Answer
Repeating the operation has the same effect as performing it once.
SpecificationsnormativeSheet 10 of 18
A compact Markdown study guide that opens as a focused, keyboard-friendly deck with rich answers.
*.flashcards.md§ 01
Every level-2 heading is the front of a card. The blocks below it are the back: prose, lists, code, tables, and quotations stay useful in plain Markdown and become a composed answer in HTML.
--- markdownto: [email protected] title: Systems fundamentals --- # Systems fundamentals ## What does idempotent mean? Repeating the operation has the same effect as performing it once. ## Why use a write-ahead log? It makes intended changes durable before the main data pages are updated. ## What are the three useful cache outcomes? - hit - miss - stale value served while revalidating
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Click the card or press Space to flip · Arrow keys move through the deck
§ 02
## Question?§ 03
Verb
Meaning
Source edit
review
Lists prompts, or reveals one one-based card with --card.
None. Review state stays outside the canonical file.
§ 04
--- markdownto: [email protected] --- ## An answer without a prompt. ## Repeated? First answer. ### Too deep ## repeated? Second answer. ## No answer
MDTO1001 error line 5
##
Flashcard question is empty.
MDTO1003 error line 13
### Too deep
Heading level 3 is not valid in [email protected]: use one leading # title and ## questions.
MDTO1002 error line 15
## repeated?
Duplicate flashcard question repeated?: already declared on line 9.
MDTO1005 error line 19
## No answer
Flashcard No answer has no answer content.
Read flashcards.md or run mdto spec flashcards for the complete contract.