Daily Practice · GCSE Computer Science
December 2009 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in December 2009, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in December 2009
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 2009State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 2nd December 2009Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 3rd December 2009Give one example of an optical secondary storage device.
- 4th December 2009State the layer that IP operates in, and describe its job.
- 5th December 2009State the term used for realistic data that a program would be expected to handle during normal use.
- 6th December 2009A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
- 7th December 2009State the difference between lossy and lossless compression.
- 8th December 2009State the condition that must be met before a binary search can be used on an array.
- 9th December 2009A 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.
- 10th December 2009Convert the hexadecimal number FF to an 8-bit binary number.
- 11th December 2009Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 12th December 2009Describe what syntax highlighting is and how it helps a programmer.
- 13th December 2009Convert the denary number 45 to hexadecimal.
- 14th December 2009What does the acronym CPU stand for?
- 15th December 2009State what the term malware means.
- 16th December 2009Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 17th December 2009An 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).
- 18th December 2009Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 19th December 2009Which piece of UK legislation controls how organisations must store and use people's personal data?
- 20th December 2009Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 21st December 2009State the correct order of the three operations used to read data from a text file.
- 22nd December 2009Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 23rd December 2009Explain the role of TCP when a large file is downloaded.
- 24th December 2009A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 25th December 2009A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 26th December 2009State one function carried out by the operating system of a computer.
- 27th December 2009In computational thinking, what is meant by the term 'decomposition'?
- 28th December 2009Given A = 1 and B = 1, state the value of A AND B.
- 29th December 2009Convert the denary number 200 to hexadecimal, showing your working.
- 30th December 2009Define a peer-to-peer network.
- 31st December 2009Give one advantage and one disadvantage of using a compiler.