Daily Practice · GCSE Computer Science
August 2010 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in August 2010, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in August 2010
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2010Describe what a nested loop does when it processes a 2D array.
- 2nd August 2010An 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 August 2010Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 4th August 2010Which piece of UK legislation controls how organisations must store and use people's personal data?
- 5th August 2010Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 6th August 2010State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 7th August 2010Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 8th August 2010Give two reasons why network communication is divided into layers.
- 9th August 2010A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 10th August 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.
- 11th August 2010State one function carried out by the operating system of a computer.
- 12th August 2010In computational thinking, what is meant by the term 'decomposition'?
- 13th August 2010Given A = 1 and B = 1, state the value of A AND B.
- 14th August 2010State how many different values can be represented using 5 bits, and explain your reasoning.
- 15th August 2010Define a peer-to-peer network.
- 16th August 2010Explain why an interpreter is often preferred while a program is being written.
- 17th August 2010Convert the denary number 5 to a 4-bit binary number.
- 18th August 2010A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 19th August 2010A 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 August 2010A 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.
- 21st August 2010A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 22nd August 2010State the type of program that is typically stored in ROM.
- 23rd August 2010State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 24th August 2010A 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 August 2010State the key difference between a procedure and a function.
- 26th August 2010State the typical maximum capacity of a single-layer DVD.
- 27th August 2010State the layer that IP operates in, and describe its job.
- 28th August 2010State what is meant by a syntax error.
- 29th August 2010Give one advantage of a relational database over a flat-file database.
- 30th August 2010What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 31st August 2010Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.