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The correct preposition with a specific point of time (like 2015) is "since", not "from". Also, present perfect continuous tense is appropriate here.
The device which store information and are used by the computer for its working are called
Computer Virus is a
________ are used in an e-mail to express emotions of feelings clearly.
What is Linux?
In an operating system, which memory management technique swaps out entire processes to free up memory space?
Which of the following is a popular example of an Operating System?
A new workbook contains how many worksheets by default in MS Excel?
What is the acronym for SMTP?
The largest unit of storage is
The files which are deleted from hard disk goes to