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
Ans. 
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. BGP and ospf and vlan
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Q2. VSS and stacking switch
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Q1. BGP in depth ospf and vlan
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Q2. Vss and switch stacking switch routing
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It is online test. In this test there is question of apti and also coding and from 5g question.

There are two questions asked and time is enough to solve 60 minutes

Q1. Wap for palindrome number
Ans. 
A palindrome number is a number that remains the same when its digits are reversed.
• Convert the number to a string

• Reverse the string

• Check if the reversed string is equal to the original string
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Q2. Add two numbers by function
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Create a function to add two numbers
• Define a function that takes two parameters as input

• Inside the function, add the two numbers together and return the result

• Example: function addNumbers(num1, num2) { return num1 + num2; }
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Q3. Write a code for Binary search
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Binary search code implementation in Python
• Define a function that takes a sorted array and a target value as input

• Initialize two pointers, low and high, to the start and end of the array respectively

• While low is less than or equal to high, calculate mid as (low + high) // 2 and compare array[mid] with target

• If array[mid] is equal to target, return mid

• If array[mid] is less than target, update low to mid + 1

• If array[mid]...read more
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Q4. Wap for check your name is palindrome not
Ans. 
A program to check if a given name is a palindrome or not.
• Convert the name to lowercase to handle case-insensitivity

• Remove any spaces or special characters from the name

• Reverse the name and compare it with the original name to check for palindrome
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Q5. What is malloc and calloc function
Ans. 
malloc and calloc are functions in C programming used for dynamic memory allocation.
• malloc function is used to allocate a single block of memory of a specified size.

• calloc function is used to allocate multiple blocks of memory of a specified size, initialized to zero.

• Example: int *ptr = (int*)malloc(5 * sizeof(int));

• Example: int *ptr = (int*)calloc(5, sizeof(int));
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Q1. UST is good interviewer is not good
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Q2. Even we don't know the question atleast Interviewer required minimum patience .Iritating
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Q1. Basic question only OSPF
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Q2. Load balancer configuration
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Q1. OSPF, Load balancer
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Q2. Load balancing configuration
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Q1. Basics of CCNA and CCNP
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Q2. Difference between link state and DV. STP. BGP.
Ans. 
Link state and DV are routing protocols, STP is for loop prevention, BGP is for inter-domain routing.
• Link state protocols (e.g. OSPF) use Dijkstra's algorithm to calculate shortest path.

• Distance vector protocols (e.g. RIP) use Bellman-Ford algorithm and exchange routing tables.

• STP (Spanning Tree Protocol) prevents loops in Ethernet networks by blocking redundant paths.

• BGP (Border Gateway Protocol) is used for inter-dom...read more
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Q3. VLAN VTP OSPF EIGRP
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