Daily Practice · GCSE Computer Science
June 2008 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in June 2008, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in June 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 2008Give two reasons why network communication is divided into layers.
- 2nd June 2008A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 3rd June 2008A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
- 4th June 2008State one function carried out by the operating system of a computer.
- 5th June 2008In computational thinking, what is meant by the term 'decomposition'?
- 6th June 2008Given A = 1 and B = 1, state the value of A AND B.
- 7th June 2008Convert the 8-bit binary number 01011010 to denary.
- 8th June 2008Define a peer-to-peer network.
- 9th June 2008Explain why an interpreter is often preferred while a program is being written.
- 10th June 2008Convert the denary number 5 to a 4-bit binary number.
- 11th June 2008A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 12th June 2008A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
- 13th June 2008A 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.
- 14th June 2008A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 15th June 2008State the type of program that is typically stored in ROM.
- 16th June 2008State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 17th June 2008A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 18th June 2008Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
- 19th June 2008State the typical maximum capacity of a single-layer DVD.
- 20th June 2008State the layer that IP operates in, and describe its job.
- 21st June 2008State what is meant by a syntax error.
- 22nd June 2008State what a foreign key is used for.
- 23rd June 2008What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 24th June 2008Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 25th June 2008Given P = 0 and Q = 1, state the value of P OR Q.
- 26th June 2008A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 27th June 2008A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
- 28th June 2008Describe what syntax highlighting is and how it helps a programmer.
- 29th June 2008Convert the 4-bit binary number 1101 to denary.
- 30th June 2008Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.