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Cisco TAC Engineer Interview Questions, Process, and Tips
Top Cisco TAC Engineer Interview Questions and Answers
- Q1. What are the new flags which RSTP BPDU's introduces?
- Q2. A user is unable to SSH the server, how do you troubleshoot this?
- Q3. What happens when you type google.com on your web browser?
Cisco TAC Engineer Interview Experiences
3 interviews found
Anonymous
I applied via Company Website and was interviewed in Jan 2023. There were 3 interview rounds.
(3 Questions)
- Q1. What are the new flags which RSTP BPDU's introduces?
- Ans.
RSTP BPDU introduces two new flags: TCN and Proposal.
TCN (Topology Change Notification) flag is used to indicate a topology change in the network.
Proposal flag is used to speed up the convergence process by allowing a switch to immediately transition to the forwarding state.
TCN flag is set by the root bridge and propagated to all switches in the network.
Proposal flag is set by a switch and sent to the root bridge.
Both ...
- Q2. A user is unable to SSH the server, how do you troubleshoot this?
- Ans.
To troubleshoot SSH issue, check network connectivity, firewall settings, SSH configuration, and user permissions.
Check if the server is reachable over the network
Verify if the SSH service is running on the server
Check if the firewall is blocking SSH traffic
Verify SSH configuration on the server
Check if the user has the necessary permissions to access the server
Check SSH logs for any errors or warnings
- Q3. Why ARP is used? Different types of ARP
- Ans.
ARP is used to map a network address (such as an IP address) to a physical address (such as a MAC address).
ARP stands for Address Resolution Protocol
It is used to resolve IP addresses to MAC addresses
There are two types of ARP: ARP Request and ARP Reply
ARP Request is used to find the MAC address of a device with a known IP address
ARP Reply is used to respond to an ARP Request with the MAC address of the device
ARP is im...
(3 Questions)
- Q1. What happens when you type google.com on your web browser?
- Ans.
When you type google.com on your web browser, it sends a request to Google's server and loads the website.
The browser sends a DNS request to resolve the domain name 'google.com' to an IP address
The browser establishes a TCP connection with Google's server
The browser sends an HTTP request to the server for the homepage of google.com
The server responds with the HTML code for the homepage
The browser renders the HTML code
- Q2. DNS query is resolved then TCP handshake and at last HTTP packets exchanged.
- Q3. Explain DORA process
- Ans.
DORA process is a four-step process used by DHCP to assign IP addresses to devices on a network.
DORA stands for Discover, Offer, Request, and Acknowledge.
Discover: The device sends a broadcast message to find available DHCP servers.
Offer: The DHCP server responds with an IP address offer.
Request: The device requests the offered IP address.
Acknowledge: The DHCP server acknowledges the request and assigns the IP address ...
Interview Preparation Tips
Skills evaluated in this interview
I applied via Job Portal and was interviewed in Jul 2021. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. How to motivate a customer if case is on Escalation edge ?
- Ans.
Motivating a customer on escalation edge
Show empathy and understanding of their frustration
Provide regular updates on the progress of the case
Offer solutions or workarounds to mitigate the issue
Highlight the importance of resolving the issue for their business
Escalate the case to higher management if necessary
Thank them for their patience and cooperation
- Q2. Try to bring the priority down of the said case and work internally and spend time with the customer more it will help you alot to find the solutions.
Interview Preparation Tips
I applied via Approached by Company and was interviewed before Sep 2021. There were 4 interview rounds.
(1 Question)
- Q1. ++In depth understanding of basic networking and troubleshooting
(1 Question)
- Q1. ++Spanning tree and Troubleshooting of switching network
- Ans.
Explanation of Spanning Tree Protocol and troubleshooting techniques for switching networks.
Spanning Tree Protocol (STP) is used to prevent loops in a network by blocking redundant paths.
Troubleshooting STP involves checking for blocked ports, incorrect root bridge selection, and misconfigured priority values.
Other common issues in switching networks include VLAN mismatches, port security violations, and broadcast stor...
(1 Question)
- Q1. ++Normal HR discussion
Interview Preparation Tips
++Be confident
++Learn basic understanding of the protocols in depth
Skills evaluated in this interview
What people are saying about Cisco
Interview questions from similar companies
Avinesh Singh
(1 Question)
- Q1. You Have a Data Stream and integers are coming at each second you have to identify the erroneous values.
I applied via Recruitment Consulltant and was interviewed in Aug 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Tell me about your previous company role ?
- Ans.
I was a software engineer responsible for developing and maintaining web applications for a financial services company.
Developed and maintained web applications using technologies such as Java, Spring, and Angular
Collaborated with cross-functional teams to gather requirements and deliver solutions
Participated in code reviews and testing to ensure high quality software
Implemented new features and enhancements to improve
- Q2. Willing to join Arista ?
- Ans.
Yes, I am willing to join Arista as a Software Engineer.
I am excited about the opportunity to work at Arista and contribute to their innovative projects.
I have researched the company and believe that my skills align well with their values and goals.
I am confident that I can make a positive impact on the team and help drive success at Arista.
One Hr interview with 3-4 coding questions on strings,array and linked list
I applied via LinkedIn and was interviewed in Oct 2021. There were 2 interview rounds.
(1 Question)
- Q1. Javascript / UI related
SYSTEM Design
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Jan 2022. There were 4 interview rounds.
It's a one hour coding test which tests basic problem solving skills.
(1 Question)
- Q1. In this round interviewer tests your problem solving skills, you will be given a link to a coding platform and will be asked to solve couple of problems (1- easy, 2- medium). Approach will be considered ra...
(1 Question)
- Q1. This will test your technical skills for the domain you have been shortlisted for
(1 Question)
- Q1. It's kind of a behavioural round which targets your previous experiences and your exposure
Interview Preparation Tips
I applied via LinkedIn and was interviewed in Mar 2024. There were 2 interview rounds.
Question from Strings and Question from Linked Lists
(2 Questions)
- Q1. What are double pointers ?
- Ans.
Double pointers are pointers that store the memory address of another pointer.
Double pointers are used in C and C++ to store the address of a pointer variable.
They are commonly used in functions to modify the value of a pointer passed as an argument.
Example: int **ptr; // declares a double pointer to an integer pointer.
- Q2. Discuss OOPS in Programming.
- Ans.
OOPS stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
OOPS focuses on creating objects that contain both data and methods to manipulate that data.
Encapsulation, inheritance, and polymorphism are key principles of OOPS.
Example: Inheritance allows a class to inherit properties and methods from another class, promoting code reusability.
Skills evaluated in this interview
Selected
I applied via Campus Placement and was interviewed before Jan 2023. There were 3 interview rounds.
3 coding questions; 1 was of Trie, 1 was greedy and another was related to OOPs, and high level data structures
(1 Question)
- Q1. Based on resume, technical skills.
(1 Question)
- Q1. Again Technical skills and CS subjects knowledge
(1 Question)
- Q1. Questions around software design
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Cisco TAC Engineer Interview Process
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