Daily Practice · GCSE Computer Science
August 1989 5-a-day
Every sheet in August 1989
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1989A 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.
- 2nd August 1989Explain the role of TCP when a large file is downloaded.
- 3rd August 1989A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 4th August 1989A 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.
- 5th August 1989A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 6th August 1989An 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.
- 7th August 1989Complete: NOT 0 = ?
- 8th August 1989Convert the denary number 200 to hexadecimal, showing your working.
- 9th August 1989State what LAN stands for.
- 10th August 1989Give one advantage and one disadvantage of using a compiler.
- 11th August 1989An 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.
- 12th August 1989Which CPU register holds the address of the next instruction to be fetched?
- 13th August 1989Distinguish between the network security threats known as phishing and pharming.
- 14th August 1989Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 15th August 1989A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 16th August 1989A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 17th August 1989A 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.
- 18th August 1989State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 19th August 1989State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 20th August 1989Give one example of an optical secondary storage device.
- 21st August 1989A 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?
- 22nd August 1989State the term used for realistic data that a program would be expected to handle during normal use.
- 23rd August 1989Define the term 'primary key' as used in a database table.
- 24th August 1989State the difference between lossy and lossless compression.
- 25th August 1989State the condition that must be met before a binary search can be used on an array.
- 26th August 1989A 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.
- 27th August 1989Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 28th August 1989Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 29th August 1989Name the translator used for assembly language and describe how it differs from a compiler.
- 30th August 1989Convert the denary number 45 to hexadecimal.
- 31st August 1989What does the acronym CPU stand for?