Daily Practice · GCSE Computer Science
January 2018 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 2018, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 2018
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2018Complete: NOT 0 = ?
- 2nd January 2018Convert the 8-bit binary number 01011010 to denary.
- 3rd January 2018State what LAN stands for.
- 4th January 2018Give one advantage and one disadvantage of using a compiler.
- 5th January 2018An 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 January 2018Which CPU register holds the address of the next instruction to be fetched?
- 7th January 2018Distinguish between the network security threats known as phishing and pharming.
- 8th January 2018Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 9th January 2018A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 10th January 2018A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 11th January 2018A 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 January 2018State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 13th January 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 January 2018Give one example of an optical secondary storage device.
- 15th January 2018A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
- 16th January 2018State the term used for realistic data that a program would be expected to handle during normal use.
- 17th January 2018State what a foreign key is used for.
- 18th January 2018State the difference between lossy and lossless compression.
- 19th January 2018State the condition that must be met before a binary search can be used on an array.
- 20th January 2018A 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 January 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 January 2018Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 23rd January 2018Name the translator used for assembly language and describe how it differs from a compiler.
- 24th January 2018Convert the denary number 45 to hexadecimal.
- 25th January 2018What does the acronym CPU stand for?
- 26th January 2018State what the term malware means.
- 27th January 2018Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 28th January 2018An 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 January 2018Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 30th January 2018Which piece of UK legislation controls how organisations must store and use people's personal data?
- 31st January 2018Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.