Unitedlayer Senior Infrastructure Engineer Interview Questions, Process, and Tips

The 2 default records in DNS are A record and NS record.

• A record (Address record) maps a domain name to an IP address

• NS record (Name Server record) specifies the authoritative name servers for the domain

Default FT (Fault Tolerance) is not allowed on ESXi host

• Default FT is not allowed on ESXi host due to licensing restrictions

• FT feature needs to be enabled and configured separately

• FT is only available in VMware vSphere Enterprise Plus edition

To login to an ESXi host during lockout, use the DCUI or SSH.

• Use the Direct Console User Interface (DCUI) to login during lockout.

• Alternatively, enable SSH access and login remotely using an SSH client.

• Resetting the root password may also be necessary in some cases.

TTL (Time to Live) determines the duration a DNS record is cached before it expires.

• TTL is set by the domain owner in the DNS record

• Common TTL values range from a few minutes to 24 hours

• Shorter TTLs are useful for frequently changing records like load balancers

• Longer TTLs reduce DNS query traffic and improve performance

VMDX is a virtual disk descriptor file used in VMware virtualization technology. OCS stands for Office Communications Server.

• VMDX is a file format used to describe virtual disks in VMware virtualization technology

• It contains metadata about the virtual disk, such as size, type, and location

• OCS (Office Communications Server) is a deprecated Microsoft software product for unified communications

• It provided instant messagin...read more

Profile group in HA refers to a collection of profiles that are grouped together for high availability purposes.

• Profile group ensures that multiple profiles are active and available for redundancy in case of failure

• Profiles within a group can be configured to failover to another node in the cluster

• Helps in ensuring continuous availability of services by distributing workload across multiple profiles