Daily Practice · GCSE Computer Science
May 2007 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2007, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2007
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2007Give one advantage of a relational database over a flat-file database.
- 2nd May 2007Define the term 'interrupt' as used to describe a signal received by a CPU.
- 3rd May 2007An 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.
- 4th May 2007Evaluate X = NOT A AND B when A = 0 and B = 1.
- 5th May 2007Convert the hexadecimal number 3F to denary.
- 6th May 2007Give one advantage of a star topology compared with a mesh topology.
- 7th May 2007Explain why an interpreter is often preferred while a program is being written.
- 8th May 2007Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 9th May 2007State the three stages of the fetch-decode-execute cycle in the order they occur.
- 10th May 2007State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 11th May 2007A 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.
- 12th May 2007Define the term 'pixel'.
- 13th May 2007Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 14th May 2007Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 15th May 2007Evaluate the expression 23 DIV 4.
- 16th May 2007A 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.
- 17th May 2007A 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.
- 18th May 2007State the layer that IP operates in, and describe its job.
- 19th May 2007A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 20th May 2007A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 21st May 2007A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 22nd May 2007An 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.
- 23rd May 2007Complete: NOT 0 = ?
- 24th May 2007Convert the denary number 39 to an 8-bit binary number, showing your working.
- 25th May 2007State what LAN stands for.
- 26th May 2007Describe what syntax highlighting is and how it helps a programmer.
- 27th May 2007An 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.
- 28th May 2007Which CPU register holds the address of the next instruction to be fetched?
- 29th May 2007Distinguish between the network security threats known as phishing and pharming.
- 30th May 2007Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 31st May 2007A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.