Introduction to Software Systems - Homework Assignments (044101)

Technion - Israel Institute of Technology | Spring 2023

---

Overview

This repository contains solutions for homework assignments from the Technion's "Introduction to Software Systems" course (044101, Spring 2023). Assignments cover C/C++ programming, scripting, system tools, ADTs, and reverse engineering.

---

Homework Assignments

1. HW0: C Language Refresher (HW0/)

   • Implemented C solutions for digit frequency counting, a number theory problem (N^N), and using variadic functions for min/max/sum calculations.
   • Concepts: C fundamentals, algorithms, variadic functions.

2. HW1: Bash Scripting - News Scraper (HW1/)

   • Developed a Bash script to scrape news articles from ynetnews.com, count occurrences of specific names, and output results to CSV.
   • Concepts: Bash scripting, wget, grep, text processing.

3. HW2: Bash & C - Grade Statistics (HW2/)

   • Created a system using Bash and C to process grade files, calculate statistics (mean, median, min/max, pass rate), and generate histograms.
   • Concepts: Bash/C integration, file I/O, argument parsing, basic statistics.

4. HW3: Abstract Data Type (ADT) - Generic Stack (HW3/)

   • Implemented a generic Stack ADT in C with support for user-defined element types (demonstrated with a Student type) and created a Makefile for compilation.
   • Concepts: ADTs, generic C (void*, function pointers), Makefiles, Stacks.

5. HW4: ADT & Shared Objects - Grade Management (HW4/)

   • Built a grade management system logic as a C shared library (.so), utilizing a provided Linked List shared library ADT. Focused on library creation and dynamic linking.
   • Concepts: Shared libraries (.so), dynamic linking, ADT usage, Makefiles.

6. HW6: C++ Firewall Implementation (HW6/)

   • Implemented C++ classes for parsing and matching firewall rules based on IP addresses and ports, integrated with a Bash script driver.
   • Concepts: C++ OOP, string parsing, basic networking concepts.

7. HW9: Machine Basics - Reverse Engineering "Vault" (HW9/)

   • Reverse engineered a provided binary executable ("Escape Room" style) using GDB and static analysis to find six hidden passwords.
   • Concepts: Reverse engineering, x86 assembly basics, GDB, binary analysis.

---

Technologies Used

• Languages: C, C++, Bash Scripting
• Debugging Tools: GDB, Valgrind
• System Tools: Standard Linux command-line utilities (wget, grep etc.)
• Version Control: Git