Please enable JavaScript.

Coggle requires JavaScript to display documents.

Licenta Scris - Coggle Diagram

- - - - variable polymorphism shaves off extra info and saves just base class.
      - Pointers save the whole class
        
        the functions called, iff abstract in base(superclass), will be from the subclass
- - - - ln
  - - - done
    - - stops current proc and replace with himself
    - - arr[2]; pipe(arr);
        
        close(arr[0]);
        
        read - arr[0]
        
        read(arr[0], address, memsize)
        
        write - arr[0]
    - - mkfifo(stringName)
    - - while ( wait (null) > 0)
        
        wait for all children to finish
    - - difference between ' ' and " "
        
        https://askubuntu.com/questions/1146789/single-quote-and-double-quotes-in-sed
  - - - http://www.cs.ubbcluj.ro/~rares/course/os/res/teaching/teaching-notes.pdf
    - - cat
      - chmod
      - cp
      - cut
    - - I/O redirections
        
        > : override
        
        >> : add to file
        
        < : input
        
        << : read until delimiter is read
      - predefined variables ($0, $1,..., $9, $*,
        $, $?)
        
        $*
        
        https://stackoverflow.com/questions/12314451/accessing-bash-command-line-args-vs
        
        $@
        
        $#
        
        nr arguments
- - - - just one attribute in a cell
    - - • the functional dependency {Course} → {FacultyMember} holds => attribute
      - FacultyMember is not fully functionally dependent on a key, hence the EXAM
      - relation is not in 2NF
    - - a relation that is in 2NF and not in 3NF has a dependency 𝛼 → 𝛽, where 𝛼 is
        a non-prime attribute