shareengineer: August 2012

DBMS Objective Type Questions
Database concepts respect to Datastructures

SQL SERVER Interview Questions

SQL SERVER 2008 Interview Questions

Operating Systems

Networks and Unix

Core Java Questions

C++ Interview Questions

C++ Questions-1

All in one Technical Interview Questions

HOW TO CRACK THE INTERVIEW

C Programming E-book

C Question Bank

C Interview Questions

Object-Oriented Programming With C++ (E Balaguruswami)

PPt on Basic Computer system Architecture

Introduction to automata and compiler design text book by ulman

All lectures on Computer network

Object oriented and analysis book

Principles of communication/sanjay sharmaLet us C solutions Download PDF (yashwant kanetkar)

Wednesday, August 22, 2012

arithmetic and geometric means

Question 1
A group of students were proceeding on an education excursion. One of the students told:
The arithmetic mean of 2 numbers is 32.5 and their geometric mean is 30. One of the numbers will be
a) 20 b) 42 c) 12 d) none of these.
Answer : a) 20
Solution :
Let the numbers be x and y
Arithmetic mean of the two numbers 32.5
Then, (x+y) / 2 = 32.5
So, x + y = 65 or y = 65 - x ...(1)
Geometric mean of x and y = √ xy = 30
Hence xy = (30)² = 900
Substituting the value of y from equation 1 in the above equation we get,
x (65-x) = 900
or x² -65x = 900
x² – 65x -900 = 0
(x-45)(x-20) = 0
Hence x = 45 or 20
Or y = 20 or 45
Question 2
A group of teachers and students were proceeding on an education excursion. One of the students told:
The arithmetic mean of 2 numbers is 50 and their geometric mean is 40. LCM of the numbers will be.
a) 150 b) 120 c) 100 d) 80
Answer : d) 80
Solution :
Arithmetic mean of two numbers = 50
Let the numbers be x and y
Then (x + y) / 2 =50
(x + y) = 100 or y = 100 - x ...(1)
Geometric mean of x and y = √ xy = 40
Hence xy = (40)² = 1600
Substituting the value of y from equation 1, we get,
x (100-x) = 1600
or x² -100x = 1600
x² – 100x -1600 = 0
(x-80)(x-20) = 0
Hence x = 80 or 20
Y = 20 or 80
if x = 80, then y = 20 and vice versa. LCM of 80 and 20 is 80, which is our answer.
Hence answer d) 80
Question 3
Ramasamy, Kuppuswamy and Govindaswamy are close friends. They use to discuss politics, sports, cinema, drama, literature and maths from time to time. Once Kuppuswamy had a doubt he posed this problem to the other two: “The arithmetic mean of 2 numbers is 39 and their geometric mean is 15. What will be the difference between the two numbers.
a) 72 b) 48 c) 56 d) 23
Answer : a) 72
Solution :
Arithmetic mean of two numbers = 39
Let the numbers be x and y
Then (x +y)/2 =39
(x + y) = 78 or y = 78 - x ...(1)
Geometric mean of x and y = √ xy = 15
Hence xy = (15)² = 225
Substituting the value of y from equation 1, we get
x (78-x) = 225
or x² -78x = 225
x² – 78x - 225 = 0
(x-75)(x-3) = 0
Hence x = 75 or 3
y = 3 or 75
One of the numbers will be 75 and the other will be 3. Therefore, difference = 75 - 3 = 72
Hence answer is choice a) 72.

B.E / B.TECH / M.E / M.TECH RESULTS

ANNA UNIVERSITY B.E/B.TECH/ME/M.TECH RESULTS

Pages

Translate

Wednesday, August 29, 2012

Monday, August 27, 2012

Fedora 14 Installation steps

KERNAL CONFIGURATION, COMPILATION AND INSTALLATION

Aim - Download / access the latest kernel source code from kernel.org, compile the kernel and install it in the local system. Try to view the source code of the kernel

CREATING VIRTUALIZATION USING QEMU IN FEDORA - 17

Creating virtualization using Qemu. For simplicity DOS is installed over Fedora Operating System.

INTRODUCTION TO PACKET MANAGEMENT

Given a set of RPM or DEB, how to build and maintain, serve packages over http or ftp. And also how do you configure client systems to access the package repository.

INSTALLING VARIOUS SOFTWARE PACKAGES - SAMBA

Installing SAMBA. Configure samba and share files from windows to linux and vice versa.

INSTALLING VARIOUS SOFTWARE PACKAGES CUPS - COMMON UNIX PRINTING SYSTEM

Installing CUPS. Configure CUPS and install a Local or Network Printer.

WRITE USERSPACE DRIVERS USING FUSE

Writing userspace drivers using FUSE. Exposing students to write drivers for handling their own file systems.

TEXT PROCESSING USING PERL

Simple Text Processing - using PERL

CONNECTING PERL WITH MYSQL

Connecting perl with Mysql. Store and Retrieve tables from database.

CONNECTING PHP WITH MYSQL

Connecting PHP with Mysql. Store and Retrieve tables from database.

PROGRAMMING WITH PYTHON

Connecting PYTHON with Mysql. Store and Retrieve tables from database.

SET-UP NETWORK IN FEDORA

Set-up network and configure IP, DHCP, IP Tables, Gateway and Firewall.

Thursday, August 23, 2012

Wednesday, August 22, 2012