Daily Practice · GCSE Computer Science
November 2018 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in November 2018, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in November 2018
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 2018State the two values a Boolean data type can hold.
- 2nd November 2018Convert the 8-bit binary number 01011010 to denary.
- 3rd November 2018Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 4th November 2018Explain the purpose of a breakpoint.
- 5th November 2018Convert the hexadecimal number 1A to denary.
- 6th November 2018Convert the denary number 156 to an 8 bit binary number.
- 7th November 2018Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 8th November 2018Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 9th November 2018An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 10th November 2018A 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.
- 11th November 2018Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 12th November 2018Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 13th November 2018Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
- 14th November 2018A 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.
- 15th November 2018Name the four layers of the TCP/IP model in order from the one closest to the user.
- 16th November 2018Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 17th November 2018State what a foreign key is used for.
- 18th November 2018Define the term 'interrupt' as used to describe a signal received by a CPU.
- 19th November 2018An 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.
- 20th November 2018Evaluate X = NOT A AND B when A = 0 and B = 1.
- 21st November 2018A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 22nd November 2018Give one advantage of a star topology compared with a mesh topology.
- 23rd November 2018A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 24th November 2018Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 25th November 2018State the three stages of the fetch-decode-execute cycle in the order they occur.
- 26th November 2018State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 27th November 2018An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 28th November 2018Define the term 'pixel'.
- 29th November 2018Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 30th November 2018Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?