NTT DATA, Inc. Senior Network Engineer Interview Questions and Answers

Q1. Experiance working
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Q2. Working projects
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Q1. 4 members were in interview. More on theory questions.
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Q1. Basic questions about yorself and package
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Q1. Explain BGP attributes and path selection process
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BGP attributes are used to determine the best path for routing. Path selection process involves comparing attributes like AS path, local preference, etc.
• BGP attributes include AS path, local preference, MED, origin, etc.

• Path selection process involves comparing attributes in a predetermined order to determine the best path.

• AS path attribute is used to prevent routing loops and determine the shortest path to a destinati...read more
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Q2. Asked question related to HSRP, STP, vlan, IPSec
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Q3. Did you worked on any firewall
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Yes, I have worked on configuring and managing firewalls in various network environments.
• Configured firewall rules to control traffic flow

• Managed firewall policies to ensure network security

• Troubleshooted firewall issues and implemented solutions

• Worked with different firewall vendors such as Cisco, Palo Alto, and Fortinet
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Q4. What need to be check if ospf neighborship is not forming
Ans. 
Check OSPF configuration, network connectivity, router IDs, subnet mismatches, authentication, and hello/dead timers.
• Verify OSPF configuration on both routers

• Check network connectivity between routers

• Ensure router IDs are unique

• Check for subnet mismatches

• Verify authentication settings

• Check hello and dead timers
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Q5. Explain SIA in eigrp
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SIA (Stuck In Active) is a mechanism in EIGRP to prevent routing loops by marking a route as 'stuck' if a feasible successor is not found.
• SIA occurs when a router is unable to find a feasible successor for a route during a topology change.

• During SIA, the router marks the route as 'stuck' and queries its neighbors for a new path.

• This prevents routing loops by temporarily blocking the affected route until a new feasible
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Q1. DHCP working principles
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DHCP assigns IP addresses to devices on a network automatically
• DHCP server assigns IP addresses to devices on the network

• DHCP clients request IP addresses from the DHCP server

• DHCP uses a lease mechanism to manage IP address assignments

• DHCP reduces the administrative burden of manually assigning IP addresses
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Q2. DNS working principles
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DNS is a system that translates domain names to IP addresses to locate resources on the internet.
• DNS resolves domain names to IP addresses

• DNS operates through a distributed database system

• DNS uses hierarchical structure with top-level domains like .com, .org, etc.

• DNS queries are resolved through recursive and iterative processes
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Q3. Scenario based question DHCP
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Q4. Spanning tree protocol
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Q1. Explain bgp , brief introduction of mpls , basic router command, etc
Ans. 
BGP is a routing protocol used to exchange routing information between different networks. MPLS is a protocol used for efficient data transfer. Basic router commands include show ip route, show interfaces, etc.
• BGP stands for Border Gateway Protocol and is used to exchange routing information between different networks.

• MPLS stands for Multiprotocol Label Switching and is used for efficient data transfer.

• Basic router com...read more
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Q1. Why should we hire you?
Ans. 
I have the necessary skills, experience, and passion for the job.
• I have a strong background in network engineering with experience in designing, implementing, and maintaining complex networks.

• I am proficient in various network technologies such as Cisco, Juniper, and Palo Alto.

• I have excellent problem-solving skills and can troubleshoot network issues quickly and efficiently.

• I am a team player and can work collaborativ...read more
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Q2. What is your family background?
Ans. 
My family background is diverse and multicultural.
• My parents are from different countries and cultures, which has given me a unique perspective on the world.

• Growing up, I was exposed to different languages, traditions, and customs.

• My family values education and hard work, which has motivated me to pursue a career in network engineering.
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Q3. Tell me about yourself.
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I am a network engineer with 5 years of experience in designing, implementing and maintaining complex networks.
• I have a Bachelor's degree in Computer Science

• I am proficient in Cisco and Juniper routers and switches

• I have experience in configuring firewalls and VPNs

• I am a team player and have excellent communication skills

• I am always eager to learn and keep up with the latest technologies
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Q4. Why are you looking for a change?
Ans. 
Looking for growth opportunities and to expand my skill set.
• Current job lacks opportunities for growth and learning

• Seeking a more challenging and dynamic work environment

• Interested in exploring new technologies and expanding my skill set
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Q5. What are your salary expectations?
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I am open to discussing a salary that is commensurate with my experience and the responsibilities of the role.
• I am looking for a fair and competitive salary based on industry standards and my qualifications.

• I am willing to negotiate and consider other benefits such as healthcare, retirement plans, and vacation time.

• I am open to discussing performance-based incentives and bonuses.

• I am aware of the salary range for this ...read more
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Q6. Share details of your previous job.
Ans. 
I worked as a Network Engineer at XYZ Company.
• Designed and implemented network infrastructure for multiple clients

• Configured and maintained network devices such as routers, switches, firewalls

• Troubleshot network issues and provided solutions to clients

• Managed network security and implemented security protocols

• Collaborated with cross-functional teams to ensure smooth network operations
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