Ericsson Senior RF Engineer Interview Questions and Answers

Q1. What is networking
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Q2. Explain in detail OSI model
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Q3. What is switch and routers
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Q1. WHAT IS QCI ? explain QCI7 !
Ans. 
QCI stands for QoS Class Identifier, a parameter used in LTE networks to differentiate between different levels of service quality. QCI7 is used for Internet of Things (IoT) applications.
• QCI stands for QoS Class Identifier in LTE networks

• It is used to differentiate between different levels of service quality

• QCI7 specifically is used for Internet of Things (IoT) applications
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Q2. What is MME Drop and eNodeB Drop in LTE ?
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MME Drop and eNodeB Drop in LTE refer to the loss of connection between the mobile device and the network due to various reasons.
• MME Drop refers to the loss of connection between the mobile device and the Mobility Management Entity (MME) in LTE network.

• eNodeB Drop refers to the loss of connection between the mobile device and the eNodeB (base station) in LTE network.

• These drops can occur due to factors such as poor sig...read more
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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. Diploma cse Lileted
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Q2. Osi model network
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Q3. Computer ke Leleted
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Q4. Production quality
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Q5. Computer basic excel
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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
Ans. 
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. 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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