Daily Practice · GCSE Computer Science
December 1953 5-a-day
Every sheet in December 1953
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1953Convert the 8-bit binary number 01011010 to denary.
- 2nd December 1953Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 3rd December 1953Give one advantage and one disadvantage of using a compiler.
- 4th December 1953Convert the hexadecimal number 1A to denary.
- 5th December 1953Convert the denary number 156 to an 8 bit binary number.
- 6th December 1953Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 7th December 1953Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 8th December 1953An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 9th December 1953A 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.
- 10th December 1953Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 11th December 1953Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 12th December 1953Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
- 13th December 1953A 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.
- 14th December 1953A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
- 15th December 1953Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 16th December 1953State what a foreign key is used for.
- 17th December 1953Define the term 'interrupt' as used to describe a signal received by a CPU.
- 18th December 1953An 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.
- 19th December 1953Evaluate X = NOT A AND B when A = 0 and B = 1.
- 20th December 1953A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 21st December 1953Give one advantage of a star topology compared with a mesh topology.
- 22nd December 1953Name the translator used for assembly language and describe how it differs from a compiler.
- 23rd December 1953Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 24th December 1953State the three stages of the fetch-decode-execute cycle in the order they occur.
- 25th December 1953State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 26th December 1953Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 27th December 1953Define the term 'pixel'.
- 28th December 1953Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 29th December 1953Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 30th December 1953Evaluate the expression 23 DIV 4.
- 31st December 1953State the value returned by LENGTH(word) if word stores the string 'Computer'.