Preparing for SRE Interviews
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1. Intro to SRE role 2. SRE vs DevOps vs SDE 3. How to prepare for SRE interviews ? 4. What specific skills to acquire for working as a SRE ? 5. How should we start our career as SRE straight out of college? 6. Study materials that can help
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Preparing for SRE Interviews
- 1. PREPARING FOR A SRE INTERVIEW DO NOT FORGET TO SUBSCRIBE
- 2. CONTENT Intro to SRE role SRE vs DevOps vs SDE Preparing for SRE interviews Study materials
- 3. INTRO TO SRE
- 5. • SDE write code for developing features/products • Messaging feature – writing API, using databases, how to scale • SRE should get involved at the designing stage – RFC • SRE will make sure that we have enough capacity to serve new traffic • Make sure that we have a monitoring/alerts set up for the new service • Make sure we have a service document • A oncall team is assigned for the service • Conduct postmortems for incidents
- 6. 50% ENGINEERING WORK + 50% OPERATIONS
- 10. • In many org, SDE may be also handling SRE tasks • Fine if the service is not critical • Becomes an issue if service handles large traffic • SDE needs to do the SRE work along with developing features • Becomes important to have a separate SRE/DevOps team
- 12. SKILLS REQUIRED FOR A SRE
- 14. PROGRAMMING • 50% Engineering work • Automation • Python, Bash, Go • You can give this round in any language – c, c++, java etc • Basic DSA + Algorithms • Practice • My basic python course - https://www.youtube.com/playlist?list=PLfZFg1aj82StXIWk29U4aHq0yJudQo ASW
- 15. Linux Operating System • Basic linux commands • ls, cd, pwd • grep, awk • changing file permissions • Basic of OS • Process creation and management • Multithreading • Memory management • https://www.edx.org/course/introduction-to-linux • https://courses.edx.org/courses/course- v1:RedHat+RH066x+2T2017/course/ • http://linuxcommand.org/lc3_learning_the_shell.php • https://www.youtube.com/playlist?list=PLhqPDa2HoaAYAEBJLU8-yNzq- HHDTLVWO
- 16. Computer Networking • TCP/IP protocol • Application layer protocols – HTTP, HTTPS, SSL, SSH, DNS • Transport layer – port numbers, 3 way handshake, TCP vs UDP • Network layer – IP addresses, subnet, routing basics • Data link layer – Mac address Linux networking commands – ping, telnet, traceroute, dig, ifconfig https://www.youtube.com/playlist?list=PL7zRJGi6nMRzHkyXpGZJg3KfRSCrF1 5Jg
- 17. SYSTEM DESIGN BASICS • High level system design • Load balancer, web servers, DNS, CDN, Caching, Database, Reverse proxy, CAP theorem • Horizontal vs vertical scaling • Design high level design for twitter • https://github.com/donnemartin/system-design-primer
- 19. FRESHERS • Programming, Linux operating system and Computer networking • Basics of high level system design • Not many companies hire freshers in SRE/DevOps • Varies from company to company • Depends on their requirement • Knowledge about AWS, Jenkins, Kubernetes etc
- 20. EXPERIENCED • Programming, Linux operating system and Computer networking • Good knowledge of system design • System debugging – site down, site slow • Designing monitoring for services • Depending on the company requirements • Good knowledge of mysql, Hadoop, Jenkins, Kubernetes, AWS, docker etc
- 21. Additional resource for interview preparation https://github.com/mxssl/sre-interview-prep-guide
- 22. NEXT ON THIS CHANNEL • Computer Networking • Linux fundamentals • System design • SRE • Interview questions • Companies that hire SRE/DevOps
- 23. QUESTIONS ?