Daily Practice · GCSE Computer Science
April 1998 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 1998, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1998Convert the denary number 156 to an 8 bit binary number.
- 2nd April 1998Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 3rd April 1998A 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.
- 4th April 1998An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 5th April 1998A 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.
- 6th April 1998Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 7th April 1998Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 8th April 1998Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 9th April 1998A 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.
- 10th April 1998State the layer that IP operates in, and describe its job.
- 11th April 1998Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 12th April 1998A 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.
- 13th April 1998Define the term 'interrupt' as used to describe a signal received by a CPU.
- 14th April 1998An 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.
- 15th April 1998Evaluate X = NOT A AND B when A = 0 and B = 1.
- 16th April 1998Convert the hexadecimal number FF to an 8-bit binary number.
- 17th April 1998Give one advantage of a star topology compared with a mesh topology.
- 18th April 1998Describe what syntax highlighting is and how it helps a programmer.
- 19th April 1998Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 20th April 1998State the three stages of the fetch-decode-execute cycle in the order they occur.
- 21st April 1998State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 22nd April 1998Trace 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).
- 23rd April 1998Define the term 'pixel'.
- 24th April 1998Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 25th April 1998Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 26th April 1998Evaluate the expression 23 DIV 4.
- 27th April 1998State the correct order of the three operations used to read data from a text file.
- 28th April 1998A 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.
- 29th April 1998Explain the role of TCP when a large file is downloaded.
- 30th April 1998A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?