Boolean expressions, Data converters and semiconductor memories

What is the 2’s complement of binary number 011010?

• 100110

• 100101

• 011011

• 101010

The Boolean expression A+A′B simplifies to:

• A+B

• A

• B

• AB

According to the Complement Law:

• A+A′=0

• A⋅A′=1

• A+A′=1

• A⋅A′=A

Which of the following is true by DeMorgan’s theorem?

• (A+B)′=A′+B′

• (A⋅B)′=A′⋅B′

• (A+B)′=A′⋅B′

• (A⋅B)′=A′+B′

The absorption law states:

• A+AB=A

• A(A+B)=A

• Both (a) and (b)

• None of the above

An 8-bit DAC has a full-scale output voltage of 10.24 V. What is its resolution?

• 20 mV

• 40 mV

• 10 mV

• 80 mV

Which type of ADC is the fastest?

• Successive Approximation

• Flash ADC

• Dual Slope

• Counter Type

Which memory is volatile?

• ROM

• EPROM

• SRAM

• Flash

DRAM stores data using:

• Flip-flops

• Capacitors

• Magnetic cells

• Floating gates

Which memory is programmed once and cannot be erased?

• PROM

• EPROM

• EEPROM

• Flash