Misc.

Question 1

Heuristics

Answer 1

• A type of shortcut or rule of thumb used by an algorithm
• Or an estimate that can be included in an algorithm to make it run faster
• Examples:
  
  • distance heuristic in A*

Question 2

LRU Cache

Answer 2

• Least-Recently Used cache
• Places items used more recently towards the front and least recently towards the back

Question 3

Side Effects

Answer 3

• A situation in which a function modifies a variable defined outside of its scope

Question 4

$PATH variable

Answer 4

• Makes functions available anywhere in terminal

Question 5

error first callback

Answer 5

• a convention in which
  
  • the first argument of a callback is reserved for an error object
  • the second argument of a callback is reserved for any successful response data
• a popular pattern in node.js

Question 6

semantic versioning

Answer 6

• formal convention for specifying the version of a specific piece of software
• number consits of three parts: major.minor.patch
• ex, 1.7.2:
  
  • increase patch number when bugs are fixed
  • increase minor number when new features were added
  • increase major number when big (breaking) changes are made; code written in previous major might not work

Question 7

abstract class

Answer 7

*