Daily Practice · GCSE Computer Science
November 1984 5-a-day
Every sheet in November 1984
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 1984An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 2nd November 1984A 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.
- 3rd November 1984Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 4th November 1984Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 5th November 1984State the key difference between a procedure and a function.
- 6th November 1984A 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.
- 7th November 1984Explain the role of TCP when a large file is downloaded.
- 8th November 1984Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 9th November 1984Give one advantage of a relational database over a flat-file database.
- 10th November 1984Define the term 'interrupt' as used to describe a signal received by a CPU.
- 11th November 1984An 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.
- 12th November 1984Evaluate X = NOT A AND B when A = 0 and B = 1.
- 13th November 1984Convert the hexadecimal number 3F to denary.
- 14th November 1984Give one advantage of a star topology compared with a mesh topology.
- 15th November 1984Give one advantage and one disadvantage of using a compiler.
- 16th November 1984Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 17th November 1984State the three stages of the fetch-decode-execute cycle in the order they occur.
- 18th November 1984State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 19th November 1984Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 20th November 1984Define the term 'pixel'.
- 21st November 1984Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 22nd November 1984Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 23rd November 1984Evaluate the expression 23 DIV 4.
- 24th November 1984A 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.
- 25th November 1984A 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.
- 26th November 1984A 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?
- 27th November 1984A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 28th November 1984A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 29th November 1984A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 30th November 1984An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.