264- Binary, HEX & ASCII Study Guide- Quiz Questions-Spiker.J

Bit

A bit is a single numeric value, either "1" or "0"; encodes a single unit of digital information.

Byte

A byte is a sequence of bits. In one byte there are eight bits; one character occupies eight bits of memory.

Word

A defined and specific number of digits grouped together. For most PLCs, a word consists of 16 digits.

Binary

Binary is a numbering scheme in which there are only two possible values for each digit.

Nibble

Four bits in a series, or half of an 8 bit byte.

Hexadecimal

Hexadecimal is built using 16 digits; 0-9 and A-F. Digits A-F represent values of 10-15; called the 16-base numbering system; represent large numbers with relatively few digits compared to decimal system.

What are high nibbles?

High nibbles are bits 4-7.

ASCII

In ASCII, every letter, number and puncuation symbol has a corresponding number, or ASCII code.

Base 2

Known as binary system; only as two digits, 0 and 1

What are low nibbles?

Low nibbles are bits 0-3.

Base 10

Most commonly used number system. It's also known as the decimal system. It uses ten digits, 0-9.

Mega

Represents numeric value 1,048,576; 2^20

Giga

Represents numeric value 1,073,741,824; 2^30

Tera

Represents numeric value 1,099,511,627,776; 2^40

Peta

Represents numeric value 1,125,899,906,842,624; 2^50

What is the easiest way to convert HEX to text?

Simply look at the ASCII chart.

How many standard ASCII codes are there?

There are 128 standard ASCII codes.

The number of possible values for Base 2.

There are 256 possible values; they are 0-255.

How many bytes are there per character?

There is 1 byte for each character/space.

Why are upper and lower case HEX values different?

They have to be different otherwise there would be no way to figure out what is to be lowercase & what should be uppercase.

Kilo

This represents numeric value 1024; 2^10

True or False: Upper and lower case letters for HEX values are different.

True

Unicode

Unicode is an international encoding standard for use with different languages and scripts, each letter, digit or symbol is assigned a unique numeric value that applies across different platforms and programs.

Base 16

Used in hexadecimal. Uses the digits 0-9 and A-F to represent values.

What is the order of prefixes from smallest to largest?

kilo, mega, giga, tera, peta