Technology Questions and Answers

Answer: D

RAM is primary storage.

Primary storage is the memory the processor can address directly and read in nanoseconds. It is volatile, losing its contents when power is removed, which is why work must be saved to secondary storage.

Answer: B

The country code for the United Kingdom is .uk.

Unusually, the ISO code for the country is GB, but UK was adopted for the domain and retained. Registrations are commonly at the second level, as .co.uk or .ac.uk.

Answer: A

RAM stands for random access memory.

Any location can be read or written in the same time, regardless of position - unlike tape, which must be wound through. It is volatile: its contents vanish when power is removed.

Answer: D

AOL stands for America Online.

It was the dominant consumer internet service of the 1990s in the United States, its CDs mailed to millions of households. Its merger with Time Warner in 2000 is often cited as the worst in corporate history.

Answer: C

A CD samples at 44.1 kHz.

By the Nyquist theorem a sampling rate must be more than twice the highest frequency to be recorded; human hearing reaches about 20 kHz, so 44.1 kHz captures it with a margin for the anti-aliasing filter.

Answer: B

A virus that attacks anti-virus software to avoid detection is a retrovirus.

It disables the scanner, corrupts its signature database or blocks its updates. The name is borrowed from biology, where a retrovirus subverts the host's own machinery.

Answer: A

Flash memory is a type of electrically erasable programmable read-only memory.

It is erased in blocks rather than byte by byte, which makes it much faster than earlier EEPROM. It holds its contents without power, and is what USB drives, SSDs and memory cards are made of.

Answer: C

The squirrel cage motor cannot be used as a DC machine.

It is an induction motor: it works only on alternating current, whose changing field induces current in the rotor bars. Permanent magnet, series and synchronous machines can all be built to run on direct current.

Answer: D

AOL stands for America Online.

It was the dominant consumer internet service of the 1990s in the United States, its CDs mailed to millions of households. Its merger with Time Warner in 2000 is often cited as the worst in corporate history.

Answer: C

A component made of carbon or similar material to oppose the flow of current is a resistor.

Its value follows Ohm's law, \( V = IR \), and it dissipates the energy as heat. Chokes and inductors oppose changes in current rather than current itself, and capacitors block direct current entirely.