Daily Practice · GCSE Computer Science
February 2007 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in February 2007, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in February 2007
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2007Give one advantage and one disadvantage of using a compiler.
- 2nd February 2007An 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.
- 3rd February 2007Which CPU register holds the address of the next instruction to be fetched?
- 4th February 2007Distinguish between the network security threats known as phishing and pharming.
- 5th February 2007Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 6th February 2007A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 7th February 2007A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 8th February 2007A 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.
- 9th February 2007State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 10th February 2007State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 11th February 2007Give one example of an optical secondary storage device.
- 12th February 2007A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
- 13th February 2007State the term used for realistic data that a program would be expected to handle during normal use.
- 14th February 2007Define the term 'primary key' as used in a database table.
- 15th February 2007State the difference between lossy and lossless compression.
- 16th February 2007State the condition that must be met before a binary search can be used on an array.
- 17th February 2007A 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.
- 18th February 2007Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 19th February 2007Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 20th February 2007Name the translator used for assembly language and describe how it differs from a compiler.
- 21st February 2007Convert the denary number 45 to hexadecimal.
- 22nd February 2007What does the acronym CPU stand for?
- 23rd February 2007State what the term malware means.
- 24th February 2007Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 25th February 2007An 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).
- 26th February 2007Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 27th February 2007Which piece of UK legislation controls how organisations must store and use people's personal data?
- 28th February 2007Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.