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Category Archives: Computer Subject

What is Functional Dependency? A functional dependency X->Y in a relation holds if two tuples having same value for X also have same value for… Read More
Both CPU Cache and TLB are hardware used in microprocessors but what’s the difference, especially when someone says that TLB is also a type of… Read More
Basics of Relational model: Relational Model  Relational Algebra is a procedural query language that takes relations as an input and returns relations as an output.… Read More
Basic idea about  relational model and basic operators in Relational Algebra: Relational Model Basic Operators in Relational Algebra Extended operators are those operators which can… Read More
Consider a situation where we have a file shared between many people.   If one of the person tries editing the file, no other person should… Read More
Machine Instructions are commands or programs written in machine code of a machine (computer) that it can recognize and execute. A machine instruction consists of… Read More
Characteristics Used in Connection-oriented communication. It offers error and flows control It is used in Data Link and Transport Layers Stop and Wait for ARQ… Read More
To understand this, you should have an idea about:  ER model  Relation model  After designing the ER diagram of system, we need to convert it… Read More
The relational Model was proposed by E.F. Codd to model data in the form of relations or tables. After designing the conceptual model of the… Read More
  ER Diagram: Entity Relational model is a model for identifying entities to be represented in the database and representation of how those entities are… Read More
Disk scheduling is done by operating systems to schedule I/O requests arriving for the disk. Disk scheduling is also known as I/O scheduling. Disk scheduling… Read More
Structured Query Language is a standard Database language which is used to create, maintain and retrieve the relational database. Following are some interesting facts about… Read More
We have discussed the following topics on Syntax Analysis.  Introduction to Syntax Analysis Why FIRST and FOLLOW? FIRST Set in Syntax Analysis   FOLLOW set is a concept… Read More
In address bar of a browser, have you noticed either http:// or https:// at the time of browsing a website? If neither of these are… Read More
Many folks get confused between these two terms which are associated with the Web. Are they really same? First thing first. HTML is a Language… Read More

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