Daily Practice · GCSE Computer Science
December 1958 5-a-day
Every sheet in December 1958
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1958Explain why an interpreter is often preferred while a program is being written.
- 2nd December 1958Convert the hexadecimal number 1A to denary.
- 3rd December 1958Convert the denary number 156 to an 8 bit binary number.
- 4th December 1958Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 5th December 1958A 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.
- 6th December 1958An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 7th December 1958A 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.
- 8th December 1958Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 9th December 1958Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 10th December 1958Write 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.
- 11th December 1958A 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.
- 12th December 1958State the layer that IP operates in, and describe its job.
- 13th December 1958Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 14th December 1958State what a foreign key is used for.
- 15th December 1958Define the term 'interrupt' as used to describe a signal received by a CPU.
- 16th December 1958An 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.
- 17th December 1958Evaluate X = NOT A AND B when A = 0 and B = 1.
- 18th December 1958A 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.
- 19th December 1958Give one advantage of a star topology compared with a mesh topology.
- 20th December 1958Describe what syntax highlighting is and how it helps a programmer.
- 21st December 1958Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 22nd December 1958State the three stages of the fetch-decode-execute cycle in the order they occur.
- 23rd December 1958State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 24th December 1958Trace 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).
- 25th December 1958Define the term 'pixel'.
- 26th December 1958Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 27th December 1958Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 28th December 1958Evaluate the expression 23 DIV 4.
- 29th December 1958State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 30th December 1958A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
- 31st December 1958Explain the role of TCP when a large file is downloaded.