Daily Practice · GCSE Computer Science
May 2017 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2017, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2017
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2017Give one advantage of a star topology compared with a mesh topology.
- 2nd May 2017Name the translator used for assembly language and describe how it differs from a compiler.
- 3rd May 2017Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 4th May 2017State the three stages of the fetch-decode-execute cycle in the order they occur.
- 5th May 2017State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 6th May 2017Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 7th May 2017Define the term 'pixel'.
- 8th May 2017Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 9th May 2017Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 10th May 2017Evaluate the expression 23 DIV 4.
- 11th May 2017A 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.
- 12th May 2017A 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.
- 13th May 2017Define the term protocol.
- 14th May 2017A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 15th May 2017A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 16th May 2017A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 17th May 2017An 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.
- 18th May 2017Complete: NOT 0 = ?
- 19th May 2017Convert the denary number 39 to an 8-bit binary number, showing your working.
- 20th May 2017State what LAN stands for.
- 21st May 2017Explain the purpose of a breakpoint.
- 22nd May 2017An 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.
- 23rd May 2017Which CPU register holds the address of the next instruction to be fetched?
- 24th May 2017Distinguish between the network security threats known as phishing and pharming.
- 25th May 2017Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 26th May 2017A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 27th May 2017A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 28th May 2017A 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.
- 29th May 2017State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 30th May 2017Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 31st May 2017Give one example of an optical secondary storage device.