Daily Practice · GCSE Computer Science
August 2008 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in August 2008, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in August 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2008An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 2nd August 2008Evaluate X = NOT A AND B when A = 0 and B = 1.
- 3rd August 2008Convert the hexadecimal number 3F to denary.
- 4th August 2008Give one advantage of a star topology compared with a mesh topology.
- 5th August 2008Name the translator used for assembly language and describe how it differs from a compiler.
- 6th August 2008Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 7th August 2008State the three stages of the fetch-decode-execute cycle in the order they occur.
- 8th August 2008State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 9th August 2008Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 10th August 2008Define the term 'pixel'.
- 11th August 2008Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 12th August 2008Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 13th August 2008Evaluate the expression 23 DIV 4.
- 14th August 2008A 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.
- 15th August 2008A 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.
- 16th August 2008Define the term protocol.
- 17th August 2008A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 18th August 2008A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 19th August 2008A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 20th August 2008An 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.
- 21st August 2008Complete: NOT 0 = ?
- 22nd August 2008Convert the denary number 39 to an 8-bit binary number, showing your working.
- 23rd August 2008State what LAN stands for.
- 24th August 2008Explain the purpose of a breakpoint.
- 25th August 2008An 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.
- 26th August 2008Which CPU register holds the address of the next instruction to be fetched?
- 27th August 2008Distinguish between the network security threats known as phishing and pharming.
- 28th August 2008Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 29th August 2008A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 30th August 2008A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 31st August 2008A 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.