Daily Practice · GCSE Computer Science
April 2003 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2003, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2003An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 2nd April 2003An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 3rd April 2003A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 4th April 2003Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 5th April 2003Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 6th April 2003Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 7th April 2003A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
- 8th April 2003State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 9th April 2003Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 10th April 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.
- 11th April 2003Define the term 'interrupt' as used to describe a signal received by a CPU.
- 12th April 2003An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 13th April 2003Evaluate X = NOT A AND B when A = 0 and B = 1.
- 14th April 2003Convert the hexadecimal number FF to an 8-bit binary number.
- 15th April 2003Give one advantage of a star topology compared with a mesh topology.
- 16th April 2003State why a program written in a high level language must be translated.
- 17th April 2003Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 18th April 2003State the three stages of the fetch-decode-execute cycle in the order they occur.
- 19th April 2003State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 20th April 2003Describe what a nested loop does when it processes a 2D array.
- 21st April 2003Define the term 'pixel'.
- 22nd April 2003Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 23rd April 2003Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 24th April 2003Evaluate the expression 23 DIV 4.
- 25th April 2003State the correct order of the three operations used to read data from a text file.
- 26th April 2003A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
- 27th April 2003Give two reasons why network communication is divided into layers.
- 28th April 2003A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 29th April 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.
- 30th April 2003A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).