The write erase boot command option deletes the startup configuration and enables zero touch provisioning (ZTP). This is used to reset the switch to its default state and prepare it for automated configuration through ZTP.
References:
* Dell Technologies SONiC Command Reference Guide
* Switch Configuration Guide

* Configure the access mode for the switch port (A): This involves setting the switch port to operate in access mode.
* Remove the current access VLAN configuration (D): Before changing the VLAN, the current configuration must be cleared.
* Enter it into the relevant interface (E): Apply the new configuration to the specific interface, Eth1/10.
Steps:
* interface Ethernet 1/10
* no switchport access vlan <current VLAN> (Remove current VLAN)
* switchport mode access
* switchport access vlan 40
References:
* Dell Technologies SONiC documentation
* Dell Networking Configuration Guide

The QSFP28 ports on an S5248F switch support multiple modes, including 1x100G, 1x40G, 2x50G, and
4x25G. These modes provide flexibility in network design and enable the switch to support different types of network connections and bandwidth requirements.
References:
* Dell S5248F Switch Data Sheet
* Dell Technologies InfoHub

When RDMA over Converged Ethernet (RoCE) is enabled, Enhanced Transmission Selection (ETS) and Priority Flow Control (PFC) are two key elements that need to be configured. ETS allows for bandwidth allocation among different traffic classes, and PFC provides lossless Ethernet operation for specific traffic classes to support low-latency, high-performance network communication.
References:
* Dell Technologies SONiC documentation
* RDMA over Converged Ethernet Configuration Guide

Based on the exhibit, Router-2 has the highest priority (90) in VRRP group 10. In VRRP, the router with the highest priority becomes the primary (master) router. Therefore, Router-2 is the primary VRRP router for VRRP group 10.
References:
* Dell Technologies SONiC VRRP Configuration Guide
* VRRP Protocol Overview