors and TAs will read messages posted in the group on a regular basis and post answers to questions found there. If you know the answer to a classmate's question, feel free to post a reply yourself. The course group is also a good place to find people to join a study group. You should plan on reading group messages on a regular basis.
Textbook Regular readings will be assigned from the required text, Java Foundations, by Lewis, DePasquale and Chase, 2nd edition. We will be using the 2nd edition (not the newer, 3rd edition). It is on reserve in the Science Library. It is recommended that you read the relevant sections twice a week.
Lectures and Labs There are two 70-minute lectures each week that will introduce the main content of the course. Every student is also required to attend one 110-minute lab each week. Lab work will include exercises to review and reinforce the lecture material and to develop general programming, testing and debugging skills. The labs will also provide further opportunity to ask questions about course material. Lectures are held on Tuesdays and Fridays at 9:50-11:00 AM (section 01 in SCI E211), at 1:30PM-2:40PM (section 02 in SCI E111). Labs are held on Wednesdays at 8:30am and 10:30am and Thursdays at 10:30am and 1:30pm in SCI E101. In labs you will be working with a partner. In general, be aware that labs contain more tasks than can reasonably be done in the available class time. Solutions to lab exercises will be linked from the lab's web page, at the end of the day; you are encouraged to study these solutions. At the end of the day of your lab, each student is required to submit whatever lab work they have worked on until then. These submissions will be part of the student's participation grade (see "Grading Policy").
Supplemental Instruction (SI) Supplemental Instruction (SI) is an academic support program offered for selected Wellesley courses. Our academic SI leaders, Sam and Eliana, are trained and highly experienced in tutoring CS230. They will offer two study sessions each week throughout the semester. During SI sessions they will cover problem set solutions and review important concepts. SI sessions are open to all students enrolled in the course. We highly recommend attending one of the SI sessions every week, as well as reviewing the handouts used in SI sessions.
Final Project: During the last few weeks of the semester, project teams of 3 students work on an extended programming project from scratch. After choosing an interesting application or problem, you will first build a skeleton of the object classes, methods, abstract data types and user interface needed for your application, and then fill in the details to create a fully working implementation. Each team will give a short presentation of their final project during the last two meetings of the semester, and will prepare a document with specifications, user's manual, code and documentation on their final project. Guidelines will be posted mid-semester. See our CS230 project gallery for information on student projects from recent semesters.
Exams: There will be three in-term, non-collaborative exams that are open book and open notes. The first is in-class and the other two are take-home. There will be no final exam. The take-home exams will require the use of a computer. You are not allowed to collaborate with anyone else on the take-home exams. The dates of the exams are listed on the schedule. Please mark the exam dates in your calendars as they are not flexible.
Assignments For assignments, normally a subset of assigned problems will be graded. The full credit of the assignment will be based on the graded subset. After assignments are submitted, sample solutions will be provided for all assigned problems.
Participation Lecture and lab participation has a weight of 10% of the total course grade. Participation includes attendance, active participation in class discussions, and uploading lab tasks.
Final Grades Your final grade for the course will be computed as a weighted average of several components. The relative weight of each component is shown below:
We believe that collaboration fosters a healthy and enjoyable educational environment. For this reason, we encourage you to talk with other students about the course material and to form study groups.
Programming assignments in this course can be challenging. Also teamwork is the norm in the CS industry. Given the above, some of the assignment work is required to be done with a partner, while some is required to be done individually. In each assignment tasks will be clearly marked as either "individual" or "pair-programming". The two team members must work closely together on the pair-programming tasks, and turn in a single hard copy of work they did together.
Pair-programming tasks are subject to the following ground rules:
In general, teams are allowed to discuss assignment tasks with other teams and exchange ideas about how to solve them. However, there is a thin line between collaboration and plagiarizing the work of others.
Each team or individual student must compose their own solution to each task. Discussing strategies and approaches with classmates and receiving general debugging advice from them is acceptable and encouraged. However you (and your partner) are required to write and debug all of your code. Furthermore, you should never look at another student's code. For example, it is OK to borrow code from the textbook, from materials discussed in class, and from other sources as long as you give proper credit. However, it is unacceptable and constitutes a violation of the Honor Code (1) to write a program together with someone not part of your team and turn in two copies of the same program, (2) to copy code written by your classmates, (3) to read another student's or team's code or (4) to view assignments, exams and solutions from previous terms of CS230. In keeping with the standards of the scientific community, you must give credit where credit is due. If you make use of an idea that was developed by (or jointly with) others, please reference them appropriately in your work. It is unacceptable for students to work together but not to acknowledge each other in their write-ups.