Vodafone Idea Packet Core Engineer Interview Questions and Answers

Q1. Tell about yourself, day to day work, lte call flow with interface and protocol, diameter protocol,default bearer, dedicated bearer, Gbr and Non Gbr, qci, pgw-sgw selection, modify bearer, Apn, Dns, tai, p...read more
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Q1. Basic questions on antenna parameters.
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Q2. Design aspects of Antenna array.
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Antenna array design involves elements such as element spacing, beamforming techniques, and array geometry.
• Element spacing determines the directivity and beamwidth of the array.

• Beamforming techniques like phase shifting and amplitude tapering help steer the beam in a desired direction.

• Array geometry, such as linear, planar, or conformal arrays, affects the radiation pattern and polarization.

• Antenna array design also co...read more
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Q1. Theoretical understanding on base station antenna.
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Q2. How will you get the tilt in the base station antenna?
Ans. 
The tilt in the base station antenna can be adjusted by physically changing the angle of the antenna.
• Tilt can be adjusted by loosening the bolts on the antenna mount and manually changing the angle of the antenna

• Specialized tools like tilt meters can be used to ensure the correct angle is achieved

• Remote electrical tilt (RET) systems can also be used to adjust the tilt of the antenna electronically
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Q1. 1.what is the port no used by DHCP?
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The port number used by DHCP is 67 (server) and 68 (client).
• Port 67 is used by DHCP server to listen for client requests

• Port 68 is used by DHCP client to send requests to the server

• DHCP uses UDP protocol for communication
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Q2. 2.OSPF states ? 3.VTP Pruning? 4.what is DHCP? 5.what is Reverse ARP and how it is different from DHCP?
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Q3. 3.They will give you Ip address and mask you need to tell the pools of Ip's?
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Q4. 4.What is ISIS and MDLS
Ans. 
ISIS and MDLS are protocols used in networking for routing and network management.
• ISIS (Intermediate System to Intermediate System) is a routing protocol used to exchange routing information between network devices.

• MDLS (Management Data Input/Output Link Service) is a protocol used for network management tasks such as monitoring and configuration.

• ISIS is commonly used in large enterprise networks and internet service p...read more
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Q1. Be honest with your years of experience. All information you share will be verified at the time of joining.
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Second round is aptitude test

Q1. Tel me about your company and introduce yourself
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Questions about networking and English

Q1. Questions about technical knowledge of network
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Q2. What is arp? What is HSRP? WHAT IS GLBP? WHAT IS NAT
Ans. 
ARP is a protocol used to map an IP address to a physical MAC address on a local network.
• ARP stands for Address Resolution Protocol.

• It operates at the Data Link Layer of the OSI model.

• ARP is used to resolve IP addresses to MAC addresses.

• It is essential for communication between devices on the same network.

• ARP requests are broadcasted to all devices on the network.

• Example: When a computer wants to send data to another d...read more
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Q1. Why nokia and why this job
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Nokia is a global leader in telecommunications technology and I am passionate about RF engineering, making this job a perfect fit for me.
• Nokia is a renowned company with a strong reputation in the telecommunications industry

• I have a deep interest in RF engineering and Nokia offers opportunities to work on cutting-edge technologies in this field

• The company's commitment to innovation and continuous learning aligns with m
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Q2. Some basic fundamental questions from theory
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Q1. I got a new job from Naukri.com itself. Thank you very much Our skills were asked related to the same. Devloped your skills
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Q1. Interviewer asked about skills
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Q2. Prepare role and responsibilities
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Q1. Experience,CTC, Notice period etc
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Q2. Group discussions about works
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Q1. Different n/w layers
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Different network layers include physical, data link, network, transport, session, presentation, and application layers.
• Physical layer: responsible for transmitting raw bits over a communication channel

• Data link layer: responsible for error-free transfer of data between nodes on a network

• Network layer: responsible for routing data packets between networks

• Transport layer: responsible for reliable data transfer between a...read more
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Q1. Firewall works on what layers
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Firewall works on multiple layers of OSI model
• Firewall operates on layers 3 (network layer) and 4 (transport layer) of the OSI model

• It can filter traffic based on IP addresses, ports, protocols, and other criteria

• Firewalls can also perform deep packet inspection to detect and block malicious traffic

• Examples of firewall software include Cisco ASA, pfSense, and Windows Firewall
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