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UNIT I: Chapter 1: Introduction to DBMS and ER-Model   Database: collection of related data.
Data: know facts that can be recorded and that have implicit meaning.
DBMS: collection of program that enables user to create and maintain a database.
DBMS = data + set of programs to access/manipulate data

We are offering very important Free NTSE sample papers in pdf format for NTSE aspirant’s better preparation for target exam. Here we have uploaded NTSE stage 1 & stage 2 (SAT, MAT, LCT) sample papers, prepared by the subject experts from the ALLEN Career Institute.

Anna University, Chennai  Department of Mechanical Engineering ME2202 Engineering Thermodynamics Important Questions 1. A paddle wheel fixed to a shaft of an engine revolves in a closed hollow vessel containing water. This closed vessel is connected freely on the shaft and restraint to its turning moment is proved by mass attached to its side. Find the temperature rise for the following observations. Engine rpm = 650, Load applied = 60 kg at…

The first PUC Model question papers for the new 2013 syllabus is given below. The revised syllabus and exam pattern is up the current date. The model papers have been segregated for the practicals and the final examination. By checking this out you will have a clear picture on what you will need to study in order to obtain high marks in your own PUC examinations. 1. Who predicted the existence of…

1. State merits and demerits of moving average method. Ans. Merits: a)it is simple to understand. b)it is more flexible than any other methods. Demerits: a) no trend values in the beginning and in the end. b) choice of period of moving average is difficult. 2. Define Interpolation and extrapolation. Ans. Interpolation is the technique of estimating the value of the depending variable (y)for any intermediate value of the independent variable(x) Extrapolation…

Human DNA ØOne copy of Homo sapiens DNA contains three billion base pairs located on 23 chromosomes. It codes for approximately 50,000 genes. ØSo, only a few percent of our DNA actually codes for protein! 1.DNA that codes for protein. Exons 2-3{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190} 2.Non-coding single copy. Intron DNA 70{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190} 3.Non-coding repetitive DNA. 30{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190}. Of this:- 2/3 Randomly repetitive (or 20{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190} total DNA) 1/3 Tandemly repetitive (or 10{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190} total DNA) Randomly repetitive An interesting…

  This chapter deals with the study of the following : • Logic Levels • Logic Families • Integration Levels • Switching Times • Propagation Delay • Fan-in and Fan-out Normally Binary Logic Values are defined as either Logic ‘1’or Logic ‘0’ depending on the level of the output voltage. Another additional (intermediate value ) is the ‘Undefined value’. Logic levels can either be Positive logic or Negative Logic. For eg: In…

Digital Communication Sampling Theorem Notes