Data_Storage_Units_and_System_Components.pptx

Basic units of data storage
Bit
Byte
Kilo byte KB
Mega byte MB
Giga byte GB
Tera byte TB
Word
System and its components and procedures
Hardware
Software
User
Data/information
Communication

1. basic units of data storage The basic units of data storage are as follows: 1. Bit Computer works with binary digits. These digits are in the form of 0’s and 1’s. A binary digit is called bit. One bit takes one storage location in memory. It is the smallest unit for data storage. 2. Byte A collection of eight bits is called byte. It is used to store single character. The capacity of memory or the storage is expressed in terms of bytes.

2. basic units of data storage 3. Kilobyte A kilobyte consists of 1024 bytes. It is denoted by KB. 4. Megabyte A megabyte consists of 1024 kilobytes. It is denoted by MB. 5. Gigabyte A gigabyte consists of 1024 megabytes. It is denoted by GB. 6. Terabyte A terabyte consists of 1024 gigabytes. It is denoted by TB.

3. basic units of data storage The following table indicates storage capacity terms are as follows: Unit Abbreviation No. of bytes (approx.) No. of bytes Kilobyte K or KB (2^10) 1024 Megabyte M or MB (2^20) About one million Gigabyte G or GB (2^30) About one billion Terabyte T or TB (2^40) About one trillion

4. basic units of data storage 7. Word A computer word is the number of bytes in common unit of data defined by the computer system. It is normally the size of a register. The length of a word is different in different computers. The larger word indicates more powerful computers.

5. basic units of data storage The following tables indicates different word sizes: No. of bytes No. of bits Era of computer One byte 8 Very early personal computer Two byte 16 Traditional micro-computer Single Word 32 Mainframe, mini-computers and microcomputers Double Word 64 Super computers and some micro computers

6. Convert 240MB of memory in bytes and kilobytes. Solution Number of bytes in one MB = (2^20) Total Number of bytes in 240MB = 240 * 2^20 bytes Number of kilo-bytes in one MB = 2^10 KB Total Number of Kilo-bytes in 240 MB = 240 * 1024 KB = 1024 KB

7. Convert 60 GB of memory into words? Solution Number of bytes in 60GB = 60 * 2^30 Number of words in 4 bytes = 1 W Number of Words in 60 GB = 60 / 4 * 2^30 = 15 * 2^30 Words

8. Define system and its components. System A system is a combination of different components that work with each other to perform specific tasks. Different procedures are used to perform different tasks in the system. procedure A procedure is a set of steps performed in a regular and specified order to accomplish a task. For example , the registration of students is a procedure in an education system.

9. Components of System