Daily Practice · GCSE Computer Science
October 2016 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in October 2016, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in October 2016
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2016An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
- 2nd October 2016Complete: NOT 0 = ?
- 3rd October 2016Convert the 8-bit binary number 01011010 to denary.
- 4th October 2016State what LAN stands for.
- 5th October 2016State why a program written in a high level language must be translated.
- 6th October 2016An 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.
- 7th October 2016Which CPU register holds the address of the next instruction to be fetched?
- 8th October 2016Distinguish between the network security threats known as phishing and pharming.
- 9th October 2016Describe what a nested loop does when it processes a 2D array.
- 10th October 2016A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 11th October 2016A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 12th October 2016A 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.
- 13th October 2016State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 14th October 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.
- 15th October 2016Give one example of an optical secondary storage device.
- 16th October 2016Give two reasons why network communication is divided into layers.
- 17th October 2016State the term used for realistic data that a program would be expected to handle during normal use.
- 18th October 2016State what a foreign key is used for.
- 19th October 2016State the difference between lossy and lossless compression.
- 20th October 2016State the condition that must be met before a binary search can be used on an array.
- 21st October 2016A 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.
- 22nd October 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.
- 23rd October 2016Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 24th October 2016Explain why an interpreter is often preferred while a program is being written.
- 25th October 2016Convert the denary number 45 to hexadecimal.
- 26th October 2016What does the acronym CPU stand for?
- 27th October 2016State what the term malware means.
- 28th October 2016A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 29th October 2016An 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).
- 30th October 2016Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 31st October 2016Which piece of UK legislation controls how organisations must store and use people's personal data?