Daily Practice · GCSE Computer Science
April 1994 - GCSE Computer Science 5-a-day
Every sheet in April 1994
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1994A 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.
- 2nd April 1994Define the term 'pixel'.
- 3rd April 1994Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 4th April 1994Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 5th April 1994Evaluate the expression 23 DIV 4.
- 6th April 1994A 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.
- 7th April 1994A 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.
- 8th April 1994State the layer that IP operates in, and describe its job.
- 9th April 1994A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 10th April 1994A 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;
- 11th April 1994A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 12th April 1994An 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.
- 13th April 1994Complete: NOT 0 = ?
- 14th April 1994Convert the 8-bit binary number 01011010 to denary.
- 15th April 1994State what LAN stands for.
- 16th April 1994Describe what syntax highlighting is and how it helps a programmer.
- 17th April 1994An 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.
- 18th April 1994Which CPU register holds the address of the next instruction to be fetched?
- 19th April 1994Distinguish between the network security threats known as phishing and pharming.
- 20th April 1994Trace 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).
- 21st April 1994A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 22nd April 1994A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 23rd April 1994A 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.
- 24th April 1994State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 25th April 1994Write 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.
- 26th April 1994Give one example of an optical secondary storage device.
- 27th April 1994Explain the role of TCP when a large file is downloaded.
- 28th April 1994State the term used for realistic data that a program would be expected to handle during normal use.
- 29th April 1994State what a foreign key is used for.
- 30th April 1994State the difference between lossy and lossless compression.