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= Topics =

= Preparations =
 * 1st round
 * 1st Week Dec starting

coding tech communication thinking
 * Video interview

1st Troubleshooting code Distributes system Web & Network technologies
 * 1 Hour:

2 tech Networking/General Web troubleshooting 1 manager
 * F2F - Bangalore office


 * Share use cases
 * Working with Code (15 min)
 * What is code, Issue & How to improve it.


 * Ask question about question
 * Break it down


 * No IDE
 * No library

= Topics 2 =


 * Semaphores
 * Mutex
 * Threads

= Questions =

Port Isolation Vlan Isolation Loopback Detection
 * What are alternative solutions of Spanning tree?

200ms latency -> initial rto by most OSs Do not consider normal Retransmissions, but only RTOs exponential backoff rto will double with each iteration -> 400ms, 800ms, 1000ms congestion, pathmtu not honored, icmp rate-limited, reply pathmtud-reply packets dropped, os issues -> Zero window -> cpu high(response slow), memory high, disk issue
 * Tail Latency

RTP uses tcp, n/w level issues, check latency on which side traces,
 * 4k video file edit latency

= Networking Followup =

1MBPS speed? whats wrong multiple streams pearing latency congestion BW/Delay product BDP TCP Window size Packet capture
 * 1) Moving of files BW APAC & EMEA

GCP VM timed out
 * 2) SSH to remote server

Past system design you have done trade off you made in this scaling this specific network 3-tier network design in public cloud. How do you diesgn Will you need LB? Why?
 * 3) System Design

VPN tunnel? How do you ensure High Availabiltiy for this?
 * 4) How can you establish secure connectivity to public cloud

Room for improvement?
 * 5) Re-Evaluate the design?