What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?

If there are multiple recycle bin for a hard disk

A. You can set different size for each recycle bin

B. You can choose which recycle bin to use to store your deleted files

C. You can make any one of them default recycle bin

D. None of above

Identify false statement

A. You can find deleted files in recycle bin

B. You can restore any files in recycle bin if you ever need

C. You can increase free space of disk by sending files in recycle bin

D. You can right click and choose Empty Recycle Bin to clean it at once

If the displayed system time and date is wrong, you can reset it using

A. Write

B. Calendar

C. Write file

D. Control panel

You should save your computer from?

A. Viruses

B. Time bombs

C. Worms

D. All of the above