Soroco Software Engineer Interview Questions and Answers

2 questions on hakerrank
1) dp question to calculate the frequency of the elements of a tree
2) graph problem to calculate the cost to buy at one city and sell at another

Q1. Create a family tree where a node has at most 2 parents and n children. Create 2 functions to find all the nodes preceding the given node and all the nodes following.
Ans. 
Create a family tree with nodes having at most 2 parents and n children. Implement functions to find preceding and following nodes.
• Create a tree structure where each node has references to its parents and children

• Implement a function to find all nodes preceding a given node by traversing up the tree

• Implement a function to find all nodes following a given node by traversing down the tree

• Consider using depth-first search
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Q1. Center a div without using flexbox
Ans. 
To center a div without using flexbox, use margin auto and set width
• Set the width of the div

• Use margin: 0 auto; to center horizontally

• For vertical centering, use position: absolute; top: 50%; transform: translateY(-50%);
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Q2. How REST APIs work ?
Ans. 
REST APIs work by allowing clients to interact with server resources using standard HTTP methods.
• REST stands for Representational State Transfer

• Clients make requests to the server using standard HTTP methods like GET, POST, PUT, DELETE

• Responses from the server are typically in JSON or XML format

• REST APIs are stateless, meaning each request from a client to the server must contain all the information necessary to unders
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