1580060
| Pregunta | Respuesta |
| What are the variable types and what can they store | String: text Boolean: True or False Integer: whole numbers Real: numbers with fractional parts |
| Give an example of an assignment expression | score = 120 |
| Name two logical operators. Give an example of one. | AND OR Score = 50 and Pass = true |
| Name two design notations Give an example of them | Graphical and Textual Graphical = flowcharts Textual = Pseudocode |
| Give two examples of what makes your code more readable | Internal Commentary - explaining your code White Space - section out code |
| What are the 3 testing types with a definiton | Normal: in range Extreme: edge of range Exceptional: out of range |
| Name the 3 error types | Syntax, Logic and Execution |
| What is a Logic Error | Using AND/OR incorrectly |
| How do you convert from bits to Bytes | Divide by 8 |
| How do you convert from Bytes to bits | Multiply by 8 |
| How do you convert to a larger storage unit | Divide by 1024 |
| How do you convert to a smaller storage unit | Multiply by 1024 |
| How do you find the binary capacity | x bit system- 2 to the power of whatever bit size |
| Give 2 advantages and a disadvantage of using vector graphics | Advantages - each object can be moved independently. - background isn't stored, file size is lower Disadvantage - can't do special effects |
| What is bitmap | binary colour code in pixels |
| number of pixels * bits per pixel = ? | size of file |
| Name 2 storage devices | Built in Memory stick |
| Name 3 legal acts | Data Protection Computer misuse Copyright, Designs and Patents |
| What does URL mean | Uniform Resource Locator |
| Name the 2 buses and state their use | Data - transfers program data Address - transfer memory address details |
| What are the 3 parts of a processor | Arithmetic and Logic Unit(ALU) Control Unit Registers |
| Name the 2 memory types and what they stand for | RAM - Random Access Memory ROM - Read Only Memory |
| What is Translation | When high level programs need to be translated into machine code for computer to run |
| What is the purpose of Javascript | Security on pages Altering document content Adding a hit counter |
| Name the 4 parts to a URL | - protocol - domainName/ host/ serverID / - the folder name - the file type |
| Identify the protocol, file type and domain name: http://www.thooons.co.uk/partymusic/party.html | protocol - http:// domain name - www.thooons.co.uk file type - party.html |
| What is a Denial of service attack | Where a machine or network resource is made unavailable to its intended users. |
| Where are binary instructions stored before being executed | RAM |
| State 3 things which make a user interface more suitable | Easy navigation Good readability Visual Layout Target Audience |
| State 3 standard file formats for graphics and what they do | GIF - compresses files with no loss in quality JPEG - removes parts of image it feels are unnecessary - good for photographs PNG - uses mathematical formula to reduce file size |
| Difference between internal and external hyperlinks | Internal is to pages in the same domain and external is to pages outside the domain |
| What is a pre-defined function | something that is built into the program so that you only have to use the variable name and not code from scratch every time |
| What is a Syntax Error | misspelling variables or poor spelling These will STOP the program from working |
| What is an Execution error | dividing by zero, infinite loop, storing letters as an Integer These will cause program to crash |
| How would you store binary as a real number | mantissa x (base to the power of exponent) |
| What is the difference between RAM and ROM | RAM is used to store running programs ROM stores programs required to boot the computer up. |
| Name the 2 sound standard file formats and state the difference | WAV - good quality, large file size MP3 - smaller file size, still good quality |
| Name 2 output devices | Screen/Monitor Printer Speakers |
| Name 4 Input Devices | Keyboard Scanner Mouse Trackerball Trackpad |
| What does HTML stand for | HyperText Markup Language |
| Name a built - in storage and an external storage | Built - in - hard disc External - memory stick |
| Name 3 security risks | Denial of Service Attack keylogging Hackers Viruses |
| Name 3 security precautions | Passwords Firewall Anti-virus software |
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