How would you build the most available service for calculating a number with an unlimited budget? What technologies would you use, where would you deploy, and how would you collect metrics?
Senior
230
DevOps
The binary tries to bind to port 80, but it is already occupied by nginx. How to run this binary?
Senior
168
How would you split Ansible roles for nginx, WordPress, and Joomla if different servers have different service combinations?
Senior
162
Which packets will go where during a network request? What will be the source and destination MAC addresses when sending a request to 8.8.8.8?
Senior
159
What types of DNS records exist? What is the purpose of a PTR record?
Senior
157
Which memory metric is important for server monitoring? When should alerts be triggered?
Senior
156
What is system and user in the context of CPU time? How do they differ? If an application calculates the number π, which parameter will grow?
Senior
152
Using what mechanism in Ansible can you split runs and not execute some tasks during a regular run?
Senior
145
What happens during a network request to [link]? Describe the DNS resolution process.
Senior
145
We sent a request to port 8888. Is this TCP/UDP — which OSI layer?
Senior
144
How do system calls (syscalls) work in Linux? What are userspace and kernelspace?
Senior
141
How to manage the OOM Killer in Linux so that the database is never killed? Which parameter is responsible for this?
Senior
139
What permissions are needed for a file to run in Linux? How does the permission check mechanism work before execution?
Senior
137
What types of probes are available in Kubernetes (liveness, readiness, startup)? What is each for, and what happens when they trigger?
Senior
136
How do you monitor disk subsystem load? What utilities do you use and what do you pay attention to?
Senior
130
How to see which system calls are being executed by a running application?
Senior
123
Where are binary files located in Linux? How to find a compiled binary placed in /opt?
Senior
121
Describe the process of establishing a TCP and TLS connection when making an HTTP request.
Senior
116
How would you balance traffic between multiple clouds? What technologies would you use to build a global load balancer?
Senior
114
What happens when you enter [link] in a Linux terminal from the system, network, and OSI layers perspective?
Senior
111