Daily Practice · GCSE Computer Science
October 2007 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in October 2007, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in October 2007
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2007State the difference between lossy and lossless compression.
- 2nd October 2007State the condition that must be met before a binary search can be used on an array.
- 3rd October 2007A 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.
- 4th October 2007Convert the hexadecimal number 3F to denary.
- 5th October 2007Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 6th October 2007Describe what syntax highlighting is and how it helps a programmer.
- 7th October 2007Convert the denary number 45 to hexadecimal.
- 8th October 2007What does the acronym CPU stand for?
- 9th October 2007State what the term malware means.
- 10th October 2007Trace 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 October 2007An 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).
- 12th October 2007Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 13th October 2007Which piece of UK legislation controls how organisations must store and use people's personal data?
- 14th October 2007Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 15th October 2007A 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.
- 16th October 2007Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 17th October 2007Explain the role of TCP when a large file is downloaded.
- 18th October 2007A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 19th October 2007A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 20th October 2007State one function carried out by the operating system of a computer.
- 21st October 2007In computational thinking, what is meant by the term 'decomposition'?
- 22nd October 2007Given A = 1 and B = 1, state the value of A AND B.
- 23rd October 2007Convert the denary number 39 to an 8-bit binary number, showing your working.
- 24th October 2007Define a peer-to-peer network.
- 25th October 2007Give one advantage and one disadvantage of using a compiler.
- 26th October 2007Convert the denary number 5 to a 4-bit binary number.
- 27th October 2007A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 28th October 2007A 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.
- 29th October 2007Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 30th October 2007A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 31st October 2007State the type of program that is typically stored in ROM.