Exam (elaborations)
INF1520 Assignment 3 2024 - DUE 15 July 2024
- Institution
- University Of South Africa (Unisa)
QUESTIONS AND ANSWERS INF1520 Assignment 3 2024 - DUE 15 July 2024
[Show more]
Content preview
[Company name]INF1520
Assignment 3 2024
- DUE 15 July 2024
QUESTIONS WITH DETAILED ANSWERS
, INF1520 Assignment 3 2024 - DUE 15 July 2024
Question 1 [13]
1.1 Explain why the keys on a computer keyboard are arranged in the order of QWERTY. (4)
1.2 There are, potentially, many mistakes that designers can make when designing interfaces.
Specify what are the most problematic mistakes designers make. (3)
1.3 Name and explain three common design mistakes users make when designing interfaces?
(6)
1.1 Why the keys on a computer keyboard are arranged in the order of QWERTY
The QWERTY keyboard layout was designed in the 1870s by Christopher Latham Sholes, who
invented the typewriter. The reasons for this specific arrangement include:
1. Typewriter Jamming: Early typewriters would jam if adjacent keys were pressed in quick
succession. The QWERTY layout was developed to reduce the likelihood of jamming by
spacing out commonly used letter pairs.
2. Typing Efficiency: The layout places frequently used letters in positions that can be easily
reached to improve typing speed and efficiency, considering the mechanics of early
typewriters.
3. Adoption and Standardization: Once the layout was adopted and typewriters became widely
used, it became a standard. Changing the layout would have required significant retraining and
redesign of typewriters, so it remained as the default.
4. Economic and Practical Factors: As QWERTY keyboards became standard, manufacturers
continued to produce them, reinforcing their use despite the existence of potentially more
efficient layouts like Dvorak.
1.2 Common Mistakes Designers Make When Designing Interfaces
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mulah11. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R50,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53068 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now