Daily Practice · GCSE Computer Science
July 2011 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in July 2011, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in July 2011
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2011State the condition that must be met before a binary search can be used on an array.
- 2nd July 2011A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 3rd July 2011Convert the hexadecimal number 3F to denary.
- 4th July 2011Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 5th July 2011Name the translator used for assembly language and describe how it differs from a compiler.
- 6th July 2011Convert the denary number 45 to hexadecimal.
- 7th July 2011What does the acronym CPU stand for?
- 8th July 2011State what the term malware means.
- 9th July 2011Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 10th July 2011An 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).
- 11th July 2011Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 12th July 2011Which piece of UK legislation controls how organisations must store and use people's personal data?
- 13th July 2011Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 14th July 2011A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
- 15th July 2011Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 16th July 2011Define the term protocol.
- 17th July 2011A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 18th July 2011A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 19th July 2011State one function carried out by the operating system of a computer.
- 20th July 2011In computational thinking, what is meant by the term 'decomposition'?
- 21st July 2011Given A = 1 and B = 1, state the value of A AND B.
- 22nd July 2011Convert the denary number 39 to an 8-bit binary number, showing your working.
- 23rd July 2011Define a peer-to-peer network.
- 24th July 2011Explain the purpose of a breakpoint.
- 25th July 2011Convert the denary number 5 to a 4-bit binary number.
- 26th July 2011A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 27th July 2011A 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.
- 28th July 2011Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 29th July 2011A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 30th July 2011State the type of program that is typically stored in ROM.
- 31st July 2011State one reason a small business might choose to use open source software instead of proprietary (closed source) software.