1. Modem stand for?

Modulator Demodulater.
A modem (modulator-demodulator) is a device or program that enables a computer to transmit data over, for example, telephone or cable lines.

2. What VVVF stand for?

Variable Voltage Variable Frequency.
It is a method of controlling the speed of an AC induction motor, whereby speed, current and torque can all be accurately controlled.

3. EPROM stand for?

Erasable Programmable Read Only Memory.
A chip found in alomst every microprocessor.

4. 'CD' abbreviation computer usually means?

Compact Disc.
Compact disc (CD) is a digital optical disc data storage format. The format was originally developed to store and play only sound recordings but was later adapted for storage of data (CD-ROM).

5. How many bits is in a byte?

The byte (/ˈbaɪt/) is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.

6. Tell me what does AC and DC stand for in the electrical field?

Alternating Current and Direct Current.
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.

8. As input used by an antenna or cable to a TV set uses frequencies called?

RF is radio frequency. IF is intermediate frequency used inside the TV for processing. AF is audio frequency. SAP is second audio program which may have another language or other soundtrack as an option to the main soundtrack.

9. Tell me Compact discs, (according to the original CD specifications) hold how many minutes of music?

74 mins.
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.