Category Archives: Course on Computer Concetps

Learn Online Octal Number System CCC Course

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. Octal numerals can be made from binary numerals by grouping consecutive binary digits into groups of three (starting from the right). For example, the binary representation for decimal 74 is 1001010. Two zeroes can be added at the left: (00)1 001 010, corresponding the octal digits 1 1 2, yielding the octal representation 112.

Some importance of octal number system

The binary number system is an alternative to the decimal (10-base) number system that we use every day. Binary numbers are important because using them instead of the decimal system simplifies the design of computers and related technologies.

Learn Hexadecimal Number System Online CCC Course

Hexadecimal number system • The number system with base or radix digit is (16) is known as hexadecimal number system. • This system requires 16 digits to represent the number. • The first 10 digits are digits of the decimal system from 0 to 9 and remaining 6 digits are denoted by (A to F) which representing decimal values (10 to 15) where A=10, B=11, C=12, D=13, E=14, F=15.

Conversions from one system and another system

Conversion of decimal to binary • The easiest way to convert decimal to its binary equivalent is to use division algorithm. • Divide by two, keep track of the remainder at each step. • Put a remainder bit as 0, if that number gets divided by two. • Put a remainder bit as 1, if that number not divided by two. FIG 1.78: Example for Decimal to Binary Conversion • The binary equivalent of 67(10) is 1000011(2). Conversion of binary to decimal • Multiply each bit by 2n , where n is “weight” of bits. • The weight is position of the bit, which starts from 0 on the right, then 1 and goes on. • Add the result. E-Content of COURSE ON COMPUTER CONCEPTS (CCC) Page | 93 F 2 FIG 1.79: Example for Binary to Decimal Conversion • Decimal equivalent of 11010(2) is 26(10). Conversion of binary to hexadecimal • Group bits in fours, starting from the right. • Convert to hexadecimal digits • To convert 1011010111(2) to hexadecimal, just substitute the codes. FIG 1.80: Example of Binary to Hexadecimal Conversion • The hexadecimal equivalent of 1011010111(2) is 2C7(16) E-Content of COURSE ON COMPUTER CONCEPTS (CCC) Page | 94 F 2 Conversion of hexadecimal to binary • Convert each hexadecimal digit to a four bit equivalent binary representation. • To convert 10AF (16) to binary, just substitute the codes. FIG 1.81: Example for Hexadecimal to Binary Conversion • The Binary equivalent of 10AF (16) is 0001000010101111(2)

Data Processing – CCC – Course on Computer Concepts

1.6.1 Data Processing – CCC – Course on Computer Concepts

Concept of Data Processing

Data processing is the process in which the information is gathered/collected and stored in the form of electronic media and manipulated into a more useful form.

Data Processing Cycle

The Data Processing Cycle consists of the following steps:

. Input

. Processing

. Output

. Storage

Storage: Store and Retrieve

Input: Sorting, calculating, summarizing, comparing

Data: Collection, Conversion

Output: Communicate and Reproduce

In this step the input data are coded or converted into machine readable form, so that it can be proceed through a computer.

Functions of Data Processing

The Four major functions of Data Processing of a computer are:

  1. Validating
  2. Sorting
  3. Analyzing
  4. Reporting

Validation: Validating of data helps user to identify invalid cases, variables and data value in the particular data. After Validation data will be clean, correct and useful.

Sorting: Arranging data in specific order is called sorting. Sorting- Alphabetical order. For example- Names in telephone book are sorted in alphabetical order.

Analyzing: It is the process in which data is organized, reviewed, verified and interpreted.

Reporting: In this function a collection of data is condensed and certain conclutsions from the data are represented in a simple form.