Compute Code

Q.       What do you understand by data?              

Ans.: Data: Data are the names given to basic facts such as names and numbers. Examples of data are unit price, quantity sold, times, dates, product, names, addresses, tax codes etc. The raw material of information is called data.

Q.       What do you understand by information?

Ans.: Information: Information is processed data which is information is data which have been converted into a more useful form. For example: total price = unit price X quality sold. Here total price is information and unit prices, quantity sold are data.

Q.       What do you understand by code?

Ans.:  Code: The instructions or statements that are the basis of a computer program. Data and information that is processed by instructions called Code. Processing language is called code. After completing project raw materials of the project is called data.

Q.       What is BCD?        

Ans.: BCD: Binary–Coded Decimal. In computing and electronic systems, binary-coded decimal (BCD) is a digital encoding method for numbers using decimal notation, with each decimal digit represented by its own binary sequence.

Q.       What is ASCII?

Ans.: ASCII: American Standard Code for Information Interchange. ASCII is a character-encoding scheme originally based on the English alphabet. ASCII codes represent text in computers, communications equipment, and other devices that use text. Most modern character-encoding schemes are based on ASCII, though they support many additional characters.

Q.       What is Unicode?

Ans.:  Unicode: Unicode is a sixteen-bit code. It is design to support international languages (like Bangla, Hindi, Chinese, Japanese, and Arabic etc.). It provides a unique number for every character, no matter what the platform, no matter what the program, no matter what the language. Unicode, a 16-bit code system, is developed by Unicode Inc.

Q.       What is Binary code?

Ans.: Binary code: A numbering system which base has two. It has only two bits 0 and 1.

Q.       What is text code?

Ans.: Text code: A standard system in which numbers represent the letters of the alphabet, punctuation marks, and other symbols. A text code enables programmers to use combinations of numbers to represent individual pieces of data. The four most popular text code systems invented are the following: EBCDIC, ASCII, Extended ASCII and Unicode.

Q.       Why it is important to have a standard text code?

Ans.: The International Standard Text Code (ISTC) is a numbering system developed to enable the unique identification of textual works. An ISTC can be applied to any textual work by any authorized representative of the author of a textual work. The ISTC standard is published by the International Standards Organization as ISO 21047. Standard text code is important because it would enable any programmer or program to use the same combination of numbers to represent the same individual pieces of data.

Q.       What is parity check method?

Ans.: Parity check method:

In communications, parity checking refers to the use of parity bits to check that data has been transmitted accurately. The parity bit is added to every data unit (typically seven or eight bits ) that are transmitted. The parity bit for each unit is set so that all bytes have either an odd number or an even number of set bits.

Q.       Define Odd & Even parity.

Ans.:  Odd parity:

            The number of 1-bit must add up to an odd number

            Example: odd parity

            1000000(0)

            1111101(1)

            1001001(0)

            Even parity:

            The number of 1-bit must add up to an even number

            Example: even parity

            1000000(1)

            1111101(0)

            1001001(1)