Chương 2 - hoàn thành câu

1. Part of the work of mainframe operating systems is to

manage multiple resources and handle massive amounts of input and output transactions.

2. One of the key functions of the operating system is to

provide a user-friendly interface and allocate system resources efficiently to running programs.

3. The role of the operating system is to

control the hardware components and allow software applications to interact with them seamlessly.

4. An additional role is to

ensure system security and protect users' private files from unauthorized access or modification.

5. An operating system is a set of programs that

manages computer hardware resources and provides common services for various application software.

6. An operating system lies

between the application software and the computer hardware, acting as an intermediary layer.

7. Besides controlling the entire operating system,

the kernel also manages memory access and schedules CPU tasks for all applications.

8. An important function of the operating system

is to coordinate how different programs use the central processing unit and memory.

9. The main reason for installing more memory

is to improve the overall system performance and run multiple heavy applications simultaneously.

10. The task in most cases of the operating system

is to manage system resources and hide the complexity of the hardware from users.

11. If you don't have the source code to a program

you cannot easily modify its functions, fix bugs, or recompile it for different architectures.

12. Looking after ‘cache coherency’ means

ensuring that shared data remains consistent across multiple local caches in a multiprocessor system.

13. The ‘write-back’ cache allows

the processor to write data directly to the cache instead of the main memory.

14. ‘Dirty cache’ tells the cache controller to

write modified blocks of data back to main memory before they are replaced.

15. Disk caching works in essentially the same way whether

the cache is integrated on the hard drive or managed by the system memory.

16. If the requested information isn't in the cache

the system must retrieve the necessary data from the much slower main memory storage.

17. ALT+TAB allows you to

switch quickly between open applications and active windows currently running on your computer system.

18. ALT + PRINT SCREEN lets you

capture an image of the currently active window and copy it to the clipboard.

19. If you press Ctrl + Alt + Del in Windows 98,

it opens the Close Program dialog box, allowing you to shut down frozen tasks.

20. If you press Print Screen,

the computer captures the entire screen and copies the image directly to your system clipboard.

21. If you added more memory,

your computer would run faster and could handle more complex software applications at once.

22. If you hold down the mouse button over an icon,

you can drag the item to a new location or select multiple file objects.

23. If you used an LCD display,

you would save energy and reduce eye strain compared to using a bulky CRT monitor.