Daily Practice · GCSE Computer Science
September 2014 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in September 2014, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in September 2014
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 2014State one function carried out by the operating system of a computer.
- 2nd September 2014In computational thinking, what is meant by the term 'decomposition'?
- 3rd September 2014Given A = 1 and B = 1, state the value of A AND B.
- 4th September 2014Convert the 8-bit binary number 01011010 to denary.
- 5th September 2014Define a peer-to-peer network.
- 6th September 2014Describe what syntax highlighting is and how it helps a programmer.
- 7th September 2014Convert the denary number 5 to a 4-bit binary number.
- 8th September 2014A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 9th September 2014A 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.
- 10th September 2014Trace 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).
- 11th September 2014A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 12th September 2014State the type of program that is typically stored in ROM.
- 13th September 2014State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 14th September 2014A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 15th September 2014Write 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.
- 16th September 2014State the typical maximum capacity of a single-layer DVD.
- 17th September 2014Explain the role of TCP when a large file is downloaded.
- 18th September 2014State what is meant by a syntax error.
- 19th September 2014State what a foreign key is used for.
- 20th September 2014What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 21st September 2014Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 22nd September 2014Given P = 0 and Q = 1, state the value of P OR Q.
- 23rd September 2014A 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.
- 24th September 2014A 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.
- 25th September 2014Give one advantage and one disadvantage of using a compiler.
- 26th September 2014Convert the 4-bit binary number 1101 to denary.
- 27th September 2014Two 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.
- 28th September 2014State why an organisation might employ penetration testers to test its network.
- 29th September 2014Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 30th September 2014State one example of a file format that commonly uses lossy compression.