rookie questions

• null pointer in C++
• how can I create executable file for the program written on Java?
• Change background color of python shell
• Floyd's cycle-finding algorithm
• catching exceptions in ML
• Which of these options is good practice for assigning a string value to a variable in C?
• Simultaneous assignment in Go
• copy constructor of base and derived classes
• mechanism to get element from the list
• overloading in different programming languages [closed]

rookie answers