Daily Practice · GCSE Computer Science
June 2010 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in June 2010, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in June 2010
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 2010Name the translator used for assembly language and describe how it differs from a compiler.
- 2nd June 2010Convert the hexadecimal number 1A to denary.
- 3rd June 2010Convert the denary number 156 to an 8 bit binary number.
- 4th June 2010Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 5th June 2010Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 6th June 2010An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 7th June 2010A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 8th June 2010Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 9th June 2010Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 10th June 2010State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 11th June 2010A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
- 12th June 2010Define the term protocol.
- 13th June 2010Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 14th June 2010Define the term 'primary key' as used in a database table.
- 15th June 2010Define the term 'interrupt' as used to describe a signal received by a CPU.
- 16th June 2010An 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.
- 17th June 2010Evaluate X = NOT A AND B when A = 0 and B = 1.
- 18th June 2010Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 19th June 2010Give one advantage of a star topology compared with a mesh topology.
- 20th June 2010Explain the purpose of a breakpoint.
- 21st June 2010Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 22nd June 2010State the three stages of the fetch-decode-execute cycle in the order they occur.
- 23rd June 2010State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 24th June 2010Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 25th June 2010Define the term 'pixel'.
- 26th June 2010Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 27th June 2010Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 28th June 2010Evaluate the expression 23 DIV 4.
- 29th June 2010A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
- 30th June 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.