Fetch Execute Cycle
I was asked for more detail about the fetch execute cycle. So I thought I would look for something new and a simpler way to explain it. So if you have a look at this BBC page, you should get a basic overview of what is happening. You can then read what I found on this page, this will help you to understand it a little better.
Then you can read my blog post about it, which also includes a link to an animation.
Scholar Online Homework Session
Theme: | Arrays |
---|---|
Subjects: | Higher Computing |
Audience: | Student |
When: | Wednesday, 29 October 2014 7:30 PM |
Presented by: | Ian King, SCHOLAR Online Tutor for Computing and Information Systems |
Session link: | http://heriot-watt.adobeconnect.com/scholarhomework (Enter as a Guest) |
You can check on other sessions here.
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Test Post
IE test post.
So is this
Good Luck
Good luck in the exam tomorrow. Spend your last day of studying productively, don’t forget to get an early night.
Parameters and data flow
This is always a hot topic at this time of year. It’s been a while since we did procedures, parameters, byVal, Byref & Data Flow
From Shawlands Acc
- Data flow within a program is handled by parameters
- A parameter is a value or a variable which is passed into or out from a subroutine
- The parameters used in a procedure call are ACTUAL parameters
- The parameters used in a procedure definition are called FORMAL parameters
- A parameter is passed BY REFERENCE if it is to by passed into and back out of a procedure
- A parameter is passed BY VALUE if it is to by passed into but NOT back out of a procedure
- Arrays are ALWAYS passed by reference
- The use of parameters means that variables can be kept local to subroutines
- This leads to programs being more reliable and robust
Targeted Past Papers
Download
Ways to use them
- Do the topic questions in order or random. Use e-copies to check answers.
- Use Acrobat reader to search the past papers or marking instructions for course content, then do those questions. i.e. “Binary” brings up 4 questions, “CLUT” brings up 5 hits.
- Use both the past papers and marking instructions to both test your knowledge (past papers) and revise parts of the course (Marking Instructions).
A week to go!
I hope your revision and exams are going well. Seven more sleeps till your Computing exam, I know a few of you will have other exams between now and then but this post is only focused on Computing. I’m not here today to get you wound up or to cause you any more stress, but this post, is to focus your attention on what you should be doing between now and then.
Here is what I would do with a week to go.
- I wouldn’t study outside – its hot and full of distractions
- I would start at 9 and do the following
- Past Paper
- Break
- Marking Past Paper
- Break down wrong answers into core and non core (using the list below – core is likely to come up the exam)
- Revise core
- Lunch
- Revise core
- Break (its about 2pm if the above tasks took you 2hr for the paper and 30 mins a task)
- Revise non core answers
- Look over the topics from the units by picking a half dozen topics each day.
- Download this document. and use this as the basis for some questions on the topics I found hard, as well as, using it to aid revision of the topics in the units (List of Topics at bottom)
- Use the blog, Scholar and other school’s notes to learn the core information I am not sure about.
- I would learn the two images below and be able to describe and compare each of the aditdem elements with each other – E.g. what is the difference between Procedural and Event Driven Languages?
- I would make sure that I can describe two differences of the attached.
- I would look over and memorise the standard algorithms
- I would buy a £1 calculator that does binary and learn how to use it.
- If I was tired, I would take a break and I would cut down on caffeine.
- I would give my mobile/tablet/games console to my parents when I was studying and get it back at breaks (when I was your age this was not an option )
The above is not a roadmap to success! However, it might help get you the marks you need to change a grade.
Good luck in the exam! Remember ask questions here or to my email account, I will be checking them over the coming week and will try and get a response out ASAP. If you are finding it too warm to study, the class room has air con and I’m sure I could squeeze you in at a desk.
Core – likely to come up in the exam
Computer Systems
- Systems
- application based tests
- Bit map graphics
- CCD
- fetch execute cycle
- file, print and web servers
- FLOPS
- hub, switch, router
- Interface functions
- MIPS
- Network topologies
- operating system functions
- peer to peer Vs client server
- RGB
- software compatibility issues
- standard file formats
- Two’s complement
- utility programs
- Vector graphics
- virus software detection techniques
- Viruses – types, code actions
Software Development
- by value and by reference
- local and global variables
- concatenation and substrings
- design notations
- Evaluation – robustness, reliability, portability, efficiency and maintainability
- iterative
- macros
- maintenance
- module library
- one-dimensional arrays
- personnel
- procedural, declarative and event-driven
- real, integer and boolean variables
- Scope
- scripting languages
- software specification
- stages
- standard algorithms
Multimedia
- Authoring software
- Bluetooth
- CLUT
- codec and container file
- dithering
- MIDI
- MPEG
- PCM, ADPCM
- RAW, RIFF
- RLE, LZW
- Sound file size
- vector graphics
- Video file size
- anti-aliasing
- re-sampling
Unit / Topic
Computer Systems | |
Data representation | |
Computer structure | |
Peripherals | |
Networking | |
Computer software | |
Software Development | |
Software development process | |
Software development languages and environments | |
High level programming language constructs | |
Standard algorithms | |
Multimedia Technology | |
Development process for multimedia applications | |
Bit-mapped graphic data | |
Digitised sound data | |
Video data | |
Vector graphics data | |
Synthesised sound data | |
Implications of the use of multimedia technology |
Comments
I’m afraid there appears to be a problem with Akismet getting updates on Glow just now. As a result I have 600+ comments and no way of sorting out the rubbish from the requests. Can you drop me an email to my Glow account if you want a question answered.
VRML Textures
I thought this showed what effect the texture attribute can have on a sphere quite well.