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The design and use of single-table databases: − fields − records − validation The use of basic data types: − text/alphanumeric − character − boolean − integer − real − date/time The identification, purpose and use of: − primary key SQL scripts − used to query data stored in a single-table database

The design and use of single-table databases: − fields − records − validation The use of basic data types: − text/alphanumeric − character − boolean − integer − real − date/time The identification, purpose and use of: − primary key SQL scripts − used to query data stored in a single-table database

The design and use of single-table databases: − fields − records − validation The use of basic data types: − text/alphanumeric − character − boolean − integer − real − date/time The identification, purpose and use of: − primary key SQL scripts − used to query data stored in a single-table database

The design and use of single-table databases: − fields − records − validation The use of basic data types: − text/alphanumeric − character − boolean − integer − real − date/time The identification, purpose and use of: − primary key SQL scripts − used to query data stored in a single-table database

Validation and verification checks when data is input: − range check − length check − type check − presence check − format check − double Entry − screen/visual check Use of different types of test data including: − normal − abnormal/erroneous − extreme − boundary

Validation and verification checks when data is input: − range check − length check − type check − presence check − format check − double Entry − screen/visual check Use of different types of test data including: − normal − abnormal/erroneous − extreme − boundary

Methods of data transmission: − data packets − structure of data packets − packet switching − serial, parallel, simplex, half-duplex and full-duplex − universal serial bus (USB) Error detection method: − parity checks − checksum − echo checks − Automatic Repeat Requests (ARQ) Encryption: − symmetric − asymmetric

Methods of data transmission: − data packets − structure of data packets − packet switching − serial, parallel, simplex, half-duplex and full-duplex − universal serial bus (USB) Error detection method: − parity checks − checksum − echo checks − Automatic Repeat Requests (ARQ) Encryption: − symmetric − asymmetric

Methods of data transmission: − data packets − structure of data packets − packet switching − serial, parallel, simplex, half-duplex and full-duplex − universal serial bus (USB) Error detection method: − parity checks − checksum − echo checks − Automatic Repeat Requests (ARQ) Encryption: − symmetric − asymmetric

Data Transmission - Part 4 - 2025

Methods of data transmission: − data packets − structure of data packets − packet switching − serial, parallel, simplex, half-duplex and full-duplex − universal serial bus (USB) Error detection method: − parity checks − checksum − echo checks − Automatic Repeat Requests (ARQ) Encryption: − symmetric − asymmetric

Methods of data transmission: − data packets − structure of data packets − packet switching − serial, parallel, simplex, half-duplex and full-duplex − universal serial bus (USB) Error detection method: − parity checks − checksum − echo checks − Automatic Repeat Requests (ARQ) Encryption: − symmetric − asymmetric

Methods of data transmission: − data packets − structure of data packets − packet switching − serial, parallel, simplex, half-duplex and full-duplex − universal serial bus (USB) Error detection method: − parity checks − checksum − echo checks − Automatic Repeat Requests (ARQ) Encryption: − symmetric − asymmetric

The internet and World Wide Web (WWW): − differences between the internet and the World Wide Web − meaning of uniform resource locator (URL) − purpose and operation of hypertext transfer protocols (http and https) − purpose and function of a web browser − how web pages are located, retrieved and displayed − types of cookie Digital currencies: − how digital currencies are used − the process of b...

The Internet - Part 4 - 2025

The Internet - Part 3 - 2025

The Internet - Part 2 - 2025

The Internet - Part 1 - 2025

Hardware - Logic Gates - Part 5

Hardware - Logic Gates - Part 4

Hardware - Logic Gates - Part 3

Hardware - Logic Gates - Part 2

Hardware - Logic Gates - Part 1

Processor Fundamentals - Assembly Language - Part 6

Databases - Part 7

Databases - Part 6

Databases - Part 5

Databases - Part 4

Databases - Part 3