Tutorial 1

Q1: Compare and contrast between multiprocessors and multicore Multicore – Dual-core processor has two cores (e.g. AMD Phenom II X2, Intel Core Duo), – Quad-core processor contains four cores (e.g. AMD Phenom II X4, intel's quad-core processors, see i3, i5, and i7 at Intel Core), – Hexa-core processor contains six cores (e.g. AMD Phenom II X6, Intel Core i7 Extreme Edition 980X), – Octa-core processor contains eight cores (e.g. Intel Xeon E7-2820). wikipedia

Q2 : List and discuss different compilers for Java programming language. A Java compiler is a compiler for the Java programming language. The most common form of output from a Java compiler is Java class files containing platform-neutral Java bytecode. There exist also compilers emitting optimized native machine code for a particular hardware/operating system combination. As of 2010, the following are major Java compilers: – Javac "java-see", included in JDK from Sun Microsystems, open-sourced since 13 November – GNU Compiler for Java, a part of the GNU Compiler Collection, which compiles C, Fortran, Pascal and other programming languages besides Java. It can also generate native codeusing the back-end of GCC. – ECJ, the Eclipse Compiler for Java, is an open source incremental compiler used by the Eclipse project.

Exercise Go to command prompt: – Open a notepad and write the following code. Save it as HelloWorld.java class HelloWorld { public static void main(String args[]) { System.out.println("Hello World!"); }

Exercise Run Command Prompt (found under All Programs/Accessories in the Start menu). Type – C:\> cd \mywork This makes C:\mywork the current directory. – C:\mywork> dir This displays the directory contents. – You should see HelloWorld.java among the files. – C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin This tells the system where to find JDK programs. – C:\mywork> javac HelloWorld.javaThis runs javac.exe, the compiler. – You should see nothing but the next system prompt... – C:\mywork> dir javac has created the HelloWorld.class file. – You should see HelloWorld.java andHelloWorld.class among the files –.C:\mywork> java HelloWorld This runs the Java interpreter. – You should see the program output:Hello, World! – If the system cannot find javac, check the set path command. – If javac runs but you get errors, check your Java text. – If the program compiles but you get an exception, check the spelling and capitalization in the file name and the class name and the java HelloWorld command. Java is case-sensitive!