Airtel Africa Senior Engineer Interview Questions and Answers

Sdwan, osi layer tcp ,udp,ip addressing,

Q1. SDWAN, ip addressing ,subnetting, osi modle
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Q1. Basic Technical
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Q1. Core Technical/3gpp/ scenario based
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Q1. Technical/General discussion
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Q1. Salary discussion
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Q1. Data Structures and algorithms
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Q1. Dsa java angular
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Q2. Sql queries and db related questions
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Q1. Case study details
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Q1. Basic questions
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Q1. Question on Linked-list 1. Reverse the single linked-list. 2. Add node at last and front of linked-list. 3. Stack questions. 4. 3gpp spec questions. MAC/RLC/PDCP
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Q1. 1. Salary expectation 2. How you handle pressure in tough situations.
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Discussing about troubleshooting process in NOC.

Q1. GPON, DWDM, Switch.
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Q1. What is vrrp and harp and how it functions?
Ans. 
VRRP (Virtual Router Redundancy Protocol) and HARP (High Availability Redundancy Protocol) are protocols used for providing redundancy in network routing.
• VRRP is used to provide a virtual IP address that multiple routers can share, ensuring high availability in case of router failure.

• HARP is a proprietary protocol developed by Cisco that also provides redundancy by allowing multiple routers to share a virtual IP addres...read more
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Q2. What is router and firewall and state difference?
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A router is a networking device that forwards data packets between computer networks, while a firewall is a security system that monitors and controls incoming and outgoing network traffic.
• Router directs traffic between different networks based on IP addresses.

• Firewall filters network traffic based on predetermined security rules.

• Routers operate at layer 3 (network layer) of the OSI model, while firewalls operate at la...read more
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Q3. What is dwdm and it's components?
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DWDM stands for Dense Wavelength Division Multiplexing, a technology used in fiber optic communications.
• DWDM is a technology that allows multiple data signals to be transmitted simultaneously over a single fiber optic cable.

• Components of DWDM include lasers, multiplexers, demultiplexers, optical amplifiers, and dispersion compensators.

• DWDM systems use different wavelengths of light to carry multiple data streams, incre...read more
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Q4. Osi reference model explanation?
Ans. 
The OSI reference model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven distinct layers.
• The OSI model stands for Open Systems Interconnection model.

• It helps in understanding how different networking protocols work together.

• Each layer has specific functions and communicates with adjacent layers.

• Examples of layers include physical layer, data link layer, net
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Q1. What is mean by testing
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Testing is the process of evaluating a system or component to determine if it satisfies specified requirements.
• Testing is done to identify defects or errors in software or hardware.

• It involves executing a system or component with the intent of finding bugs or verifying its functionality.

• Testing can be performed at various levels such as unit testing, integration testing, system testing, and acceptance testing.

• Different...read more
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Q2. Why we are doing testing
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Testing is done to ensure that the software meets the requirements and is of high quality.
• To identify defects and errors in the software

• To ensure that the software meets the specified requirements

• To improve the quality of the software

• To increase customer satisfaction

• To reduce the risk of software failure

• To ensure that the software is reliable and secure
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. Share details of your previous job.
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Q4. What are your strengths and weaknesses?
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Q5. Tell me about yourself.
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Q1. Mpls BGP AD valu Attribute of bgp How you will troubleshoot Valid vlan
Ans. 
Questions related to MPLS, BGP, VLAN and troubleshooting techniques for BGP
• MPLS is a protocol used for efficient packet forwarding in a network

• BGP AD value is used to determine the best path for routing traffic

• BGP attributes include AS path, next hop, local preference, etc.

• Troubleshooting BGP involves checking for configuration errors, checking BGP neighbor status, checking routing tables, etc.

• Valid VLANs are those tha...read more
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Q2. STP RSTP VLAN Trunks port
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