<span>C. real-time operating system</span>
<span>Words or names defined by the programmers are called as programmer defined symbols or identifiers. These are called as variables which are just simple storage locations and making available for the program to use. No two variables are same in the code of the program.</span>
Answer:
A key benefit of inheritance is: an object can have several types, it is type compatible with any of its super classes
Explanation:
- Inheritance is one of the fundamental concepts of Object Oriented Programming.
- Inheritance allows classes (derived classes) to inherit the methods and properties of a class (base class).
- The class or classes that inherits the characteristics from another class is called a derived class, child class or sub class. Derived class can also has it own methods and attributes additionally.
- The class whose methods and properties are inherited by the derived class or classes is called a base class, super class or a parent class.
- Benefit of inheritance is that inheritance new objects can take properties of existing objects and an object can have many types.
- Also a child class can inherit from more than one super classes which is called multiple inheritance.
- Multiple inheritance allows a class to implement more than one abstract classes.
- An object can have several types. These types can be of an object's own class and also other types which include all classes that a class inherits.
- If a variable is declared to be the type of super class then value of that variable can refer to any instance that instantiated from any class that inherits that super class. This means that an object is type compatible with an of its super classes.
Answer:
Linux directories and their purposes are:
1) lib - Lib file contained the share object library file which necessary to boots system and this directory contain file module stored in the kernel.
2) etc - etc file is the configuration file that they are local in the machines. When the program run these file are stored in the directories. this can be static and do not executable directory.
3) Boot - Boot file are stored in the directory which required processing of linux boot and such files are included in the linux kernel of the file.
4) Root - Root file are the best user root directory and user cannot view this directories from there account. This file usually contain administrative file system.
5) Home - Home file contained the user directory and it is the default system of linux. Home directory helps user to enable any network system to access there home directories.
