std7

How many characters are defined in ASCII code?

• (a) 512

• (b) 65

• (c) 128

• (d) 256

. Which number system has the base 16?

• (a) Decimal Number System

• (b) Binary Number System

• (c) Octal Number System

• (d) Hexadecimal Number System

To convert a decimal number into its binary equivalent, you have to divide it by

• (a) 10

• (b) 8

• (c) 16

• (d) 2

. A database management system enables its users to

• (a) Access database

• (b) Manipulate data

• (c) Manage data

• (d) All of these

. The data in relational database management system is stored in the form of

• (a) Files

• (b) Tables

• (c) Boxes

• (d) None of these

In SQL, the sentences that are used to complete a task are called

• (a) Tables

• (b) Forms

• (c) Queries

• (d) Attributes

7. It is a column or set of columns in a table that uniquely identifies rows in a table.

• (a) Primary Key

• (b) Composite

• (c) Foreign Key

• (d) None of these

The SQL_____________ statement is used to delete the contents of a table but not the table itself.

• (a)alter

• (b) Drop

• (c)Delete

• (d) Select

(A37E)₁₆ is an example of

• (a) Binary Number System

• (b) Hexadecimal Number System

• (c) Octal Number System

• (d) Decimal Number System

9. Which of the following tags is used to create a new row in a HTML table?

• (a)<r>

• (b)<tr>

• (c)<tablerow>

• (d)<row>