Sarthak Agrawal

• Developed a user level thread library (in C) with the API interface similar to the kernel-level pthreads library on 1 .
• The functions setjmp and longjmp were used to implement and achieve extremely fast context switch times (≈50 ns).

• A web-based dashboard for COVID-19 India which allowed users to ask highly customizable and dynamic queries.
• Relational design enabled efficient implementation of queries otherwise not seen in conventional COVID-19 dashboards
• The front-end was written in vanilla HTML, JS and CSS and backend was in flask. REST API conventions were followed.

Programmed an AI to play the pacman game and its various variants like CTF, Clear the board, etc. The AI could successfully avoid both enemies and focus on eating food pellets, and can also strategize in a team setting (the tournament variant). This project series was an application of various concepts taught in the course Artificial Intelligence such heuristic based A* search, Reflex agent dynamics, Q-learning, etc.

Developed a small tool in python to download multimedia files over a TCP connection given a list of servers (peers) that have a copy. The file was logically split into chunks, each chunk was fetched from a server dynamically based on speeds and latency of them. The download was spread over multiple threads for efficiency, the tool was resilient to disconnections and resumed on reconnection.

• Task was to identify a malicious executable given its strings, PE and cuckoo sandbox report file using supervised learning.
• Some of the features used were API call names and frequencies, network activity, API statistics, entropy, headers.
• Three models were trained and then ensembled to obtain the final model. Over 99.9% accuracy was achieved with low FP, FN

The source code has been made public, check it out on GitHub

The game is designed to teach players about firewall concepts with each levels having basic networking concepts. The goal is to teach simple commands and syntax of iptables which includes basic commands of adding rules to a firewall and understanding the use of chains. The Player in an administrator’s role sets up the firewall rules. Defense against various types of attacks; such as DOS attack, DDOS attack, IP Spoofing attack, etc. is taught through game play.

Try Online

• Implemented a lexer and parser to tokenize and parse input programs written in a subset of PROLOG language.
• Implemented a REPL interpretor which takes the generated AST from parser (acting as database) and queries as interactive input to generate the solution space.
• Backtracking and unification was used to discover the solution space. Implementation was done in Ocaml.

• Implemented a processor on a FPGA Board following a reduced subset of MIPS instruction set.
• Implemented a assembler and a software simulator for the processor with pipeline support in C++.
• Tools used : BASYS (FPGA Board), Vivado (lang. VHDL).

• Implemented a program which could take 2 word documents and output percentage similarity between them efficiently
• N-grams of words were extracted and used to build a trie. Modified jaccad similarity was used as a measure of similarity
• Model was able to detect cut-paste and light-revision plagiarisms efficiently even when number of documents to check was large

• Implemented a library in C programming language which allows exact computations on arbirarily large numbers.
• Both integer and floating point numbers were supported with arbitrary precision (user defined). Complex numbers were also supported.
• Efficient algorithms were used to support the following operations : Add, Sub, Multiply, Divide, Exponent, Sqrt.

• Implemented a basic version of shell for POSIX compliant systems.
• The implemented shell supports piping and redirection.
• Optimized for speed and usability. Colored fonts were also used.

• Designed a digital music synthesizer which could play upto 16 different musical notes.
• Harmonic overtones of notes were also superimposed for natural sound quality.
• Synthesized on FPGA board (BASYS). Tools used : Vivado, VHDL.