Daily Practice · GCSE Computer Science
May 2016 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2016, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2016
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2016Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
- 2nd May 2016Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 3rd May 2016State the two values a Boolean data type can hold.
- 4th May 2016Convert the 8-bit binary number 01011010 to denary.
- 5th May 2016Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 6th May 2016A 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.
- 7th May 2016Convert the hexadecimal number 1A to denary.
- 8th May 2016Convert the denary number 156 to an 8 bit binary number.
- 9th May 2016Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 10th May 2016An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 11th May 2016An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 12th May 2016A 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.
- 13th May 2016Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 14th May 2016Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 15th May 2016Write 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.
- 16th May 2016A 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.
- 17th May 2016State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 18th May 2016Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 19th May 2016State what a foreign key is used for.
- 20th May 2016Define the term 'interrupt' as used to describe a signal received by a CPU.
- 21st May 2016An 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.
- 22nd May 2016Evaluate X = NOT A AND B when A = 0 and B = 1.
- 23rd May 2016A 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.
- 24th May 2016Give one advantage of a star topology compared with a mesh topology.
- 25th May 2016State why a program written in a high level language must be translated.
- 26th May 2016Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 27th May 2016State the three stages of the fetch-decode-execute cycle in the order they occur.
- 28th May 2016State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 29th May 2016Describe what a nested loop does when it processes a 2D array.
- 30th May 2016Define the term 'pixel'.
- 31st May 2016Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.