Lecture 2

Question 1

What are the six capabilities of DevOps? SMURFS

Answer 1

Security, Maintainability, Usability, Reliability, Flexibility, Scalability

Question 2

What is VCS?

Answer 2

Centralised Version Control System: using a central server to store all files, changes are made directly the the repository, all versions are saved

Question 3

What is distributed VCS?

Answer 3

Moving from a client-server model to a peer-to-peer approach, every programmer has a local copy and can update these with changes from the central repository

Question 4

What is an example of a distributed VCS tool?

Answer 4

Git

Question 5

What is a branching strategy?

Answer 5

The strategy software developers use when writing and merging code when using a VCS

Question 6

What are the advantages of branching strategies?

Answer 6

-Enhance productivity and enable parallel development
-Map a clear path through production and organise new releases
-Maintain bug-free code by fixing issues faster

Question 7

What are the commonly used branches of the GitFlow branching strategy?

Answer 7

-A Master/Main branch
-A Development branch
-A Features branch
-A Hotfix branch, for new bugs and errors

Question 8

What is TBD?

Answer 8

Trunk-Based Development is, unlike GitFlow, when no branches are used; instead all programmers merge their changes onto the “trunk” once a day. This trunk should be ready to go into development at any time.

Question 9

TBD is a key enabler of what?

Answer 9

CI/CD, since changes are made to the trunk more frequently this allows features to be released faster

Question 10

What branching strategy is often combined with feature flags?

Answer 10

TBD, this allows changes not ready for release to be hidden even though they are part of the trunk

Question 11

What is the opposite of a monolithic architecture?

Answer 11

Micro services

Question 12

What are examples of infrastructure components?

Answer 12

Computing resource, database, network, caching

Question 13

What does it mean for delivery pipelines that deploy applications/infrastructure to be treated as code?

Answer 13

They should be placed under source control and modularised in reusable components with automated testing and deployment

Question 14

What are the problems of using a GUI for deployment?

Answer 14

Developers can’t collaborate, difficult to troubleshoot, difficult to rollback changes

Question 15

What are the four benefits of using pipelines as code?

Answer 15

-Version control
-Audit trails
-Collaboration
-Knowledge sharing