year of exprience :2 year
Round 1: Command-Line Archive Utility
Objective: Build an archive utility (like a basic tar) with the following features — without using any existing archive/compression libraries.

Requirements:

Archive a Folder: Recursively create an archive from a folder while preserving the directory structure.
./archive-tool create ./my-folder archive1

Extract an Archive: Reconstruct the original folder structure.
./archive-tool extract archive1 ./restored-folder

List Archive Contents: Show all file paths in the archive.
./archive-tool list archive1

Extract a Specific File:
./archive-tool extract-file archive1 file.txt ./restored-folder

Verbose Mode: Add --verbose for detailed logs during operations.

Constraints:

No usage of tools like zipfile, zlib, java.util.zip, etc.

Only use standard libraries.

Handle errors gracefully (e.g., invalid paths, corrupt archives).

This round was focused on file system traversal, binary file creation/reading, and designing your own archive format.

Round 2: Graph Construction + Longest Chain & Cycle
Given several user-defined functions like:
def a(): b(), c()
def b(): ...
def c(): ...
Tasks:

Build an adjacency list from the function call dependencies.
Example: a → [b, c]

Find the Longest Chain: Longest path from any function to the deepest nested call (like DFS longest path).

Find the Longest Cycle: If there's a cycle, return the longest one.

Focus was on parsing, graph building, DFS, and cycle detection.

Outcome:
Both rounds went well and I received positive feedback. The recruiter later informed me that the position is currently on hold.