GoMechanic Interview Questions, Process, and Tips

Round duration - 120 Minutes
Round difficulty - Easy

It is vesy helpful to learn more about this topic and improve my knowledge in the specific areas

Q1. 
Time to Burn Tree Problem
You are given a binary tree consisting of 'N' unique nodes and a start node where the burning will commence. The task is to calculate the time in minutes required to completely b...read more
Ans. 
Calculate the time in minutes required to completely burn a binary tree starting from a given node.
• Start burning from the given node and spread fire to adjacent nodes each minute

• Track the time taken for each node to burn completely

• Return the maximum time taken to burn the entire tree
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Q2. 
Buy and Sell Stock Problem Statement
Imagine you are Harshad Mehta's friend, and you have been given the stock prices of a particular company for the next 'N' days. You can perform up to two buy-and-sell ...read more
Ans. 
The task is to determine the maximum profit that can be achieved by performing up to two buy-and-sell transactions on a given set of stock prices.
• Iterate through the array of stock prices to find the maximum profit that can be achieved by buying and selling stocks at different points.

• Keep track of the maximum profit that can be obtained by performing two transactions.

• Consider all possible combinations of buying and sel...read more
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Round duration - 120 Minutes
Round difficulty - Easy

Q1. 
Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
...read more
Ans. 
Find pairs of elements in an array that sum up to a given value, sorted in a specific order.
• Iterate through the array and for each element, check if the complement (S - current element) exists in a hash set.

• If the complement exists, add the pair to the result list.

• Sort the result list based on the criteria mentioned in the problem statement.
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Q2. 
Delete the Middle Node from a Singly Linked List
Given a singly linked list of integers, the task is to remove the middle node from this list.
Input:
The first line of input includes an integer 'T' whic...read more
Ans. 
Remove the middle node from a singly linked list of integers.
• Identify the middle node using slow and fast pointers.

• Remove the middle node by adjusting the pointers.

• Handle cases where there are two middle nodes.

• Return NULL if no middle node exists.
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Round duration - 50 Minutes
Round difficulty - Easy

Q1. 
Different Ways To Add Parenthesis
Suppose you have a string 'S' representing an arithmetic expression. Your task is to compute all potential outcomes by adding valid parentheses in different ways to evalu...read more
Ans. 
Compute all potential outcomes by adding valid parentheses in different ways to evaluate an arithmetic expression.
• Iterate through the expression and try adding parentheses at different positions to evaluate all possible outcomes

• Use recursion to explore all possible combinations of adding parentheses

• Keep track of the valid outcomes and return them as a list of results
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Q1. Previous experience details questioned.
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Q1. Just brief questioned anout previous experience
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Q1. Just speak up in confidence
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Q2. Have good information of car brands, and their technicalities
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Q1. Common Questions only
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Q1. Cars servicing, exterior and interior
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