. Which of the following technology is used by Bluetooth operations ?
ক) Magnetic
খ) Optical
গ) Radio Frequency
ঘ) laser
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ক) Takes much time to load a program
খ) Disk access time is faster
গ) Gives abnormal error message
ঘ) Inadequacy in system memory
ক) *.*
খ) *.doc
গ) N.doc
ঘ) N*.doc
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