Computer Technology

DBMS Integrity Constraints – Full Details with Examples

What are Integrity Constraints? Integrity constraints are rules enforced on database columns to ensure that the data remains accurate, valid, and consistent.They protect the database from corrupt or invalid data…

LAV PRATAP 29/04/2025

DBMS

Difference Between Primary Key and Foreign Key

AspectPrimary KeyForeign KeyDefinitionUniquely identifies each record in a table.Creates a relationship between two tables.UniquenessMust be unique for each record.Can have duplicate values.NULL ValuesNULLs are NOT allowed.NULLs are allowed (if no…

LAV PRATAP 29/04/2025

DBMS

Foreign Key in DBMS – Full Explanation with Example

A Foreign Key is a very important concept in relational databases. It is used to create a relationship between two tables. What is a Foreign Key? A Foreign Key is…

LAV PRATAP 29/04/2025

DBMS

Primary Key in DBMS – Full Explanation with Example

A Primary Key is a fundamental concept in relational database management systems (RDBMS). It is used to uniquely identify each record (or row) in a database table. What is a…

LAV PRATAP 29/04/2025

COMPUTER

Difference between Combinational Circuits and Sequential Circuits

Introduction In digital electronics, circuits are broadly classified into Combinational and Sequential circuits based on whether they have memory or not.Both types are essential but serve different purposes depending on…

LAV PRATAP 26/04/2025

COMPUTER

Full Details of Sequential Circuits

Table of Contents What is a Sequential Circuit? Key Characteristics Difference between Combinational and Sequential Circuits Components of Sequential Circuits Types of Sequential Circuits Examples of Sequential Circuits State Diagrams…

LAV PRATAP 26/04/2025

COMPUTER

Full Details of Combinational Circuits

Table of Contents What is a Combinational Circuit? Key Characteristics of Combinational Circuits Difference Between Combinational and Sequential Circuits Basic Building Blocks Types of Combinational Circuits Common Examples Design Procedure…

LAV PRATAP 26/04/2025

COMPUTER

Difference Between Primary Memory and Secondary Memory

Point of ComparisonPrimary MemorySecondary Memory1. Also Known AsMain Memory or Internal MemoryExternal Memory or Storage Memory2. VolatilityVolatile (except ROM) — data lost when power is offNon-volatile — data remains even…

LAV PRATAP 25/04/2025

COMPUTER

Secondary Memory (Secondary Storage) – Full Explanation

1. Introduction to Secondary Memory Secondary Memory, also known as External Memory or Storage Memory, is the type of computer memory that stores data permanently. Unlike primary memory (RAM), secondary…

LAV PRATAP 25/04/2025

COMPUTER

Primary Memory (Main Memory) – Full Explanation with example

1. Introduction to Primary Memory Primary Memory, also known as Main Memory or Main Storage, is the memory directly accessible by the Central Processing Unit (CPU) of a computer. It…

LAV PRATAP 25/04/2025