Daily Practice · GCSE Computer Science
November 2019 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in November 2019, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in November 2019
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 2019Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 2nd November 2019State the three stages of the fetch-decode-execute cycle in the order they occur.
- 3rd November 2019State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 4th November 2019Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 5th November 2019Define the term 'pixel'.
- 6th November 2019Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 7th November 2019Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 8th November 2019Evaluate the expression 23 DIV 4.
- 9th November 2019A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
- 10th November 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.
- 11th November 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?
- 12th November 2019A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 13th November 2019A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 14th November 2019A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 15th November 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.
- 16th November 2019Complete: NOT 0 = ?
- 17th November 2019Convert the denary number 39 to an 8-bit binary number, showing your working.
- 18th November 2019State what LAN stands for.
- 19th November 2019Name the translator used for assembly language and describe how it differs from a compiler.
- 20th November 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.
- 21st November 2019Which CPU register holds the address of the next instruction to be fetched?
- 22nd November 2019Distinguish between the network security threats known as phishing and pharming.
- 23rd November 2019Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 24th November 2019A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 25th November 2019A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 26th November 2019A 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.
- 27th November 2019State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 28th November 2019Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 29th November 2019Give one example of an optical secondary storage device.
- 30th November 2019Define the term protocol.