8th Class Computers Science IT Basics Introduction to ASCII          

   Introduction to ASCII

ASCII (American Standard Code for Information Interchange) is a seven bit code which includes 128 characters. Basically it is a method of character encoding. In 128 characters, 33 are printable characters and 94 are non printable characters.  

  ASCII (American Standard Code for Information Interchange) is a seven bit code. An ASCII code includes.....printable character.

(A) 94                                                                   

(B) 33

(C) 128                                                                 

(D) 31

(E) None of these  

Answer: (b)

Explanation

Correct Option:

(C) An ASCII is a seven bit code which includes 33 printable characters and 94 non printable characters.

Incorrect Option:

Rests of the options are invalid.  

  The hexadecimal number system is based on 16. In hexadecimal number system 15 is represented by?

(A) A                                                                     

(B) B

(C) E                                                                      

(D) F

(E) None of these  

Answer: (d)

Explanation

Correct Option:

(D) In hexadecimal number system 15 is represented by F.

Incorrect Option:

(A) In hexadecimal number system 10 is represented by A.

(B) In hexadecimal number system 11 is represented by B.

(C) In hexadecimal number system 14 is represented by E.  

  A number system with a base-2 is known as binary number system. The whole binary number system depends on two digits. These are..................

(A) 1 and 2                                                         

(B) 0 and 1

(C) 2 and 10                                                       

(D) 1 and 16

(E) None of these  

Answer: (b)

Explanation

Correct Option:

(B) The whole binary number system depends on two digits these are 0 and 1, respectively.

Incorrect Option:

Rests of the options are invalid