Daily Practice · GCSE Computer Science
February 2008 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in February 2008, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in February 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 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.
- 2nd February 2008An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 3rd February 2008Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 4th February 2008Which piece of UK legislation controls how organisations must store and use people's personal data?
- 5th February 2008Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 6th February 2008State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 7th February 2008Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 8th February 2008State the layer that IP operates in, and describe its job.
- 9th February 2008A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 10th February 2008A 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.
- 11th February 2008State one function carried out by the operating system of a computer.
- 12th February 2008In computational thinking, what is meant by the term 'decomposition'?
- 13th February 2008Given A = 1 and B = 1, state the value of A AND B.
- 14th February 2008State how many different values can be represented using 5 bits, and explain your reasoning.
- 15th February 2008Define a peer-to-peer network.
- 16th February 2008Describe what syntax highlighting is and how it helps a programmer.
- 17th February 2008Convert the denary number 5 to a 4-bit binary number.
- 18th February 2008A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 19th February 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.
- 20th February 2008Trace 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).
- 21st February 2008A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 22nd February 2008State the type of program that is typically stored in ROM.
- 23rd February 2008State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 24th February 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.
- 25th February 2008State the key difference between a procedure and a function.
- 26th February 2008State the typical maximum capacity of a single-layer DVD.
- 27th February 2008Explain the role of TCP when a large file is downloaded.
- 28th February 2008State what is meant by a syntax error.
- 29th February 2008Give one advantage of a relational database over a flat-file database.