HCLTech NOC Engineer Interview Questions and Answers

Q1. Tell me about yourself
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Q2. How was your last weekend
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Q1. OSI Network layers
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Q2. Routing protocols
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Q3. What’s VLAN and why can we use
Ans. 
VLAN stands for Virtual Local Area Network. It is used to logically segment a network to improve performance, security, and management.
• VLANs allow for better network performance by reducing broadcast traffic within a network segment.

• VLANs enhance network security by isolating sensitive data or devices from other parts of the network.

• VLANs simplify network management by allowing administrators to group devices based on ...read more
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Q1. BGP attributes and how they work
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BGP attributes are used to influence the path selection process in BGP routing.
• BGP attributes include AS_PATH, NEXT_HOP, LOCAL_PREF, etc.

• AS_PATH is a list of AS numbers that the route has traversed.

• NEXT_HOP is the IP address to reach the next hop towards the destination.

• LOCAL_PREF is used to influence outbound traffic.

• MED (Multi-Exit Discriminator) is used to influence inbound traffic.

• Weight is a Cisco-specific attribu...read more
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Q2. What to do if BGP goes down , how will you troubleshoot
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To troubleshoot BGP going down, check BGP neighbor status, analyze BGP routing table, verify BGP configuration, and check for any network connectivity issues.
• Check BGP neighbor status to see if the neighbors are up and if there are any flaps

• Analyze BGP routing table to identify any inconsistencies or missing routes

• Verify BGP configuration for any errors or misconfigurations

• Check for any network connectivity issues such
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Q3. OSPF formation each state
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OSPF formation involves states like Down, Init, 2-Way, Exstart, Exchange, Loading, Full.
• Down state: Initial state when OSPF process is not running.

• Init state: OSPF process is starting up.

• 2-Way state: Routers have exchanged hello packets and are now neighbors.

• Exstart state: Master and slave routers are determined.

• Exchange state: Database description packets are exchanged.

• Loading state: Link-state advertisements are exch...read more
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Q4. OSPF LSA types and which routes generates each LSA
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OSPF LSA types include Router LSA, Network LSA, Summary LSA, and ASBR Summary LSA.
• Router LSA (Type 1) - Generated by all routers and contains information about directly connected links.

• Network LSA (Type 2) - Generated by DR to advertise the network segment.

• Summary LSA (Type 3, 4, 5) - Generated by ABR to advertise routes to other areas.

• ASBR Summary LSA (Type 4) - Generated by ABR to advertise ASBR information to other
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Technical and project

Technical & project oriented

Q1. Salary and benefits..
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Q2. Salary and benefits
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Q1. About technical operations .
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Q2. What is your experience with Microsoft 365 and its documentation features?
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Q1. Can you describe your past work experiences?
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Q2. Your skills.
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Mental maths,problem solving

Q1. How will you face company problem
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Q2. By keeping adjustment and understanding with one another
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Q1. Why you choose my company
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Q1. Why you like this company
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Q1. How will you taggle your sudden struggle if you face
Ans. I will take decision priority wise
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Q1. Pls do interview schedule
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Q2. Html related questions
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Q3. Css related questions
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Q1. About IT and Security Domain
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