Daily Practice · GCSE Computer Science
August 2018 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in August 2018, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in August 2018
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2018State why a program written in a high level language must be translated.
- 2nd August 2018Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 3rd August 2018State the three stages of the fetch-decode-execute cycle in the order they occur.
- 4th August 2018State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 5th August 2018Describe what a nested loop does when it processes a 2D array.
- 6th August 2018Define the term 'pixel'.
- 7th August 2018Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 8th August 2018Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 9th August 2018Evaluate the expression 23 DIV 4.
- 10th August 2018A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
- 11th August 2018A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
- 12th August 2018Give two reasons why network communication is divided into layers.
- 13th August 2018A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 14th August 2018A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 15th August 2018A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 16th August 2018An 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.
- 17th August 2018Complete: NOT 0 = ?
- 18th August 2018Convert the denary number 39 to an 8-bit binary number, showing your working.
- 19th August 2018State what LAN stands for.
- 20th August 2018Explain why an interpreter is often preferred while a program is being written.
- 21st August 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.
- 22nd August 2018Which CPU register holds the address of the next instruction to be fetched?
- 23rd August 2018Distinguish between the network security threats known as phishing and pharming.
- 24th August 2018A 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.
- 25th August 2018A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 26th August 2018A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 27th August 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.
- 28th August 2018State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 29th August 2018Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 30th August 2018Give one example of an optical secondary storage device.
- 31st August 2018State the layer that IP operates in, and describe its job.