Daily Practice · GCSE Computer Science
May 2012 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2012, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2012Evaluate X = NOT A AND B when A = 0 and B = 1.
- 2nd May 2012Convert the hexadecimal number 3F to denary.
- 3rd May 2012Give one advantage of a star topology compared with a mesh topology.
- 4th May 2012A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 5th May 2012Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 6th May 2012State the three stages of the fetch-decode-execute cycle in the order they occur.
- 7th May 2012State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 8th May 2012An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 9th May 2012Define the term 'pixel'.
- 10th May 2012Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 11th May 2012Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 12th May 2012Evaluate the expression 23 DIV 4.
- 13th May 2012A 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.
- 14th May 2012A 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.
- 15th May 2012State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 16th May 2012A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 17th May 2012A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 18th May 2012A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 19th May 2012An 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.
- 20th May 2012Complete: NOT 0 = ?
- 21st May 2012Convert the denary number 39 to an 8-bit binary number, showing your working.
- 22nd May 2012State what LAN stands for.
- 23rd May 2012State why a program written in a high level language must be translated.
- 24th May 2012An 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.
- 25th May 2012Which CPU register holds the address of the next instruction to be fetched?
- 26th May 2012Distinguish between the network security threats known as phishing and pharming.
- 27th May 2012Describe what a nested loop does when it processes a 2D array.
- 28th May 2012A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 29th May 2012A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 30th May 2012A 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.
- 31st May 2012State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.