Category Archives: Homework

2. Software Development, Computing Higher, Homework

SCHOLAR Live Homework session – Higher Computing!

Presented by: Ian King, SCHOLAR Online Tutor for Computing.
When:              Wednesday 27 February  7.30 – 8.30pm.
Theme:            Using arrays to store data, and how they are accessed in the standard algorithms
Adobe Link (sign in as a guest):   http://heriot-watt.adobeconnect.com/scholarhomework
There will be an opportunity for students to participate in a Q&A session at the end of the presentation.
1. Computer Systems, 2. Software Development, Computing Higher, Homework, Revision

Week 2

2 Comments
Week Beginning Computer Systems Software Development
1 – 3/12/12 Data Representation The Need for the Software Development Process
2 – 10/12/12 Computer Structure Features of Software Development Process
3 – 17/12/12 Computer Performance Tools and techniques
4 – 24/12/12 Peripherals Personnel
5 – 31/12/12 Networking Languages and Environments
6 – 7/1/13 Using Networks High Level Language Constructs 1
7 – 14/1/13 Computer Software High Level Language Constructs 2
8 – 21/1/13 Dealing with Viruses Procedures, Functions and Standard Algorithms
9 – 28/1/13 End of Unit Test End of Unit Test
1. Computer Systems, 2. Software Development, Computing Higher, Homework, Revision

Week 1

Week Beginning Computer Systems Software Development
1 – 3/12/12 Data Representation The Need for the Software Development Process
2 – 10/12/12 Computer Structure Features of Software Development Process
3 – 17/12/12 Computer Performance Tools and techniques
4 – 24/12/12 Peripherals Personnel
5 – 31/12/12 Networking Languages and Environments
6 – 7/1/13 Using Networks High Level Language Constructs 1
7 – 14/1/13 Computer Software High Level Language Constructs 2
8 – 21/1/13 Dealing with Viruses Procedures, Functions and Standard Algorithms
9 – 28/1/13 End of Unit Test End of Unit Test
1. Computer Systems, Computing Higher, Homework

Homework for 13th Nov.

SQA 2007 Q17

17. John uses his digital camera to take photographs. It has a 512 Megabyte
memory card. His camera uses 16,777,216 colours and is set to a resolution of
3000 × 2000 pixels.
(a) (i) Calculate the file size of a single image. Your answer should be in
appropriate units. Show all working.
(ii) What is the maximum number of images of this size that can be
stored on John’s memory card?
(b) State two reasons why digital images are stored as JPEGs.
(c) He changes the setting in his camera to reduce the bit-depth.
Describe one effect that this will have.
(d) He connects his camera to his computer. One function of the interface is
the handling of status signals. Describe what is meant by the term “status
signals”.
(e) There are a large number of pictures on his hard disk. The combined size
of all of his photographs is 3 Gb.
He can use a solid-state storage device or Rewritable DVD to take all of his
photographs to his chemist shop for printing. Recommend one of these
devices and justify your choice.