VIS Networks Network Engineer Interview Questions and Answers

Online hackerrank test

Online hacker rank test

Q1. Technical one on one round related to projects and technologies
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Q2. Projects and programming language related ds algo
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Q1. Managerial round
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Q2. Basic everyday situation questions
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Q1. Final hr round salary etc
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Round duration - 70 Minutes
Round difficulty - Hard

It started around 11 Am on MS teams.
There was only 1 interviewer.
The interviewer asked questions from almost every concept, whatever I mentioned in my resume.

Data Structure and Algorithms: Complete heap Sort(Full code on pen and paper), check a number is a power of 2 or not, and some follow-up questions on data structure and algorithms.

OS: Scheduling algorithms, Round Robin(implementation), Process States, and some follow-up questions on that also.
OOPS: Virtual Functions, Copy Constructors, Runtime Polymorphism, Destructors with their implementation, and lots of follows up questions on that also. They gave more focus on oops concepts in c++ only. If you know oops concepts in c++ then you should be able to explain them well with proper implementation.
Project: Complete description, Database schema(Complete diagram on paper), Data flow diagram, and which technology used in projects. My project was on spring boot based web application with proper database design. They asked many questions related to the flow of the project and request methods(POST, PUT, UPDATE, DELETE).
And some other basic questions on projects as well. The duration of this round was almost a complete hour. 7 students shortlisted after 1 round.

Q1. 
Heap Sort Problem Statement
Your task is to sort an array of integers in non-decreasing order using the Heap Sort algorithm.
Input:
The first line contains an integer 'T' denoting the number of test cas...read more
Ans. 
Heap Sort is used to sort an array of integers in non-decreasing order by creating a max heap and repeatedly extracting the maximum element.
• Create a max heap from the input array.

• Swap the root (maximum element) with the last element and reduce the heap size.

• Heapify the root element to maintain the heap property.

• Repeat the above steps until the heap size is 1.

• The array will be sorted in non-decreasing order.
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Q2. 
Ninja's Pattern with Powers of 2
Ninja, who loves playing with numbers, sets out to arrange numbers within 'N' rows. The unique arrangement follows these rules: the first row contains 1 number, the second...read more
Ans. 
Generate a pattern of numbers in rows following a powers of 2 sequence with numbers 1 to 9, recycling back to 1.
• Start with 1 number in the first row, 2 numbers in the second row, 4 numbers in the third row, and so on following powers of 2.

• Fill the pattern with numbers from 1 to 9, recycling back to 1 after reaching 9.

• Output the pattern for the given number of rows 'N'.

• Example: For N = 4, the pattern would be 1, 2 3, 4
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Q1. Basic python questions
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Q1. About your profile and project.
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Basic Servicenow questions.
Client side server side best practices.

Basic serivicenow knowledge check.

Hands on PDI. Or on any instance.
Fixing the existing code.
Detailed discussion on technical experience

Q1. Techno managerial.
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Q2. Why telstra and preferred location
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Easy and average coding ques and oops concepts

Q1. Asked abt resume and some oops concepts
Ans. I next mr round asked resume projects and given sql scenario
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Q2. Hr round simply abt ourslf
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A Hacker rank test was trigerred

Q1. Reverse a string
Ans. 
Reverse a given string
• Use a loop to iterate through the characters of the string

• Swap the characters from start to end of the string

• Repeat until the entire string is reversed
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Q2. Move zeros in an array
Ans. 
Move all zeros to the end of an array of strings
• Iterate through the array and keep track of the index to place non-zero elements

• After iterating, fill the remaining indices with zeros
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Q1. Osi layer, ip , epon and gpon
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Q2. Osi layer,ip, epon and gpon
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Q3. Osi layer, ip, epon and gpon
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Q4. Mac work on which layer?
Ans. 
Mac works on the Data Link layer.
• Mac stands for Media Access Control.

• It operates on the Data Link layer of the OSI model.

• Responsible for the addressing of devices on a network.

• Examples include Ethernet MAC addresses.
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Q5. Ip work on which layer?
Ans. 
IP works on the network layer (Layer 3) of the OSI model.
• IP stands for Internet Protocol.

• It is responsible for routing packets across different networks.

• IP addresses are unique identifiers assigned to devices on a network.

• Examples of IP versions include IPv4 and IPv6.
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Q6. What is epon and gpon
Ans. 
EPON and GPON are types of passive optical networks used for delivering telecommunications services.
• EPON stands for Ethernet Passive Optical Network and uses Ethernet technology for data transmission.

• GPON stands for Gigabit Passive Optical Network and offers higher bandwidth and longer reach compared to EPON.

• Both EPON and GPON are used for delivering high-speed internet, VoIP, and IPTV services to subscribers.

• EPON is m...read more
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Q7. What is ARP? what is pon
Ans. 
ARP stands for Address Resolution Protocol, used to map IP addresses to MAC addresses. PON stands for Passive Optical Network, a type of fiber-optic network.
• ARP is used to resolve IP addresses to MAC addresses on a local network

• ARP operates at the data link layer of the OSI model

• PON is a type of fiber-optic network that uses passive optical splitters to serve multiple users
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Q1. What is subnetting and router work on which layer
Ans. 
Subnetting is the process of dividing a network into smaller subnetworks. Routers operate at the network layer (Layer 3) of the OSI model.
• Subnetting involves creating multiple smaller networks from a single larger network by dividing the IP address range.

• It helps in efficient utilization of IP addresses and improves network performance by reducing broadcast traffic.

• Routers operate at the network layer (Layer 3) of the ...read more
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Q2. Lan card work on which layer?
Ans. 
Lan card works on the Data Link layer of the OSI model.
• Lan card operates at Layer 2 of the OSI model, which is the Data Link layer.

• It is responsible for the physical addressing of devices on the network.

• Examples of Lan cards include Ethernet cards and wireless network adapters.
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Q1. What is BGP community
Ans. 
BGP community is a way to group BGP routes and apply policies to them based on common attributes.
• BGP community is a 32-bit numerical value attached to BGP routes.

• It can be used to group routes based on common attributes such as geographic location, customer type, or service level.

• Network operators can use BGP communities to apply routing policies, such as controlling route propagation or setting local preference.

• Commun...read more
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