News

Comments

Post a Comment

Popular Posts

Database Management System (DBMS)

Image
  Introduction A database is the collection of related persistent data and contains information relevant to an enterprise. The database is also called the repository or container for a collection of data files.  For example, university database for maintaining information about students, courses and grades in university. A database system is basically just a computerized record-keeping system. A database system involves four major components: data, hardware, software, and users. The database management system (DBMS) is the software that handles all access to the database. It is defined as the collection of interrelated data and a set of programs to access those data. Users of a DBMS system can perform the following basic operations on the database: Adding new, empty files to the database.  Inserting data into existing files. Retrieving data from existing files.  Changing data in existing files.  Deleting data from existing files.  Removing existing file...
Read more

Error Detection And Correction Codes (Digital Logic)

Image
Basic approach used for error detection is the use of redundancy, where additional bits are added to facilitate detection and correction of errors.  Popular technique are:  Simply Parity Check Two-dimension parity check Checksum Cyclic redundancy check Parity method for Error Detection Table: Message with even parity and odd parity Even Parity  Definition: In even parity the number of bits set to 1 in a data item, including the parity bit itself is always even. If the number of 1s in the data is odd, the parity bit is set to 1 to make the total number of 1s even. Odd Parity Definition: In odd parity the number of bits set to 1 in the data item including the parity bit is always odd. If the number of 1s in the data is even the parity bit is set to 1 to make the total number of 1s odd. Notes: - Parity method is only for the error detection not for the error correction. -  This method provide for the detection of single bit error (or any odd number of errors, which is...
Read more

Operating System Notes for BCA 4th Semester

Image
Operating System        What is Operating System ? Overview An operating system (OS) is a software program that acts as an intermediary between computer hardware and the applications that run on a computer. It manages and coordinates various hardware and software components to provide a user-friendly and efficient environment for computing.  Key functions of an operating system includes: Process Management: The OS handles the execution of processes (programs) by allocating CPU time, managing process synchronization, and controlling process communication. Memory Management: It manages the computer's memory, allocating and deallocating memory space for different programs and ensuring efficient utilization of available memory resources. File System Management: The OS manages files and directories on storage devices, facilitating reading, writing, and organization of data on storage media such as hard drives, solid-state drives, and removable devices. Device Mana...
Read more

Contact Us

Name

Email *

Message *

Followers