Notes: Page- 6

Discuss the impact of the wireless environment on networks. Explain the concept of spread spectrum, widely used in WLAN technologies. Provide an overview of current fixed and mobile wireless technologies. Introduce the basic operation of IEEE 802.11 and Bluetooth WLANs/WPANs.

Why Terrestrial Wireless : 1. Alternative to fibre and copper wire 2. New technology: deliver today´s services and meet tomorrow´s demands 3. Low start-up costs: need to install base stations only,"pay as you go", viable for low penetration rates Near Future: 1. Terrestrial broadband systems licensed and starting to roll out around the world. 2. Broadband Multimedia Satellite systems beginning services this year with many more to be launched the next 5 years, providing global broadband access.

Files are places where data can be stored permanently. Some programs expect the same set of data to be fed as input every time it is run. Cumbersome. Better if the data are kept in a file, and the program reads from the file. Programs generating large volumes of output. Difficult to view on the screen. Better to store them in a file for later viewing/ processing

1. Write a program to execute three POSIX Threads (PThreads) simultaneously for updating a text file. 2. Write a program for synchronizing POSIX Threads (PThreads) using (a) Semaphore (b)Mutex 3. Implement the PRAM Algorithm for (a) Parallel Reduction (b) Prefix Sums (c) Preorder Tree Traversal 4. Implement Parallel Matrix Multiplication using (a) Row-Column oriented Algorithm (b)Block-Oriented Algorithm 5. Implement Solution of Linear Systems using (a) Gaussian Elimination (b)Jacobi Algorithm 6. Implement (a) Parallel Quick Sort (b) Hyper Quicksort 7. Implement Parallel Fast Fourier Transform Algorithm

1. Write a Program in RMI by which Client send hello message to Server. 2. Write a Program in RMI by which you can add two numbers. 3. Implementation of a Gross server in RMI. Gross server calculates the basic salary, HRA, DA passed by the client & returns it to client. 4. Implementation of a File access server in RMI. File server returns the content of a file that is stored on that server to client when requested by the client. 5. Implementation of a DNS server in RMI. DNS server returns the IP address of a text URL to client, passed by the client to server in request. 6. Write a Program in RMI in which client send a message to a sever and server stores it in the file at server machine. 7. Implementation of a Authentication server in RMI. client passes the username and password to server; server verifies it and sends the status of authentication to client.

This document file contains 30 questions based on very basics of java. It has multiple choice type questions and each question has it's one correct answer. Correct answer for each question are also mentioned. This quiz is for beginners of java or to check the logical mind of the student.

This document file contains array question based on core java. It has multiple choice type questions. Each question has it's correct answer and the explanation for each question i.e. how a particular answer is correct. e.g.: What will be the output of the program? public class Foo { public static void main(String[] args) { try { return; } finally { System.out.println( "Finally" ); } } } A.Finally B.Compilation fails. C.The code runs with no output. D.An exception is thrown at runtime. Answer: Option A Explanation: If you put a finally block after a try and its associated catch blocks, then once execution enters the try block, the code in that finally block will definitely be executed except in the following circumstances: 1. An exception arising in the finally block itself. 2. The death of the thread. 3. The use of System.exit() 4. Turning off the power to the CPU.

This document file contains array question based on core java. It has multiple choice type questions. Each question has it's correct answer. e.g.: 1.If we declare int [ ] ar = {1,2,3,4,5,6}; The size of array ar is: A. 0 B. 5 C. 6 D. 7 Answer: C 2. What would display from the following statements? int [ ] nums = {1,2,3,4,5,6}; System.out.println((nums[1] + nums[3])); A. 6 B. 2+4 C. 1+3 D. 4 Answer: A

1. Google's OHA (Open Handset Alliance): The first truly openand comprehensiveplatform for mobile devices, all of the software to run a mobile phone but without the proprietary obstaclesthat have hindered mobile innovation. 2. Linux OS kernel 3. Java programming 4. Open source libraries: SQLite, WebKit, OpenGL.

This doc file contains the problem based on time and work. In any Govt. exam like SSC, Bank, etc It's damn sure that there should be some problem in paper. This doc file has also the satisfactory solution for each problem. So you people can revise or practice yourself to perform better in exam. Good Luck!