Exam (elaborations)
IGCSE COMPUTER SCIENCE - 1.1 DATA REPRESENTATION EXAM QUESTIONS AND ANSWERS
- Module
- Institution
IGCSE COMPUTER SCIENCE - 1.1 DATA REPRESENTATION EXAM QUESTIONS AND ANSWERS
[Show more]
Seller
Follow
biggdreamer
Reviews received
Content preview
IGCSE COMPUTER SCIENCE - 1.1 DATAREPRESENTATION EXAM QUESTIONS
AND ANSWERS
Machine code
1st Generation language - Answer-The 1s and 0s that make up the instructions for a
computer. This is the lowest level of programming language that all programs must be
converted to in order to be executed on a computer. Computers only understand
machine code.
Assembly language
2nd generation language - Answer-One step up from machine code where the individual
machine code instructions are represented as simple keywords such as ADD or BRA.
Requires an assembler to turn it into machine code.
High level language
3rd generation language. - Answer-A computer programming language that is much
closer to a human language than machine code. Examples of high level languages are
Python, PHP, Visual Basic and C (although there are lots more!). Requires and
interpreter or a compiler to turn it into machine code.
Bit - Answer-A single binary digit. A bit will be either a 1 or a 0.
Nibble - Answer-4 bits is equivalent to a single hexadecimal digit.
e.g. 0111 = 7, 1010 = A, 1111 = F
Byte - Answer-8 bits. Can be used to represent any denary number from 0 to 255 (that's
256 different combinations!).
Kilobyte - Answer-1024 or 2^10 bytes.
Megabyte (Mb) - Answer-1024 kilobytes.
Gigabyte (Gb) - Answer-1024 megabytes.
Terabyte (Tb) - Answer-1024 gigabytes.
Binary - Answer-The number system we use to represent the data stored in a digital
computer. Binary is a base 2 number system and uses the digits 1 and 0.
Hexadecimal - Answer-A base 16 number system that we use to represent the data
stored in a digital computer. Hexadecimal is used instead of binary for two reasons: 1. It
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 credit card 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 these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller biggdreamer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £8.60. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now