AstroTalk Software Developer Interview Questions and Answers

Leecode medium level question

Leetcode Hard level Question

Q1. This is cto round asked some interview questions
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Computer Fundamentals

Q1. Flatten a binary tree
Ans. 
Flatten a binary tree by converting it into a linked list in-place.
• Use a recursive approach to flatten the binary tree.

• Traverse the tree in a pre-order manner and keep track of the previous node.

• Set the left child of each node to null and the right child to the next node in the linked list.

• Example: Input: 1 -> 2 -> 5 -> 3 -> 4 -> null, Output: 1 -> null -> 2 -> null -> 3 -> null -> 4 -> null -> 5 -> null
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They have their own coding platform. The questions are basically from tree.

Tree of space question

Q1. Previous round question solution
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Q2. System design was asked.
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3 Graph Questions Were asked of difficulty medium to hard.

Hackathon round which revolved around multithreading

Round duration - 90 minutes
Round difficulty - Hard

Timing was late evening . Platform was good.

Q1. 
Largest Cycle in Maze Problem Statement
Given a maze represented by 'N' cells numbered from 0 to N-1, and an array arr of 'N' integers where arr[i] denotes the cell number that can be reached from the 'i'...read more
Ans. 
Identify the length of the largest cycle in a maze represented by cells and an array of integers.
• Iterate through each cell and find the cycle length using DFS or Floyd's Tortoise and Hare algorithm.

• Keep track of visited cells to avoid infinite loops.

• Return the length of the largest cycle found or -1 if no cycles exist.
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Round duration - 90 minutes
Round difficulty - Medium

The coding round was 90 minutes with 2 question and the difficulty was mid-range and both were graph question

Q1. 
Rat in a Maze Problem Statement
You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...read more
Ans. 
Find all possible paths for a rat in a maze from start to destination.
• Use backtracking to explore all possible paths in the maze.

• Keep track of visited cells to avoid revisiting them.

• Explore all possible directions (up, down, left, right) from each cell.

• Add the current direction to the path and recursively explore further.

• When reaching the destination, add the path to the list of valid paths.
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- simple basic ios questions

Q1. Asked DSA array questions
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Kadance algorithm and find the middle of the linklist

More on java and Python based coding questions

Q1. Behavioural questions were asked
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Q2. What are your expectations from this job
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Q3. What are your plans ahead
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Q4. Where do you see yourself in 5 years ahead
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