ΠΟΤΕ ΣΠΑΝΙΑ ΜΕΡΙΚΕΣ ΦΟΡΕΣ ΣΥΧΝΑ ΠΟΛΥ ΣΥΧΝΑ 1. 2. 3. 4. 5.
Computers were used primarily for scientific and engineering calculations and were programmed mainly in FORTRAN and assembly language. As computers became more reliable they also became more business orientated, although they were still very large and expensive. Because of the expenditure, the productiveness of the system had to be magnified as to ensure cost effectiveness. Job scheduling and the hiring of computer operators, ensured that the computer was used effectively and crucial time was not wasted. Loading the compliers was a time consuming process as each complier was k... ... middle of paper ... ...or personal computers.
It uses a conventional memory. There is a standard static dataflow model by Dennis from MIT which says that the program memory contains instruction templates which represents the nodes in the dataflow graph. Also it contains an operation code, slots for operands and the destination addresses. There are three other parts to this model. They are Update-unit, Fetch-unit and
San Fransisco: No Starch Press, 2004. Terpistra, J. H. Hardening Linux. Emeryville: McGraw-Hill Professional, 2004. Ward, B. How Linux Works: What Every SuperUser Should Know.
Some of the differences between mainframes and PC's are size, power, ability to dedicate resources, and the amount of data that can be processed. The mainframe is set up for specific applications and those applications only; that is totally different from a PC. For example, you couldn't load Word or Internet Explorer onto a mainframe computer. It is true that, as to processing power, what was a mainframe yesterday is on desktops today, but that is where the similarities end. The Central Processing Unit (CPU) is the brains of the computer where most of the calculations take place and it is the most important element of a computer system.
Parallel computing CHAPTER 3 Parallel Computing Traditionally, one program is written and execute on a single computer and on a single processor. But it can take more time to solve a problem if it is large enough. Hence as an extension to this Single Computation Process, a parallel approach is proposed. In which, same problem is solved either on the different processor of the same computer or on the different computer or the combination of both. The principle behind the Parallel Computing Method is that, large problems are subdivided into smaller ones, and all these sub problems are solved at the same time, either on the same processor or on the different processor .
Java thread is an independent path of execution through programming code. If we execute multiple threads, one thread's path will differ from the rest. For instance, consider an ordinary thread executes the byte code according to if-else statement's if part, meanwhile another thread executes the byte code according to an else part. Here there is a question occuring how JVM (Java Virtual Machine) keeps track of every thread execution. The JVM gives the method called stack to each thread.
Each running process is able to act as if it is the only thing running. The CPUs and memory are virtualized. If a process tries to consume all of the CPU, a modern operating system will pre-empt it and allow others their fair share. Similarly, a running process typically has its own virtual address space that the operating system maps to physical memory to give the process the illusion that it is the only user of RAM. Figure 2 1 Virtualization 2.1 Virtual Machine The first machine to fully support virtualization was IBM’s VM.
Name them no details are required Ans:Dos 1.0, Dos1.1, Dos1.25 DOs2.0 Dos2.1 Dos3.0 Dos3.1 Dos3.2 Dos3.3 Dos4.0 Dos4.01 Dos5.0 Dos5.0a Dos6.0 Dos6.1 Dos6.2 Dos6.21 Dos6.22 Dos7.0 Q:16Name all of the flavors of Linux state difference between them? • Ans: ubuntu ,fedora,linux mint, puppy linux, tinycore, MEPIS LINUX, ZORIN OS Ubuntu is the most popular linux distribution, Fedora is the fourth most popular. Fedora is based on Red Hat Linux while Ubuntu is based on Debian. Q:17 Write down names of five packaged application software? • Ans:MACINTOSH, Windows, Android, Ios, CynagenMOD Q:18Compare UNIX, Linux and windows in form of table, the table should contain five differences.