Daily Practice · GCSE Computer Science
March 2005 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in March 2005, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in March 2005
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2005Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 2nd March 2005State the three stages of the fetch-decode-execute cycle in the order they occur.
- 3rd March 2005State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 4th March 2005A 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.
- 5th March 2005Define the term 'pixel'.
- 6th March 2005Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 7th March 2005Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 8th March 2005Evaluate the expression 23 DIV 4.
- 9th March 2005State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 10th March 2005A 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.
- 11th March 2005State the layer that IP operates in, and describe its job.
- 12th March 2005A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 13th March 2005A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
- 14th March 2005A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 15th March 2005An 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.
- 16th March 2005Complete: NOT 0 = ?
- 17th March 2005State how many different values can be represented using 5 bits, and explain your reasoning.
- 18th March 2005State what LAN stands for.
- 19th March 2005Describe what syntax highlighting is and how it helps a programmer.
- 20th March 2005An 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.
- 21st March 2005Which CPU register holds the address of the next instruction to be fetched?
- 22nd March 2005Distinguish between the network security threats known as phishing and pharming.
- 23rd March 2005Trace 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).
- 24th March 2005A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 25th March 2005A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 26th March 2005A 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.
- 27th March 2005State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 28th March 2005State the key difference between a procedure and a function.
- 29th March 2005Give one example of an optical secondary storage device.
- 30th March 2005Explain the role of TCP when a large file is downloaded.
- 31st March 2005State the term used for realistic data that a program would be expected to handle during normal use.