Daily Practice · GCSE Computer Science
February 1971 5-a-day
Every sheet in February 1971
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1971Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 2nd February 1971Name the translator used for assembly language and describe how it differs from a compiler.
- 3rd February 1971Convert the hexadecimal number 1A to denary.
- 4th February 1971Convert the denary number 156 to an 8 bit binary number.
- 5th February 1971Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 6th February 1971Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 7th February 1971An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 8th February 1971A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 9th February 1971Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 10th February 1971Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 11th February 1971State the key difference between a procedure and a function.
- 12th February 1971A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
- 13th February 1971Define the term protocol.
- 14th February 1971Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 15th February 1971Give one advantage of a relational database over a flat-file database.
- 16th February 1971Define the term 'interrupt' as used to describe a signal received by a CPU.
- 17th February 1971An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 18th February 1971Evaluate X = NOT A AND B when A = 0 and B = 1.
- 19th February 1971Convert the hexadecimal number 3F to denary.
- 20th February 1971Give one advantage of a star topology compared with a mesh topology.
- 21st February 1971Explain the purpose of a breakpoint.
- 22nd February 1971Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 23rd February 1971State the three stages of the fetch-decode-execute cycle in the order they occur.
- 24th February 1971State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 25th February 1971Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 26th February 1971Define the term 'pixel'.
- 27th February 1971Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 28th February 1971Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?