Posts tagged Self Study

Sandbox

“Like all security features, the Application Sandbox is not unbreakable. However, to break out of the Application Sandbox in a properly ...

Dalvik Virtual Machine

  How each process gets an instance of the Dalvik VM When the system boots up, the boot loader loads the kernel into memory and initializes ...

Java Native Interface

Overview JNI allows you to use native code when an application cannot be written entirely in the Java language. The following are typical ...

tee command

less command on the picture is used to display information to the terminal one page at a time. less is faster than other command because it ...

File permission

If you type ls -l, you can see file permission like below. First letter indicates if it is a Directory. Next each group of three characters ...

Dead code

Dead code can never be executed (unreachable code), and it only affects dead variables (written, but never read again), that is, irrelevant to ...

Method Inlining

Inlining is an optimization performed by the Java Just-In-Time compiler. The compiler may decide to replace your function call with the body of ...

Pipe & Redirection

Pipe is used to pass output to another Program or Utility. thing1 | thing2 thing1’s output s will be passed to things2 Program or Utility. ...

Garbage Collection

Garbage Collector root Local variables in the main method The main thread Static variables of the main class Mark and Sweep Algorithm The ...