Numbers We Use in Digital Electronics
A word contains
16 bits
The binary number 101010 equals 25 in decimal.
False
The hexadecimal number system uses 18 symbols.
False
Digital electronic devices use a number system called the binary number system.
True
Generally the weight or value of each place in the binary number system is referred to as a power of two.
True
What is the octal equivalent to the decimal number 15?
17
What is the decimal equivalent to the hexadecimal number FF?
255
A decoder is a logic device that translates from binary code to decimal.
True
Hexadecimal notation is widely used in microprocessor-based systems to represent 4-, 8-, 16-, 32-, or 64- bit binary numbers.
True
In the hexadecimal number system, the letter A stands for decimal ten.
True
Octal numbers are also referred to as base eight numbers.
True
The binary number 1100 represents the decimal number 12.
True
The octal number system uses 8 symbols.
True
A code that uses symbols to refer to a number of items is called
a number system
The device that translates from keyboard decimal numbers to binary is called
an encoder
The binary number system is sometimes called the
base 2 system
The binary number 1011 is equal to the decimal number
11
What is the decimal equivalent for the hexadecimal number 2F?
47
Which of the following is an advantage of the octal number system?
it is used extensively to convert directly from a3-bit binary number
When working with a varied number systems, what type calculator should be used?
scientific
Calculators and computers understand only decimal numbers.
False
The decimal number system uses only two symbols 0 and 1.
False
In computer software, to encode means to convert encrypted codes into readable numbers or text.
False
In modern electronic systems, the encoding and decoding may be performed only by software.
False
A 64-bit group of data is called a nibble.
False
A quad-word contains 64 bits.
True
An 8-bit binary number is called a bit.
False
Analog electronic devices use a number system called binary.
False
The hexadecimal number system uses 10 symbols.
False
A single binary number (either a 0 or a 1) is called a
bit.
The repeated divide-by-2 process is used when you want to convert
decimal to binary