Daily Practice · GCSE Computer Science
August 2017 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in August 2017, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in August 2017
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2017Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 2nd August 2017State the two values a Boolean data type can hold.
- 3rd August 2017Convert the 8-bit binary number 01011010 to denary.
- 4th August 2017Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 5th August 2017Describe what syntax highlighting is and how it helps a programmer.
- 6th August 2017Convert the hexadecimal number 1A to denary.
- 7th August 2017Convert the denary number 156 to an 8 bit binary number.
- 8th August 2017Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 9th August 2017Trace 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).
- 10th August 2017An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 11th August 2017A 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.
- 12th August 2017Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 13th August 2017Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 14th August 2017Write 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.
- 15th August 2017A 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.
- 16th August 2017Explain the role of TCP when a large file is downloaded.
- 17th August 2017Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 18th August 2017State what a foreign key is used for.
- 19th August 2017Define the term 'interrupt' as used to describe a signal received by a CPU.
- 20th August 2017An 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.
- 21st August 2017Evaluate X = NOT A AND B when A = 0 and B = 1.
- 22nd August 2017A 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.
- 23rd August 2017Give one advantage of a star topology compared with a mesh topology.
- 24th August 2017Give one advantage and one disadvantage of using a compiler.
- 25th August 2017Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 26th August 2017State the three stages of the fetch-decode-execute cycle in the order they occur.
- 27th August 2017State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 28th August 2017Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 29th August 2017Define the term 'pixel'.
- 30th August 2017Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 31st August 2017Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?