Unit 1 Exam
A complete digital computer in a single miniature integrated circuit package is referred to as a:
Multiprocessor.
Microprocessor.
Small-scale integrated circuit.
Medium-scale integrated circuit.
Turning a light bulb on and off is utilizing it as a(n):
Analog device.
Digital device.
Which of the following is NOT a digital device?
On/off switch.
Transistor operating in the linear region.
Microprocessor.
RAM and ROM
Select the most correct statement concerning digital devices.
A digital device has a continuously varying output.
Digital devices are always more accurate than analog devices.
Analog outputs can usually be interpreted more accurately than digital devices.
Most digital device outputs represent only two values.
The increased use of digital techniques resulted primarily from:
Military electronic needs.
The desire to reduce costs.
The development of integrated circuits.
Limitations of analog methods.
The largest number that an 8-bit binary number can represent is:
255
256
128
127
The decimal number 23 converts to the binary number?
10011.
10111.
11101.
11001.
The hexadecimal number 7F4B converts to a decimal _____ and binary _____.
32,752; 1101001011111110
32,587; 0111111101001011
32,752; 0111111101001011
32,587; 1101001011111110
The most commonly used code for data transmission is the:
Gray code.
BCD code.
ASCII code.
Excess 3 code.
In BCD, the code 1011 is:
11.
Letter B.
23.
Invalid.
Turning a lamp on and off is using it as a _____ device.
Digital
Analog
The single factor most influential in the increased use of digital techniques was the:
Recognition of the deficiencies in analog methods.
Development of integrated circuits.
Discovery of digital methods.
Developments resulting from the space program.
A constant DC voltage is:
An analog signal.
A digital signal.
Either analog or digital, depending upon how it is defined.
What is the largest decimal number that can be represented with 8-bits and what is the formula used to find the answer?
How many discrete states can be represented with 6-bits and what is the formula used to find the answer?
How many bits does it take to represent the number 3875 base 10 in binary?
2-bits
6-bits
8-bits
12-bits
What number system uses only the digits 0 through 7?
Octal
Hexadecimal
Binary
BCD
The BCD code is better than the binary code because:
It uses less bits.
It is more compatible with the decimal number system.
It is more adaptable to arithmetic computations.
There are more different coding schemes available.
Which code is best for minimum hardware errors?
ASCII.
8421 BCD.
Pure binary.
Gray.
Which BCD code is used for data communications?
Gray.
8421.
ASCII.
Serial data transmission is faster than parallel data transfers.
True.
False.
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