Daily Practice · GCSE Computer Science
November 2005 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in November 2005, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in November 2005
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 2005State what LAN stands for.
- 2nd November 2005State why a program written in a high level language must be translated.
- 3rd November 2005An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
- 4th November 2005Which CPU register holds the address of the next instruction to be fetched?
- 5th November 2005Distinguish between the network security threats known as phishing and pharming.
- 6th November 2005Describe what a nested loop does when it processes a 2D array.
- 7th November 2005A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 8th November 2005A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 9th November 2005A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
- 10th November 2005State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 11th November 2005State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 12th November 2005Give one example of an optical secondary storage device.
- 13th November 2005Give two reasons why network communication is divided into layers.
- 14th November 2005State the term used for realistic data that a program would be expected to handle during normal use.
- 15th November 2005Define the term 'primary key' as used in a database table.
- 16th November 2005State the difference between lossy and lossless compression.
- 17th November 2005State the condition that must be met before a binary search can be used on an array.
- 18th November 2005A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 19th November 2005Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 20th November 2005Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 21st November 2005Explain why an interpreter is often preferred while a program is being written.
- 22nd November 2005Convert the denary number 45 to hexadecimal.
- 23rd November 2005What does the acronym CPU stand for?
- 24th November 2005State what the term malware means.
- 25th November 2005A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 26th November 2005An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 27th November 2005Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 28th November 2005Which piece of UK legislation controls how organisations must store and use people's personal data?
- 29th November 2005Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 30th November 2005A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.