Technology MCQs

✅ The correct answer is option A.

✅ The correct answer is option A.
The original IBM PC ran at a breathtaking 4.77 MHz (Smmmmmmokin!) Today there are new PC processors that run faster than 3 gigahertz.

✅ The correct answer is option C.

✅ The correct answer is option B.
The word “laser” is actually an acronym for light amplification by stimulated emission of radiation. Atoms or molecules of the active medium that have been excited to a higher energy level are stimulated by a passing photon to relax to a lower energy level and emit a photon that is indistinguishable from the passing photon, thereby increasing the number of photons like the incident one.

✅ The correct answer is option A.

✅ The correct answer is option A.
IBM also created it’s own version of DOS called PC-DOS.

✅ The correct answer is option D.

✅ The correct answer is option A.
Electricity is voltage and current. Voltage is electrical pressure, and current is the flow of charged particles. The difference between alternating current (AC) and direct current (DC) is that the electrons in an AC circuit regularly reverse their direction. In a DC circuit electrons always flow in the same direction.

✅ The correct answer is option B.
Some authorities are recommending TV’s, VCR’s and Stereo’s be connected to power strips with switches and turned off when not in use to save energy. Your remote will not work until power is switched back on.

✅ The correct answer is option D.
Before the invention of word processing and spreadsheet software, personal computers had little value in the mainstream business world. WordStar was used before the days of function keys and the mouse. It, instead, used a set of Ctrl and Alt key combinations to navigate and edit text documents.