Daily Practice · GCSE Computer Science
November 1985 5-a-day
Every sheet in November 1985
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 1985State the correct order of the three operations used to read data from a text file.
- 2nd November 1985A 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.
- 3rd November 1985Give two reasons why network communication is divided into layers.
- 4th November 1985A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 5th November 1985A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 6th November 1985A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 7th November 1985An 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.
- 8th November 1985Complete: NOT 0 = ?
- 9th November 1985Convert the denary number 200 to hexadecimal, showing your working.
- 10th November 1985State what LAN stands for.
- 11th November 1985Explain why an interpreter is often preferred while a program is being written.
- 12th November 1985An 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.
- 13th November 1985Which CPU register holds the address of the next instruction to be fetched?
- 14th November 1985Distinguish between the network security threats known as phishing and pharming.
- 15th November 1985A 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.
- 16th November 1985A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 17th November 1985A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 18th November 1985A 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.
- 19th November 1985State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 20th November 1985State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 21st November 1985Give one example of an optical secondary storage device.
- 22nd November 1985State the layer that IP operates in, and describe its job.
- 23rd November 1985State the term used for realistic data that a program would be expected to handle during normal use.
- 24th November 1985Define the term 'primary key' as used in a database table.
- 25th November 1985State the difference between lossy and lossless compression.
- 26th November 1985State the condition that must be met before a binary search can be used on an array.
- 27th November 1985A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 28th November 1985Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 29th November 1985Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 30th November 1985Describe what syntax highlighting is and how it helps a programmer.