Daily Practice · GCSE Computer Science
March 1955 5-a-day
Every sheet in March 1955
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1955State the two values a Boolean data type can hold.
- 2nd March 1955Convert the 8-bit binary number 01011010 to denary.
- 3rd March 1955Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 4th March 1955A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 5th March 1955Convert the hexadecimal number 1A to denary.
- 6th March 1955Convert the denary number 156 to an 8 bit binary number.
- 7th March 1955Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 8th March 1955An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 9th March 1955An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 10th March 1955A 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.
- 11th March 1955Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 12th March 1955Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 13th March 1955Write 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.
- 14th March 1955A 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.
- 15th March 1955State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 16th March 1955Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 17th March 1955State what a foreign key is used for.
- 18th March 1955Define the term 'interrupt' as used to describe a signal received by a CPU.
- 19th March 1955An 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.
- 20th March 1955Evaluate X = NOT A AND B when A = 0 and B = 1.
- 21st March 1955A 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.
- 22nd March 1955Give one advantage of a star topology compared with a mesh topology.
- 23rd March 1955State why a program written in a high level language must be translated.
- 24th March 1955Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 25th March 1955State the three stages of the fetch-decode-execute cycle in the order they occur.
- 26th March 1955State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 27th March 1955Describe what a nested loop does when it processes a 2D array.
- 28th March 1955Define the term 'pixel'.
- 29th March 1955Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 30th March 1955Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 31st March 1955Evaluate the expression 23 DIV 4.