Daily Practice · GCSE Computer Science
January 2004 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 2004, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 2004
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2004Give one advantage of a relational database over a flat-file database.
- 2nd January 2004State the difference between lossy and lossless compression.
- 3rd January 2004State the condition that must be met before a binary search can be used on an array.
- 4th January 2004A 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.
- 5th January 2004Convert the hexadecimal number 3F to denary.
- 6th January 2004Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 7th January 2004State why a program written in a high level language must be translated.
- 8th January 2004Convert the denary number 45 to hexadecimal.
- 9th January 2004What does the acronym CPU stand for?
- 10th January 2004State what the term malware means.
- 11th January 2004Describe what a nested loop does when it processes a 2D array.
- 12th January 2004An 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).
- 13th January 2004Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 14th January 2004Which piece of UK legislation controls how organisations must store and use people's personal data?
- 15th January 2004Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 16th January 2004A 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.
- 17th January 2004Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 18th January 2004Give two reasons why network communication is divided into layers.
- 19th January 2004A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 20th January 2004A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 21st January 2004State one function carried out by the operating system of a computer.
- 22nd January 2004In computational thinking, what is meant by the term 'decomposition'?
- 23rd January 2004Given A = 1 and B = 1, state the value of A AND B.
- 24th January 2004Convert the denary number 39 to an 8-bit binary number, showing your working.
- 25th January 2004Define a peer-to-peer network.
- 26th January 2004Explain why an interpreter is often preferred while a program is being written.
- 27th January 2004Convert the denary number 5 to a 4-bit binary number.
- 28th January 2004A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 29th January 2004A 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.
- 30th January 2004A 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.
- 31st January 2004A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.