design finals 1 Keyterms

Question 1

data representation

Answer 1

The way that binary codes are used to represent different types of data

Question 2

Encryption

Answer 2

A way to convert normal text to a secret code

Question 3

Descryption

Answer 3

The process of converting encrypted data back to plain text

Question 4

Original text

Answer 4

A source code/plain text

Question 5

Cypher text

Answer 5

A text or code that is convertrd to a secret language that is difficult to understand without a key

Question 6

Substitution cypher

Answer 6

Replaces the original text with another alphabet/number and generates a cypher text

Question 7

Transpose

Answer 7

when we mix up and change the letters of the original text to create a cypher text

Question 8

Modulo 2

Answer 8

A 5 bit binary code

Question 9

ASCII

Answer 9

American standard code for information interchange

Question 10

EBCDIC

Answer 10

extended binary coded decimal interchange code. Extended ASCII

Question 11

Unicode

Answer 11

Universal code, it is enough to translate the whole world

Question 12

Pig pen

Answer 12

Encryption that is done using symbols

Question 13

Database

Answer 13

An organised collection of data

Question 14

Field

Answer 14

A single item of data

Question 15

Record

Answer 15

A collection of related fields

Question 16

Table

Answer 16

A set of data organised in rows and columns

Question 17

Keyfield

Answer 17

Uniquely identifies each record in a database

Question 18

Boolean expression

Answer 18

A logical expression that produces a true or false statement

Question 19

Boolean operator

Answer 19

AND, OR, and NOT

Question 20

Database query

Answer 20

a code sent to a database to get information from the database

Question 21

Redundant data

Answer 21

Duplicated data occurs when information is stored more than once in a database, which leads to inconsistency

Question 22

Verification

Answer 22

Checking that the data in a database matches the data like it was originally captured

Question 23

validation

Answer 23

automatic checks done on database to ensure that the database’s information is sensible

Question 24

Foreign key

Answer 24

a foreign key links tables in a relational database by connecting a field in one table to the primary key in another

Question 25

SQL

Answer 25

Structure query language

Question 26

query

Answer 26

A question asked by the user

Question 27

Linear search

Answer 27

Linear search repeatedly divides the list until the element is found

Question 28

Binary search

Answer 28

Binary search splits the list infi 2 parts using the midpoint (only works on sorted lists)

Question 29

Logic

Answer 29

Facts that are proven

Question 30

Logic gate

Answer 30

Electrical circuit represents logical operations

Question 31

Truth table

Answer 31

To predict the putput of a logic gate

Question 32

Digital circut

Answer 32

Made up of 2 or more logic gates

Question 33

Semi conductor

Answer 33

A material that can conduct electricity up to certain values

Question 34

Transistor

Answer 34

A tint circuit on a circuit board. A chip is made up of thousands of millions of transistors

Question 35

Kits

Answer 35

A base board to build an electric circuit

Question 36

IC/intergrated

Answer 36

Also known as a micro-chip. A number of digital circuits are printed on a singke circuit board

Question 37

Adder

Answer 37

In adding value to making a circuit that can perform additions.

Question 38

Memory

Answer 38

Stores computer data and is responsible to send and access data from the cpu

Question 39

Memory cell

Answer 39

Stores a single bit of information. A memory is made up of thousands of memory cells

Question 40

Latch

Answer 40

Also known as ‘flip-flop’. They are designed using logic gares they can generate high/low states of a circuit and remains the same state until it is reset