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3. Find the answers to the questions:

1. What is a common part of most operating systems on desktop computers?

2. Most computers today have something like 64 or 128 megabytes of RAM (random-access memory) available for use by the CPU, don’t they?

3. Can the computer with virtual memory look for areas of RAM that have not been used recently?

4. Why can virtual memory provide a nice economic benefit?

5. What is the key to handle everything you tend to work on simultaneously?

4. Complete the sentences.

1. Virtual memory has become so common because it …

2. If you load the Windows operating system, an e-mail program, a Web browser and word processor into RAM simultaneously, 64 megabytes is not enough …

3. The area of the hard disk that stores the RAM image is called …

4. Of course, the read/write speed of a hard drive is …

5. If your system has to rely too heavily on virtual memory, you will notice …

5. Match the following English words with their Ukrainian equivalents.

Монохромна система, графічний адаптер, крихітна точка, буфер обміну, палітра кольорів, переповнення пам’яті, розширення імені файлу, файл віртуальної пам’яті, прикладна програма, віртуальна пам’ять.

6. True or false statements.

1. Virtual memory is a common part of hardware of desktop computers.

2. Most computers today have something like 600 megabytes of RAM (random-access memory) available for use by the CPU.

3. The operating system deletes data from the page file and RAM.

4. When you have enough RAM for your needs, virtual memory works beautifully.

5. When you have enough RAM for your needs the operating system has to constantly swap information back and forth between RAM and the hard disk.

7. Translate from English into Ukrainian.

  1. Virtual memory is a computersystem technique which gives an application program the impression that it has contiguous working memory (an address space), while in fact it may be physically fragmented and may even overflow on to disk storage.

  2. Systems that use this technique make programming of large applications easier and use real physical memory (e.g. RAM) more efficiently than those without virtual memory.

  3. Virtual memory differs significantly from memory virtualizationin that virtual memory allows resources to be virtualized as memory for a specific system, as opposed to a large pool of memory being virtualized as smaller pools for many different systems.

  4. Note that "virtual memory" is more than just "using disk space to extend physical memory size" - that is merely the extension of the memory hierarchyto includehard disk drives.

  5. Extending memory to disk is a normal consequence of using virtual memory techniques, but could be done by other means such as overlaysor swapping programs and their data completely out to disk while they are inactive.

  6. The definition of "virtual memory" is based on redefining the address space with a contiguous virtual memory addresses to "trick" programs into thinking they are using large blocks of contiguous addresses.

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