Ericsson Solution Architect Interview Questions and Answers

To resolve a pending volume attachment issue, check instance status, volume state, and logs for errors.

• Verify the instance status: Ensure the instance is running and not in a stopped or terminated state.

• Check volume state: Use cloud provider tools to confirm the volume is available and not in an error state.

• Review logs: Look at the instance and volume logs for any error messages that could indicate the cause of th...read more

AAA and AAAA queries are DNS queries used to retrieve IPv4 and IPv6 addresses respectively.

• AAA query is used to retrieve IPv4 address of a domain name.

• AAAA query is used to retrieve IPv6 address of a domain name.

• AAA and AAAA queries are part of DNS (Domain Name System) protocol.

• AAA and AAAA records are stored in DNS servers.

• Example: AAA query for google.com will return 172.217.166.142.

• Example: AAAA query for googl...read more

To design scalable and reliable distributed applications, consider factors like load balancing, fault tolerance, and data partitioning.

• Use load balancers to distribute traffic evenly across multiple servers

• Implement fault tolerance by replicating data and services across multiple nodes

• Partition data to distribute it across multiple nodes and avoid bottlenecks

• Use caching to reduce the load on the database

• Implement ...read more

APN redirection, 3GDT, MME/SGSN pooling, APN configuration, and SBA in 5G are topics related to mobile network architecture.

• APN redirection is the process of redirecting a user's data traffic to a different Access Point Name (APN) than the one originally requested.

• 3GDT stands for 3G Direct Tunneling, which allows for direct communication between the User Equipment (UE) and the Serving Gateway (SGW) without going t...read more

Kubernetes is an open-source container orchestration platform that automates deployment, scaling, and management of containerized applications.

• Pods are the smallest deployable units in Kubernetes, while VMs are complete virtual machines with their own operating system and hardware resources.

• Types of services in Kubernetes include ClusterIP, NodePort, LoadBalancer, and ExternalName.

• 4G and 5G are different generatio...read more

Call flows of Charging systems involve the process of charging customers for services rendered.

• Call initiation by customer

• Validation of customer details

• Calculation of charges based on usage

• Application of discounts or promotions

• Payment processing

• Confirmation of successful payment

Charging system architecture involves components like charging stations, billing systems, and user interfaces.

• Charging system typically consists of charging stations where users can plug in their devices.

• Billing systems track usage and calculate charges based on factors like time and energy consumption.

• User interfaces allow users to monitor charging status and make payments.

• Integration with payment gateways for se...read more