Test 2 Flashcards
The decimal system uses the number 9 as its base.
F
To express a number in binary requires fewer digits than in the decimal system.
F
In the Gray code there is a maximum of one bit change between two consecutive numbers.
T
The radix of a number system is the same as the base.
T
All gates are devices that have one input with which they perform logic decisions and produce a result at one or more of their outputs.
F
Only one input to an OR gate must be 1 to produce a 1 output.
T
The AND function, implemented using switches, will mean switches connected in parallel.
F
A two input OR function, expressed as a Boolean equation, would be Y = AB.
F
Hardwired logic is fixed and is changeable only by altering the way devices are connected.
T
There is no difference between a relay schematic and a ladder logic program.
F
12 in decimal
12
The binary number 101 has the decimal equivalent of:
5
One byte =
8 bits
The main advantage of using the Gray code is:
Only one digit changes as the number increases.
All digital computing devices operate using the binary number system because:
Digital circuits can be easily distinguished between two voltage levels.
