Daily Practice · GCSE Computer Science
July 2020 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in July 2020, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in July 2020
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2020Complete: NOT 0 = ?
- 2nd July 2020Convert the 8-bit binary number 01011010 to denary.
- 3rd July 2020State what LAN stands for.
- 4th July 2020Describe what syntax highlighting is and how it helps a programmer.
- 5th July 2020An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
- 6th July 2020Which CPU register holds the address of the next instruction to be fetched?
- 7th July 2020Distinguish between the network security threats known as phishing and pharming.
- 8th July 2020Trace 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).
- 9th July 2020A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 10th July 2020A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 11th July 2020A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
- 12th July 2020State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 13th July 2020Write 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 July 2020Give one example of an optical secondary storage device.
- 15th July 2020Explain the role of TCP when a large file is downloaded.
- 16th July 2020State the term used for realistic data that a program would be expected to handle during normal use.
- 17th July 2020State what a foreign key is used for.
- 18th July 2020State the difference between lossy and lossless compression.
- 19th July 2020State the condition that must be met before a binary search can be used on an array.
- 20th July 2020A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 21st July 2020A 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 July 2020Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 23rd July 2020Give one advantage and one disadvantage of using a compiler.
- 24th July 2020Convert the denary number 45 to hexadecimal.
- 25th July 2020What does the acronym CPU stand for?
- 26th July 2020State what the term malware means.
- 27th July 2020Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 28th July 2020An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 29th July 2020Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 30th July 2020Which piece of UK legislation controls how organisations must store and use people's personal data?
- 31st July 2020Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.