Daily Practice · GCSE Computer Science
July 1995 - GCSE Computer Science 5-a-day
Every sheet in July 1995
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 1995Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 2nd July 1995Define the term 'pixel'.
- 3rd July 1995Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 4th July 1995Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 5th July 1995Evaluate the expression 23 DIV 4.
- 6th July 1995A 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 July 1995A 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 July 1995Define the term protocol.
- 9th July 1995A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 10th July 1995A 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 July 1995A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 12th July 1995An 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 July 1995Complete: NOT 0 = ?
- 14th July 1995Convert the 8-bit binary number 01011010 to denary.
- 15th July 1995State what LAN stands for.
- 16th July 1995Explain the purpose of a breakpoint.
- 17th July 1995An 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 July 1995Which CPU register holds the address of the next instruction to be fetched?
- 19th July 1995Distinguish between the network security threats known as phishing and pharming.
- 20th July 1995Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 21st July 1995A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 22nd July 1995A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 23rd July 1995A 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 July 1995State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 25th July 1995Write 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 July 1995Give one example of an optical secondary storage device.
- 27th July 1995Name the four layers of the TCP/IP model in order from the one closest to the user.
- 28th July 1995State the term used for realistic data that a program would be expected to handle during normal use.
- 29th July 1995State what a foreign key is used for.
- 30th July 1995State the difference between lossy and lossless compression.
- 31st July 1995State the condition that must be met before a binary search can be used on an array.