Daily Practice · GCSE Computer Science
May 2008 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2008, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2008State what LAN stands for.
- 2nd May 2008A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 3rd May 2008An 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 May 2008Which CPU register holds the address of the next instruction to be fetched?
- 5th May 2008Distinguish between the network security threats known as phishing and pharming.
- 6th May 2008An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 7th May 2008A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 8th May 2008A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 9th May 2008A 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 May 2008State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 11th May 2008State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 12th May 2008Give one example of an optical secondary storage device.
- 13th May 2008State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 14th May 2008State the term used for realistic data that a program would be expected to handle during normal use.
- 15th May 2008Define the term 'primary key' as used in a database table.
- 16th May 2008State the difference between lossy and lossless compression.
- 17th May 2008State the condition that must be met before a binary search can be used on an array.
- 18th May 2008A 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 May 2008Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 20th May 2008Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 21st May 2008State why a program written in a high level language must be translated.
- 22nd May 2008Convert the denary number 45 to hexadecimal.
- 23rd May 2008What does the acronym CPU stand for?
- 24th May 2008State what the term malware means.
- 25th May 2008Describe what a nested loop does when it processes a 2D array.
- 26th May 2008An 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 May 2008Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 28th May 2008Which piece of UK legislation controls how organisations must store and use people's personal data?
- 29th May 2008Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 30th May 2008A 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.
- 31st May 2008Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.