Question Discussion & Solution

The correct answer is Atomic Energy.

Key Points

• A biomass energy source is one that is derived from organic matter.
• The source of atomic energy is radioactive metals which are of non-organic nature and thus cannot be classified as a biomass energy source.

The correct answer is New Incognito Window.

Key Points

• Incognito Window
  • ​Private browsing is a privacy feature in some web browsers.
  • When operating in such a mode, the browser creates a temporary session that is isolated from the browser's main session and user data.
  • Browse in private
    • Switch on computer > open the Chrome app.
    • To the right of the address bar, tap More> New Incognito tab.
    • A new window appears.
    • In the top left, check for the Incognito icon.

Additional Information

• New tab and New window
  • The big difference is that browser tabs are easier for users to manage than browser windows.
  • When a new window opens, it covers the user's earlier window.
  • But when a new tab opens, the user can still see their earlier tab at the top.
• New Window
  • ​Open File Explorer (Win+X)> Right-click or press and hold on one or more selected folder libraries, or drives in File Explorer> click/tap on Open in a new window.
• New Tab ​
  • New Tab is a button on the tab bar which easily creates a new file. 
• ​Bookmark
  • ​A bookmark is a saved shortcut that directs your browser to a specific webpage.
  • It stores the title, URL, and favicon of the corresponding page.

Encapsulation

• It is the process or method to contain the information.
• Wrapping of data and function into a single unit is called data encapsulation
• Encapsulation is a method to hide the data in a single entity or unit along with a method to protect information from outside.
• It can be implemented using by access modifier.  

Important Point:

• Data Abstraction is the method of hiding unwanted information.
• Polymorphism is a feature of OOPs that allows the object to behave differently in different conditions. 
• The objects that help to perform abstraction are encapsulated but the objects that result in encapsulation need not be abstracted.

The correct answer is a Business database.

Key Points

Business Database:

• A business database contains business customers’ past purchases; past volumes, prices, and profits.
•  It also contains buyer team remembers names (and ages, birthdays, hobbies, and favorite foods); status of current contacts; an estimate of supplier’s share of the customer’s business; competitive suppliers; assessment of competitive strengths and weakness in selling and servicing the account; and relevant customer buying practices, patterns, and policies.
• It is considered as a cloud where all the information is stored and kept for use.

Void pointer: It is a specific pointer type – void * – a pointer that points to some data location in storage, which doesn’t have any specific type. Void refers to the type.

• void pointers cannot be dereferenced. It can however be done using typecasting the void pointer
• Pointer arithmetic is not possible on pointers of void due to lack of concrete value and thus size

Other Important Points

Dangling pointer: A pointer pointing to a memory location that has been deleted (or freed) is called dangling pointer.   

Uninitialized pointer : An uninitialized pointer stores an undefined value. A null pointer stores a defined value, but one that is defined by the environment to not be a valid address for any member or object.

NULL Pointer : NULL Pointer is a pointer which is pointing to nothing. In case, if we don’t have address to be assigned to a pointer