11-14 Years Old
48 modules covering EVERY Computer Science topic needed for KS3 level.
14-16 Years Old
45 modules covering EVERY Computer Science topic needed for GCSE level.
16-18 Years Old
66 modules covering EVERY Computer Science topic needed for A-Level.
The MP3 is a relatively fresh discovery in digital music and sound. Before MP3, there was only the compact disc (CD). The audio on a CD is translated from an analog source like a master tape, but nowadays most audio is saved directly in a digital format. The MP3 process removes those sounds we can’t …
A control system is a type of system that controls the output in order to provide the desired response. It is a group of either electronic or mechanical devices which utilise control loops in order to control other systems or devices. Control systems are automated with the use of computers. It is a vital part …
MIDI, which stands for Musical Instrument Digital Interface, is a connectivity standard for transmitting digital instrument data. It is mainly utilised by computers, electronic keyboards and synthesisers. In addition, it is supported by other instruments like beatboxes, electronic drums, and even digital stringed instruments, like guitars and violins. MIDI is a protocol designed for recording and playing back …
Biometrics comes from the words bio and metric. Bio means life while metric means to measure. The biometric system links an event to one individual, while other ID forms, like the personal identification number (PIN), may be used by anyone. Types of Biometrics Physiological identifiers – associated with the structure of the user is confirmed …
Candidates should be able to: state the purpose of the CPU describe the function of the CPU as fetching and executing instructions stored in memory explain how common characteristics of CPUs such as clock speed, cache size and number of cores affect their performance. What is the purpose and function of the CPU? The purpose …
Candidates should be able to: describe the difference between RAM and ROM explain the need for ROM in a computer system describe the purpose of RAM in a computer system explain how the amount of RAM in a personal computer affects the performance of the computer explain the need for virtual memory describe cache memory …
Candidates should be able to: describe how a DBMS allows the separation of data from applications and why this is desirable describe the principal features of a DBMS and how they can be used to create customised data handling applications. What is a DBMS? A Database Management System (DBMS) is used to manage a database. …
For Software and Operating Systems, candidates should be able to: explain the need for the following functions of an operating system: user interface memory management peripheral management multi-tasking security describe the purpose and use of common utility programs for: computer security (antivirus, spyware protection and firewalls) disk organisation (formatting, file transfer, and defragmentation) system maintenance …
For Data Units, candidates should be able to: define the terms bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte understand that data needs to be converted into a binary format to be processed by a computer. Data units in computer systems Bit This is a single unit of memory and can only store 2 possible binary …
For Image Representation, candidates should be able to: explain the representation of an image as a series of pixels represented in binary explain the need for metadata to be included in the file such as height, width and colour depth discuss the effect of colour depth and resolution on the size of an image file. …
For Sound Representation, candidates should be able to: explain how sound can be sampled and stored in digital form explain how sampling intervals and other considerations affect the size of a sound file and the quality of its playback. How can sound be sampled and stored in digital form? A microphone converts sound waves into …
In regards to computer instructions, candidates should be able to: explain how instructions are coded as bit patterns explain how the computer distinguishes between instructions and data. Computer Instructions: How are program instructions coded? Machine code instructions are binary numbers and are coded as bit patterns, for example, a 16 bit machine code instruction could …
Candidates should be able to: explain the use of binary codes to represent characters explain the term character set describe with examples (for example ASCII and Unicode) the relationship between the number of bits per character in a character set and the number of characters which can be represented. How are binary codes used to …
For Number Systems, candidates should be able to: convert positive denary whole numbers (0-255) into 8-bit binary numbers and vice versa add two 8-bit binary integers and explain overflow errors which may occur convert positive denary whole numbers (0-255) into 2-digit hexadecimal numbers and vice versa convert between binary and hexadecimal equivalents of the same …
Candidates should be able to: explain the advantages of networking stand-alone computers into a local area network describe the hardware needed to connect stand-alone computers into a local area network, including hub/switches, wireless access points explain the different roles of computers in a client-server and a peer-to-peer network describe, using diagrams or otherwise, the ring, …
Candidates should be able to: describe syntax errors and logic errors which may occur while developing a program understand and identify syntax and logic errors select and justify test data for a program, stating the expected outcome of each test. What are syntax errors? Syntax errors are errors that occur when instructions do not follow …
Introduction to LMC Addition and Subtraction The following program will demonstrate the ADD and SUB instructions of the LMC instruction set. Instructions Copy the ten line program above and paste it into the Program box. Click on the “Assemble Program” button. After the program is assembled you should see RAM addresses 0 to 8 contain …
The following program will demonstrate the INPUT and OUTPUT instructions of the LMC.Running the program: the program simply INPUTS a number, then OUTPUTS it. Instructions Copy the three-line program above and paste it into the Program box. Click on the “Assemble Program” button. After the program is assembled you should see RAM addresses 0 to …
The following program will demonstrate the use of LDA and STA, the Load and Save instructions used in the LMC.Running the program: when prompted, INPUT a set of two numbers. The program should then OUTPUT them in the same order that they were entered. INPSTA firstINPSTA secondLDA firstOUTLDA secondOUTHLTfirst DATsecond DAT 0 INP1 STA 92 …
Candidates should be able to: define the terms variable and constant as used in an imperative language use variables and constants describe the data types integer, real, Boolean, character and string select and justify appropriate data types for a given program perform common operations on numeric and Boolean data use one-dimensional arrays. What are constants …
A Little Man Computer (LMC) is a simulator which has many of the basic features of a modern computer that uses the Von Neumann architecture.
