System Software Key Terms

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Across
  1. 3. Part of a program being executed
  2. 9. A software platform that provides a platform/environment for programs to be run which are of benefit to a user
Down
  1. 1. A software which allows the user to boot up and use another OS (the guest) running from within their existing OS (the host)
  2. 2. A way of representing mathematical expressions and the order in which they should be carried out
  3. 3. The perpetual loading/unloading of pages due to a page from a disk immediately requiring the page it replaced which can cause a lot of inefficiency
  4. 4. Small blocks of fixed-size of physical memory in the RAM
  5. 5. The first code that is executed when the computer system is started
  6. 6. A paging mechanism that allows a program to use more memory addresses than are available in main memory
  7. 7. A signal from a device or source seeking the attention of the processor
  8. 8. A representation of identifiers using recursion