Question Discussion & Solution

• The Best example of Run time polymorphism is Function Overriding
• Function Overloading is the example of Compile time polymorphism
• Protected is an Access modifier  

Important Point

Compile-time polymorphism

It means binding is occurring at compile time It can be achieved through static binding. If a class has multiple methods having the same name but different in parameters, it is known as Method Overloading.

Run time polymorphism

At run time we came to know which method is going to invoke It can be achieved through dynamic binding. If subclass (child class) has the same method as declared in the parent class, it is known as method overriding

Access Modifiers

It specifies the accessibility or scope of a field, method, constructor, or class. There are three types of Access modifiers

• Public: The methods or data members that are declared as public can be accessed anywhere in the program.
• Private:  The methods or data members declared as private are accessible only within the class in which they are declared.
• Protected: The methods or data members declared as protected can accessible within the same class or class which is inherited from it.

All except Flower are type of Plants

• A CASE tool is a generic term used to denote any form of automated support for software engineering, in a more restrictive sense a CASE tool can mean any tool used to automate some activity associated with software development
• Some of the CASE tools assist in phase-related tasks such as specification, structured analysis, design, coding, testing, etc. and others to non-phase activities such as project management and configuration management
• The primary objectives of using any CASE tool are:

1. To increase productivity.
2. To help produce better quality software at a lower cost.

The correct answer is Application software.

Key Points

• Spreadsheets, photo editing, PowerPoint, word documents, etc, are examples of Application software.
  • Application software, or app for short, is software that performs specific tasks for an end-user.
  • Effectively, if the user is interacting directly with a piece of software it is application software.
    • For example, Microsoft Word or Excel is application software, as are common web browsers such as Firefox or Google Chrome.
  • It also includes the category of mobile apps, including communication apps such as WhatsApp or games such as Candy Crush Saga.

Additional Information

• System Software
  • System software is a type of computer program that is designed to run a computer's hardware and application programs.
  • If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications.
  • The operating system is the best-known example of system software.
  • The OS manages all the other programs on a computer.
  • System software is used to manage the computer itself.
    • It runs in the background, maintaining the computer's basic functions so users can run higher-level application software to perform certain tasks.
    • Essentially, system software provides a platform for application software to be run on top of.
• System software generally includes the following features:
  • High speed
    • System software must be as efficient as possible to provide an effective platform for higher-level software in the computer system.
  • Hard to manipulate
    • It often requires the use of a programming language, which is more difficult to use than a more intuitive user interface (UI).
  • Written in a low-level computer language
    • System software must be written in a computer language the central processing unit (CPU) and other computer hardware can read.
  • Close to the system
    • It connects directly to the hardware that enables the computer to run.
  • Versatile
    • System software must communicate with both the specialized hardware it runs on and the higher-level application software that is usually hardware-agnostic and often has no direct connection to the hardware it runs on. 
• The platform is hardware and software architecture that acts as a foundation or base upon which other applications, processes, or technologies are developed.
  • In computing, platform refers to basic hardware i.e., computer system, and software i.e., the operating system on which software applications are often run. 

The correct option is 2 i.e. Sodium Carbonate

Key Points

• Sodium Carbonate is also known as washing soda it is a salt of carbonic acid.
• Sodium carbonate can be manufactured by Solvay's process.
• It is used for treating hard water and industrial detergent mixtures.
• The aqueous solution of sodium carbonate is alkaline.
• Calcium Sulphate exists in the forms of white solids and is not soluble in water.
• Plaster of Paris and Gypsum are its hydrates.