Daily Practice · GCSE Computer Science
September 2003 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in September 2003, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in September 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 2003A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 2nd September 2003A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 3rd September 2003A 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.
- 4th September 2003State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 5th September 2003Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 6th September 2003Give one example of an optical secondary storage device.
- 7th September 2003Give two reasons why network communication is divided into layers.
- 8th September 2003State the term used for realistic data that a program would be expected to handle during normal use.
- 9th September 2003A 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.
- 10th September 2003State the difference between lossy and lossless compression.
- 11th September 2003State the condition that must be met before a binary search can be used on an array.
- 12th September 2003A 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.
- 13th September 2003Convert the hexadecimal number FF to an 8-bit binary number.
- 14th September 2003Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 15th September 2003Explain why an interpreter is often preferred while a program is being written.
- 16th September 2003Convert the denary number 45 to hexadecimal.
- 17th September 2003What does the acronym CPU stand for?
- 18th September 2003State what the term malware means.
- 19th September 2003A 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.
- 20th September 2003An 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).
- 21st September 2003Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 22nd September 2003Which piece of UK legislation controls how organisations must store and use people's personal data?
- 23rd September 2003Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 24th September 2003State the correct order of the three operations used to read data from a text file.
- 25th September 2003Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 26th September 2003State the layer that IP operates in, and describe its job.
- 27th September 2003A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 28th September 2003A 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.
- 29th September 2003State one function carried out by the operating system of a computer.
- 30th September 2003In computational thinking, what is meant by the term 'decomposition'?