If two trees have same structure and node content, then they are called ____

Synonyms trees

Joint trees

Equivalent trees

Similar trees

A data item that can be used to distinguish between two entities (records) is known as

Alternate key

Primary key

Primary data item

Unique data item

A data structure whose elements form a sequence is known as

 Heterogeneous data structure

Homogeneous data structure

Linear data structures

Non- linear data structure

Which of the following statements about a binary tree is not correct?

Every binary tree has at least one node

Every non-empty tree has exactly one root node

Every node has at most two children

Every non-root node has exactly one parent

Which of the following operating systems is produced by IBM ?

OS-2

Windows

DOS

UNIX

Features of HTML5 ?

It has introduced new multimedia features which supports audio and video controls by using audio and video tags. There are new graphics elements including vector graphics and tags. Enrich semantic content by including header footer,article,<section> and <figure> are added. Drag and Drop. The user can grab an object and drag it further dropping it on a new location. Geo-location service- it helps to locate the geographical location of a client. Web storage facility which provides web application methods to store data on web browser.

a. Uses SQL database to store data offline.

b. Allows to draw various shapes like triangle, rectangle, circle, etc.

c. Capable of handling incorrect syntax.

d. Easy DOCTYPE declaration 

e. Easy character encoding