Digital Logic circuits CIA-1

The base of hexadecimal number system is:

• 2
• 8
• 16
• 10

The 1’s complement of binary number 10101 is:

• 10101
• 1010
• 11111
• 101

A Hamming code can detect and correct:

• Single error only
• Double error only
• Single error and detect double error
• Multiple errors

Which of the following codes is not a weighted code?

• 8421 BCD
• Excess-3
• Gray code
• 2421 code

The minimum number of parity bits required to detect a single error in 7 data bits is:

• 2
• 3
• 4
• 5

The decimal number (725)₈ in decimal is:

• 469
• 471
• 473
• 475

The advantage of TTL logic family over RTL is:

• Lower power dissipation
• Faster switching speed
• Higher noise margin
• All of the above

Which digital logic family is the fastest?

• RTL
• TTL
• ECL
• MOS

In MOS logic family, the main advantage is:

• Low cost and high density
• High speed
• High power consumption
• None

Which digital logic family consumes the least power?

• TTL
• CMOS
• ECL
• RTL