Daily Practice · GCSE Computer Science
November 1980 5-a-day
Every sheet in November 1980
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 1980Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 2nd November 1980Evaluate the expression 23 DIV 4.
- 3rd November 1980State the correct order of the three operations used to read data from a text file.
- 4th November 1980A 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.
- 5th November 1980Explain the role of TCP when a large file is downloaded.
- 6th November 1980A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 7th November 1980A 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.
- 8th November 1980A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 9th November 1980An 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.
- 10th November 1980Complete: NOT 0 = ?
- 11th November 1980Convert the denary number 200 to hexadecimal, showing your working.
- 12th November 1980State what LAN stands for.
- 13th November 1980Give one advantage and one disadvantage of using a compiler.
- 14th November 1980An 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.
- 15th November 1980Which CPU register holds the address of the next instruction to be fetched?
- 16th November 1980Distinguish between the network security threats known as phishing and pharming.
- 17th November 1980Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 18th November 1980A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 19th November 1980A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 20th November 1980A 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.
- 21st November 1980State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 22nd November 1980State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 23rd November 1980Give one example of an optical secondary storage device.
- 24th November 1980A 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?
- 25th November 1980State the term used for realistic data that a program would be expected to handle during normal use.
- 26th November 1980Define the term 'primary key' as used in a database table.
- 27th November 1980State the difference between lossy and lossless compression.
- 28th November 1980State the condition that must be met before a binary search can be used on an array.
- 29th November 1980A 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.
- 30th November 1980Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.