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interview_questions
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#### interview questions for devops/devsecops ####
#### This consists of compiled list of questions being interviewed for DevOps/DevSecOps with
mnc's,startups, small companies like tech mahindra, autodesk, eatigo, juvo, jump trading, singtel ,
infosys, zalora, lazada, st electronics, chainstack, Hp, palo IT and various others. ####
### TOPICS #########
1) Jenkins 2.0
2) application server, webserver
3) docker
4) git
5) aws, private cloud
6) monitorung tools , scripts
7) maven, build tools
8) linux basics & advanced
9) networking
10) shell/python scripting
11) DB mongo/mysql
12) security
13) automation
14) os concepts
#####################
1)how to see kernel of os and architecture ?
2) which one is better redhat ubuntu aix etc. why ?
3) trendmicro how it works ? trend micro dashboard name ?
4) system manager how it works ?
is it safe to use sytem manager to upgrade / update os ? intevriewer didnt feel so?
5) ci/cd tool, phases, example of static & dynamic anaylsys pluggins ?
6) which linux is the best and shy ? need to know booting wise ?
7) python ,unix scritping , how good ?
8) kernel cmd line parameters ?
9) special file system ?
10) data types in python ?
11) list and dictionary ?
12) file types in linux ?
13) iam ?
14) flow from enduser to webpage hit explain ?
15) vpc peering ?
16) ec2 roles how why ?
17) sqs, sns ?
18) boot sequence of linux os ?
19) how ls command works, tell the story behind ?
20) ls -ltrh full cmd explain ?
21) find a file in millions of file in a directory how ?
22)rolling deployment in ansible how ?
23)terraform usage , how to check current state ? how to do dry run ?
24)tcp/ip & udp model ?
25)rack space ? raid configure ?
26)vmware ? monitoring tools ?
27)zombie process ? how to find & kill it ?
28) kernel level questions ?
29) Cassandra / Kafka/Hadoop/Spark experience ?
30)docker, docker swarm
31) git pipeline flow
32) maven creation of pom file
33) security phases sast & dast ?
34) docker images base image where its stored ?
35) creation of dockerfile and compose file ?
36) gateway, vpc peering?
37) ways to connect onpremise to aws infrastructure ?
38) rest api ? api development ? java ?
39) cloud networking ?
40) cloud infra setup ?
41) sqs ?
42) terraform ?
43) how to manage iam ?
44) full architecture of project and flow ?
45) how to manager docker containers ?
46) any expin development of full application flow using eclipse or some other tool ?
47) why its named route 53 ?
48) ansible basic concept ?
49) client server model explain
50) http vs https why ?
51) diff between tcp/ip & udp model ?
52) why not using ECS of aws ?
53) how to find full path process running from pid ?
54) how do u use certificates , what each file mean ?
55) string contained multipe character repeasting, convert it into unique characters only ?
56) kubernetes/docker swarm architecture ?
57) owasp 10 vulnerabilities ?
58) owasp stands for ?
59) cross forgery and cross site vulnerbailty ?
60) assignment : increase filesystem open files for system, application , service level
docker configuration for nginx ( fix issue )
write script to print all status code and hits in json and log file
61)architecture of your whole project
62) diff between jenkins and maven?
63) how to different between dev, sit, uat, prod in moven ?
64)any other tool used apart from jenkins for ci/cd ?
65)cloud front ?
66)sast / dast scan ?
67) types of LB and difference between them.
68) why didnt use awscodedeploy ?
69) api development ?
70) api flow from server to client ?
71) which is used for backend , front end , how application workflows ?
72) why not use onpremise for mysql/mongodb ?
73) jenkins pipeline which one you used ?
74) phases in pipeline existing project ?
75) allow disallow traffic apart from nacl, sg how ?
76) what is maven where it is used ?
77) two basic diff between nacl and sg grp ?
78)difference between aes encryption and hasing
79) man in middle attack
80) simple architecture of application draw
81) waf, what it does.
82) sast and dast scan
83) kms, alternative of kms if onpremise
84) cisf means ?
85) sts concept ?
86) how application works when identity needs to be picked from pool like cognito, when we implemented hasing algo
87) diff between security at transit & rest
88) why dast cannot cover sast ?
89) how to give knowledge to developers about security ?
90) how can developers be aware and convinced to secure code or follow best practices
91) diff between rsa and aes algo ?
92) what is the algo used in aes encryption ?
93) explain full devops process and cover everything in yout architecture, find out any componenet if missing ?
94) which monitoring you use and how ?
95) how backend data is access from front end using secuerity , during application flow?
96) use of cloudfront , waf, any other service to protect from ddos ?
97) how to secure man in middle attach ?
98) any developmental knowledge ?
99) Demerit of autoscaling?
100) questions on dns
101) route 53 { types of entries in it}
102) multicast and broad cast difference
103) tcp/udp difference with eg.
104) tcp transport layer explain.
105) dns is tcp/udp based ?
106) how tcp/ip model works for handshake process
107) check load of machine
108) application taking high load, what to do, root cause analysis?
109) top cmd, what all optiions it displays?
110) memory caching, paging ?
111) Ip address in which format, no. of bits ?
112) soft link & hard link difference ?
113) where do we use soft link and where do we use hard link ?
114) cmd to clear cache memory
115) find memory consumed by ram, disk, cache ? which cmds to see it ?
116) ping cmd workflow ?
117) how to decide and select family of ec2 instance ?
118) if we have 16 processor machine, how much load it can handle ?
119) garbage collection ?
120) when does garbage collection occur ?
121) db scaling how to implement ?
122) plan arch of prod server with subnets , explain ?
123) serverless db how in aws?
124) terraform default file ? state stored where ?
125) diff between ansible & terraform ?
126)write a dockerfile to pull ubuntu from dockerhub, apt upgrade, install nginx, create index.html, map ports, expose to world
127) how to deploy or run something in ansible when all ips are private ?
128) vpc peering how ?
129) dhcp, route 53 ?
130) redshift , how datastructure looks like ?
131) terraform & ansible difference, where terraform stores the state ?
132) terraform files where to store ?
133) dhcp in aws what it does ?
134) what tehcnologies to use for streaming data & performance improvement ? (aws)
135) cloudfront where do we use why ? explain usecases ?
136) types of cache and difference between them ?
137) ecs/eks
138) redshift ?
139) ci/cd pipeline workflow explain ?
140) sample terraform script write ?
141) python with ec2 connect sample code ?
142) modules used in python for your projects or past experience ?
143) aws elb & alb difference ? blue/green deployment ?
144) ansible used in which projects? write some sample playbook, draw architecture of ansible ?
145) elk ? what it does, componenets ? pluggings used in elk for your project ?
146) how to monitor logs of streaming data in TB's, if it gets deleted after few mins of creation ?
147) how to optimize cost in aws, where did u cut the costs ?
148) services used in aws name all ?
149) did u use infrastructure provisioning in aws production ? how ?
150) draw ci/cd workflow ?
151) whole arch of your project ?
152) what happends in case of merge, how will ci handle it ?
153) credential report ?
154) components of aws route 53 explain ?
155) implement cachec , types of cache in aws ?
156) cloudfront where, how used. concept of signed url in cloudfront ?
157) aws inspector ?
158) managed db aws explain why, how etc ?
159) bigdata flow aws arch ?
160) kafka ?
161) s3 encryption types ?
162) sqs, ses, sns ?
163) IAM ?
164) kms ?
165) security manager ?
166) rds, roles
167) configure ses how ?
168) normal architecture of fe && be draw with aws components
169) new service similar to elk, splunk in aws ?
170) cloudwatch ?
171) scenario where lambda is used ?
172) nat gateway ?
173) vpc peering ?
174) lifecycle of s3 ?
175) ebs/ephemeral volumes ?
176) cognito , active directory ?
177) waf, where to place it in aws components arch diagram ?
178) when to have private waf & when to have public waf ?
179) how to implement devsec ops in ci/cd pipeline ?
180) owasp 10 rules, what are they ?
181) tools used for sast & dast scan ?
182) encrypt data methods how ?
183) hashing & encrypting difference ?
184) sql injection what it does ?
185) cross side scripting means ?
186) ssl/tls difference ?
187) cloud security implementation & tools used ?
188) terraform state file name ?
189) default terraform file ?
190) redhat package for file , db ?
191) git pull/fetch difference ?
192) load, how to measure it ?
193) how much load is high ?
194) udp/tcp difference ?
195) w cmd displays 3-4 loads what are they ?
196) horizontal/vertical scaliing ?
197) how to scale without autoscaling ?
198) improve performance of application without autoscaling ?
199) ports for ntp, ssh, http, ssl, smtp ?
200) mutable, immutable infrastructure,
201) orchestarion/config mgt tool tools and why ?
202) s3, git
203) difference between vpc gateway & endpoint
204) pre signed url concept explain ?
205) cloud front origin identity user means
206) setup jenkins server ci/cd whole workflow steps ?
207) aws code deploy how it works , gitlad ci/cd workflow ?
208) #### learn architect aws ##### ques to draw the architecture here based on scenario
https://cloudcraft.co/
209) identify a computer within same network ?
210) how to find count of , in a file ?
211) boot process of linux ?
212) what happens when i hit ww.google.com
213) pwershell exp ?