Daily Practice · GCSE Computer Science
March 2010 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in March 2010, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in March 2010
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2010State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 2nd March 2010An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 3rd March 2010Define the term 'pixel'.
- 4th March 2010Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 5th March 2010Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 6th March 2010Evaluate the expression 23 DIV 4.
- 7th March 2010State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 8th March 2010A 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.
- 9th March 2010State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 10th March 2010A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 11th March 2010A 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.
- 12th March 2010A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 13th March 2010An 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.
- 14th March 2010Complete: NOT 0 = ?
- 15th March 2010State how many different values can be represented using 5 bits, and explain your reasoning.
- 16th March 2010State what LAN stands for.
- 17th March 2010State why a program written in a high level language must be translated.
- 18th March 2010An 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.
- 19th March 2010Which CPU register holds the address of the next instruction to be fetched?
- 20th March 2010Distinguish between the network security threats known as phishing and pharming.
- 21st March 2010Describe what a nested loop does when it processes a 2D array.
- 22nd March 2010A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 23rd March 2010A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 24th March 2010A 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.
- 25th March 2010State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 26th March 2010State the key difference between a procedure and a function.
- 27th March 2010Give one example of an optical secondary storage device.
- 28th March 2010Give two reasons why network communication is divided into layers.
- 29th March 2010State the term used for realistic data that a program would be expected to handle during normal use.
- 30th March 2010Give one advantage of a relational database over a flat-file database.
- 31st March 2010State the difference between lossy and lossless compression.