Daily Practice · GCSE Computer Science
July 2019 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in July 2019, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in July 2019
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2019A 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?
- 2nd July 2019Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 3rd July 2019A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
- 4th July 2019Define the term 'interrupt' as used to describe a signal received by a CPU.
- 5th July 2019An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 6th July 2019Evaluate X = NOT A AND B when A = 0 and B = 1.
- 7th July 2019Convert the hexadecimal number FF to an 8-bit binary number.
- 8th July 2019Give one advantage of a star topology compared with a mesh topology.
- 9th July 2019Name the translator used for assembly language and describe how it differs from a compiler.
- 10th July 2019Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 11th July 2019State the three stages of the fetch-decode-execute cycle in the order they occur.
- 12th July 2019State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 13th July 2019Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 14th July 2019Define the term 'pixel'.
- 15th July 2019Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 16th July 2019Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 17th July 2019Evaluate the expression 23 DIV 4.
- 18th July 2019State the correct order of the three operations used to read data from a text file.
- 19th July 2019A 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.
- 20th July 2019Define the term protocol.
- 21st July 2019A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 22nd July 2019A 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.
- 23rd July 2019A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 24th July 2019An 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.
- 25th July 2019Complete: NOT 0 = ?
- 26th July 2019Convert the denary number 200 to hexadecimal, showing your working.
- 27th July 2019State what LAN stands for.
- 28th July 2019Explain the purpose of a breakpoint.
- 29th July 2019An 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.
- 30th July 2019Which CPU register holds the address of the next instruction to be fetched?
- 31st July 2019Distinguish between the network security threats known as phishing and pharming.