Summary Devops A Business Perspective

ISBN-10 9401803722 ISBN-13 9789401803724
176 Flashcards & Notes
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A snapshot of the summary - DEVOPS A BUSINESS PERSPECTIVE Author: OLEG SKRYNNIK ISBN: 9789401803724

  • 1 What is DevOps?

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  • 1.1 Origins

  • Name two reasons for DevOps to appear.
    • Adoption of agile software development
    • Management of IT infrastructure as a program code.
  • 1.1.1 Agile methods for software development

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  • Describe the historical developments for software development.
     Waterfall to Scrum to Agile
  • Describe the waterfall method
    A software development method of sequential execution of predetermined stages, each of which takes significant time and ends with the achievement of previously agreed results.
  • What is the disadvantage of the waterfall method?
    It takes a long time to make the product
    Changes in the product due to added customer requirements, market opportunities are difficult.
  • Kent Beck wrote a book about
    XP Extreme Programming.
  • Scrum and XP where not the solution for improving the development cycle. Why?
    Scrum and XP focused on the programming not on the whole development cycle.
  • What are the key elements of agile development?
    • Closer interaction between the customer and developer
    • reduction of batch size
    • product delivered at short intervals
    • limited size of the teams
  • Why is the effect of the Agile approach not a great as expected?
    • Business needs not clear or well elaborated, prioritization
    • The fragile state of the IT infrastructure
    • Lack of obsolescence of the IT systems documentation
  • 1.1.2 Managing infrastructure as code

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  • Which two technologies made management of IT infrastructure as code possible?
    Virtualization and cloud computing.
  • What is a chroot?
    A chroot is a part of a Unix operating systems that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name (and therefore normally cannot access) files outside the designated directory tree. The term "chroot" may refer to the chroot(2)system call or the chroot(8) wrapper program.

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