66.

What was the active medium used in the first working laser ever constructed?
A. A diamond block B. Helium-neon gas
C. A ruby rod D. Carbon dioxide gas
Answer and Explanation
Answer:C
Explanation: Theodore Maiman built the first working laser using a ruby rod while working at Hughes Research Laboratories in Malibu, California. It lased for the first time on May 16, 1960.
67.

What does EPROM stand for?
A. Electric Programmable Read Only Memory B. Erasable Programmable Read Only Memory
C. Evaluable Philotic Random Optic Memory D. Every Person Requires One Mind
Answer and Explanation
Answer:B
Explanation: A chip found in alomst every microprocessor...