Daily Practice · GCSE Computer Science
February 2002 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in February 2002, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in February 2002
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2002Convert the denary number 200 to hexadecimal, showing your working.
- 2nd February 2002State what LAN stands for.
- 3rd February 2002Explain the purpose of a breakpoint.
- 4th February 2002An 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.
- 5th February 2002Which CPU register holds the address of the next instruction to be fetched?
- 6th February 2002Distinguish between the network security threats known as phishing and pharming.
- 7th February 2002Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 8th February 2002A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 9th February 2002A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 10th February 2002A 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.
- 11th February 2002State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 12th February 2002State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 13th February 2002Give one example of an optical secondary storage device.
- 14th February 2002Name the four layers of the TCP/IP model in order from the one closest to the user.
- 15th February 2002State the term used for realistic data that a program would be expected to handle during normal use.
- 16th February 2002Define the term 'primary key' as used in a database table.
- 17th February 2002State the difference between lossy and lossless compression.
- 18th February 2002State the condition that must be met before a binary search can be used on an array.
- 19th February 2002A 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.
- 20th February 2002Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 21st February 2002Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 22nd February 2002A 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.
- 23rd February 2002Convert the denary number 45 to hexadecimal.
- 24th February 2002What does the acronym CPU stand for?
- 25th February 2002State what the term malware means.
- 26th February 2002An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 27th February 2002An 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).
- 28th February 2002Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?