Yahoo Network Specialist Interview Questions and Answers

Traverse through a matrix of uppercase english alphabets to find a given word. you are allowed to make up to k jumps, and same position can be repeated too.

Q1. Compression of 0-1 matrix of particular size.
Ans. 
Compression of 0-1 matrix involves reducing the size of the matrix by storing only the necessary information.
• Use run-length encoding to compress the matrix by storing consecutive repeated values as a single value and count.

• Identify patterns in the matrix that can be represented more efficiently.

• Consider using sparse matrix representation if the matrix has a lot of zeros.

• Implement efficient algorithms to compress and de...read more
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Q1. Question on trie
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Q2. Question on intervals
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Q1. What is actual rule is using to sale more products in this company
Ans. 
The actual rule for selling more products in this company is to focus on customer needs and provide excellent customer service.
• Focus on customer needs and preferences

• Provide excellent customer service

• Offer promotions and discounts

• Maintain high product quality

• Stay up-to-date with market trends

• Build strong relationships with customers

• Encourage customer feedback and use it to improve

• Train sales staff to be knowledgeable a
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Q1. What is AI ?
Ans. 
AI stands for Artificial Intelligence, which is the simulation of human intelligence processes by machines, especially computer systems.
• AI involves the development of algorithms that can perform tasks that typically require human intelligence.

• Examples of AI include speech recognition, image recognition, natural language processing, and autonomous vehicles.

• AI can be categorized into narrow AI (focused on a specific task...read more
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Q2. Tell me about machine learning
Ans. 
Machine learning is a branch of artificial intelligence that involves developing algorithms and models that can learn from and make predictions or decisions based on data.
• Machine learning uses algorithms to analyze data, learn from it, and make predictions or decisions.

• It is used in various fields such as healthcare, finance, marketing, and more.

• Examples of machine learning applications include recommendation systems, ...read more
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Q1. Find the possible ways to get the target score
Ans. 
There are multiple ways to achieve the target score in a game or competition.
• Incrementing by 1 point each time until reaching the target score

• Combining different point values to reach the target score

• Using bonus points or multipliers to reach the target score
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Round duration - 90 minutes
Round difficulty - Hard

Online coding round , 2-3 questions. Level - med-hard

Q1. 
Fibonacci Number Verification
Identify if the provided integer 'N' is a Fibonacci number.
A number is termed as a Fibonacci number if it appears in the Fibonacci sequence, where each number is the sum of...read more
Ans. 
Check if a given number is a Fibonacci number or not.
• Iterate through the Fibonacci sequence until you find a number greater than or equal to the given number.

• Check if the given number matches the Fibonacci number found in the sequence.

• If the given number matches, output 'YES'; otherwise, output 'NO'.
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Q2. 
Break The Board Problem Statement
Your task is to break a board of given dimensions 'L' by 'W' into 'L' * 'W' smaller squares, ensuring the total cost of breaking is minimized.
Input:
The first line con...read more
Ans. 
Minimize cost of breaking a board into smaller squares by optimizing horizontal and vertical cuts.
• Iterate through all possible horizontal and vertical cuts to find the minimum cost

• Use dynamic programming to store and reuse subproblem solutions

• Calculate the cost of breaking the board into smaller squares based on the given dimensions and cut costs
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Round duration - 60 Minutes
Round difficulty - Medium

2 interviewers , coding problem, no compilation.

Q1. 
Minimum Number Of People To Teach
Ninja has started a social networking site called Ninjas Space. The platform consists of ‘N’ users and supports ‘M’ different languages. Users communicate if they know at...read more
Ans. 
Determine the minimum number of users to teach a common language so all friends can communicate on a social networking site.
• Create a graph where users are nodes and friendships are edges.

• Find connected components in the graph.

• For each connected component, determine the minimum number of users to teach a common language.

• Return the sum of minimum users needed for all connected components.
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Round duration - 40 minutes
Round difficulty - Medium

CS fundamentals. Tough round. 40 mins interview. 1 interviewer from USA

Round duration - 40 minutes
Round difficulty - Hard

System Design Problem

Q1. Design a Facebook-like application.
Ans. 
Design a Facebook-like application for social networking.
• User profiles with personal information and photos

• News feed displaying posts from friends

• Ability to like, comment, and share posts

• Friend requests and messaging functionality

• Groups and events for community engagement
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Leetcode similar coding tests

Q1. How do you test the feasibility of an idea?
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Q2. Explain the process of calling an API
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Q1. Why do you want job in FB
Ans. 
I am passionate about networking and believe that working at FB will provide me with challenging opportunities to grow and learn.
• I am excited about the cutting-edge technology and infrastructure at FB

• I admire FB's commitment to innovation and collaboration

• I believe FB's global reach will allow me to work on diverse and impactful projects
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Q2. Do u have account in FB
Ans. 
Yes, I have an account on Facebook.
• Yes, I have an active account on Facebook.

• I use Facebook to connect with friends and family.

• I also use Facebook for networking and staying updated on industry news.
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Q3. Do you experience
Ans. 
Yes, I have experience in network engineering.
• I have worked as a network engineer for 5 years

• I have experience with Cisco routers and switches

• I have implemented and maintained network security protocols
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