Daily Practice · GCSE Computer Science
April 1984 5-a-day
Every sheet in April 1984
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1984Explain the purpose of a breakpoint.
- 2nd April 1984Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 3rd April 1984State the three stages of the fetch-decode-execute cycle in the order they occur.
- 4th April 1984State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 5th April 1984Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 6th April 1984Define the term 'pixel'.
- 7th April 1984Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 8th April 1984Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 9th April 1984Evaluate the expression 23 DIV 4.
- 10th April 1984A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
- 11th April 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.
- 12th April 1984Name the four layers of the TCP/IP model in order from the one closest to the user.
- 13th April 1984A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 14th April 1984A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
- 15th April 1984A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 16th April 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.
- 17th April 1984Complete: NOT 0 = ?
- 18th April 1984Convert the 8-bit binary number 01011010 to denary.
- 19th April 1984State what LAN stands for.
- 20th April 1984A 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.
- 21st April 1984An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
- 22nd April 1984Which CPU register holds the address of the next instruction to be fetched?
- 23rd April 1984Distinguish between the network security threats known as phishing and pharming.
- 24th April 1984An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 25th April 1984A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 26th April 1984A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 27th April 1984A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
- 28th April 1984State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 29th April 1984Write 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.
- 30th April 1984Give one example of an optical secondary storage device.