D522 Python for IT Automation - Set 4 - Part 3

Correct Answer: Reading it line by line

Iterating over a file line by line processes it incrementally, avoiding the memory cost of loading the entire file at once.

Correct Answer: Reusable, testable units that reduce duplication

Functions encapsulate reusable logic, making automation tasks easier to test, reuse, and maintain while reducing duplication.

Correct Answer: Managing infrastructure through machine-readable definition files

Infrastructure as code manages and provisions systems through version-controlled definition files rather than manual configuration.

Correct Answer: Re-running produces the same desired state safely

Idempotent automation can be run repeatedly to converge on the same desired state without causing errors or drift.

Correct Answer: Handling transient failures by attempting again

Retry logic re-attempts operations that fail temporarily, such as brief network glitches, improving reliability of automation.

Correct Answer: Increasing the wait time between retries

Exponential backoff progressively increases the delay between retries, avoiding overwhelming a struggling service while allowing recovery.

Correct Answer: So operators know results without inspecting internals

Clear output or notifications inform operators of success, failure, and actions taken, which is essential for unattended automation.

Correct Answer: Consistency, speed, and reduced human error at scale

Automating routine tasks with Python delivers consistent, fast, repeatable results at scale while reducing manual effort and human error.

Correct Answer: Tasks run reliably at the right time without human intervention

Scheduling ensures routine tasks execute consistently at defined times without depending on someone to remember and run them.

Correct Answer: Log the error and exit with a non-zero code

When a script cannot safely proceed, it should log the problem and exit with a non-zero code so schedulers and operators are alerted to the failure.