Summary: Devops A Business Perspective | 9789401803724 | OLEG SKRYNNIK

Read the summary and the most important questions on DEVOPS A BUSINESS PERSPECTIVE | 9789401803724 | OLEG. SKRYNNIK

• 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.