Jio Intracity Fiber Engineer Interview Questions and Answers

Round duration - 30 Minutes
Round difficulty - Easy

In this round, Interviewer tried to judge if my basics are clear or not. 
He focused majorly on CS fundamentals.
He was pretty cooperative and gave me time after asking questions.

Q1. Have you ever solved a complex Java problem on your own?
Ans. 
Yes, I have solved a complex Java problem on my own.
• I once had to optimize a large-scale Java application by implementing multithreading to improve performance.

• I successfully debugged a memory leak issue in a Java program by analyzing heap dumps and identifying the root cause.

• I designed and implemented a custom data structure in Java to efficiently solve a specific problem.
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Q2. 
N-th Fibonacci Number Problem Statement
Given an integer ‘N’, your task is to find and return the N’th Fibonacci number using matrix exponentiation.
Since the answer can be very large, return the answer ...read more
Ans. 
The task is to find the Nth Fibonacci number using matrix exponentiation and return the answer modulo 10^9 + 7.
• Implement a function to find the Nth Fibonacci number using matrix exponentiation.

• Return the answer modulo 10^9 + 7 to handle large values.

• Use the formula F(n) = F(n-1) + F(n-2) with initial values F(1) = F(2) = 1.

• Optimize the solution to achieve better than O(N) time complexity.

• Consider solving the problem us...read more
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Q3. 
Swap Kth Elements in an Array
Given an array ARR of size N, perform the operation to swap the Kth element from the beginning with the Kth element from the end of the array.
Example:
Input:
N = 5, K = 2
...read more
Ans. 
Swap Kth elements in an array with given constraints.
• Create a function that takes the array, K value, and size of the array as input

• Swap the Kth element from the beginning with the Kth element from the end

• Handle edge cases like K being out of bounds or array size being less than 2
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Round duration - 30 minutes
Round difficulty - Medium

It was in late evening, interviewer was quite cool and asked me quite basic things about myself.

Q1. 
Covid Vaccination Distribution Problem
As the Government ramps up vaccination drives to combat the second wave of Covid-19, you are tasked with helping plan an effective vaccination schedule. Your goal is...read more
Ans. 
Given constraints and rules, maximize vaccines administered on a specific day during a vaccination drive.
• Iterate through each test case and calculate the maximum number of vaccines administered on the specified day.

• Distribute the available vaccines evenly across the days while adhering to the rules.

• Ensure that the sum of vaccines administered does not exceed the maximum allowed.

• Maximize the vaccines administered on the
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Q1. BGP MPLS QOS OSPF
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Q2. Work profile in last company
Ans. 
I worked as a Senior Engineer in my previous company.
• Led a team of engineers in developing and implementing new software solutions

• Collaborated with cross-functional teams to ensure project success

• Designed and implemented scalable and efficient code

• Participated in code reviews and provided constructive feedback

• Mentored junior engineers and facilitated their professional growth
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Q1. Salary discussion for role
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2 levels of interview asked on Java Spring boot

2 levels of interview asked on java spring

Q1. Basic concepts of VOIP and trunk configuration. Need to know ongoing voip trends in the market. Teams is budding platform and would be great to have Skype for business background
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Q1. Why do you want to join Tata?
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60 minutes 60 aptitude and logical reasoning questions questions

Q1. Can you write a program to demonstrate soccket programming
Ans. 
Yes
• Socket programming is a way to establish communication between two computers over a network using sockets.

• It involves creating a socket, binding it to an IP address and port, listening for incoming connections, and sending/receiving data.

• Examples of socket programming include creating a chat application, a file transfer program, or a web server.
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Q2. What do you know about ipv4 vs ipv6,ip masking and more computer network related stuff
Ans. 
IPv4 and IPv6 are internet protocol versions. IP masking is a technique to hide IP addresses.
• IPv4 is the fourth version of the Internet Protocol, while IPv6 is the sixth version.

• IPv4 uses 32-bit addresses, allowing for approximately 4.3 billion unique addresses.

• IPv6 uses 128-bit addresses, providing a significantly larger address space.

• IP masking, also known as IP anonymization, is the process of hiding the IP address ...read more
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