Technology MCQs

✅ The correct answer is option A.
Phil Zimmermann created the first version of PGP encryption in 1991. Pretty Good Privacy (PGP) is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting and decrypting texts, E-mails, files, directories and whole disk partitions to increase the security of e-mail communications.

✅ The correct answer is option A.
A collection of atoms or molecules that can be excited to a higher energy state is called an active medium. Before lasing can occur, the active media is “pumped”. The process of raising the atoms in the active media from a lower energy state to a higher state is like pumping water up from a well.

✅ The correct answer is option D.

✅ The correct answer is option A.
According to many stories surrounding the origin of the compact disc, 74 minutes was settled on because it would comfortably contain all of Beethoven’s 9th symphony on one disc. Although some stories reference a specific Sony higher-up who claimed this as his favorite piece of music, stories differ. All that’s known for sure is that Sony insisted on this and won out over Phillips’ original 60 minute proposal.

✅ The correct answer is option C.
This voltage often remains in storage even if the set is unplugged. Although the voltage is very high it has very low power but it can be dangerous because your body jumps if brought in contact.

✅ The correct answer is option A.
The terminals of FETs are called gate, drain and source. You might be more familiar with bipolar junction transistors (BJTs), which have terminals called base, collector and emitter. FETs were conceptualized first, but BJTs were easier to produce and so developed sooner.

✅ The correct answer is option A.

✅ The correct answer is option B.
Twisting the yoke will tilt the picture. A projection color television uses three picture tubes and yokes for red, green and blue light.

✅ The correct answer is option D.

✅ The correct answer is option B.
PAL and SECAM are standards used in other countries. RGB stands for red, green, and blue – the colors of light used to create an image in a color tv set and is often used as a format name for computer monitors.