Daily Practice · GCSE Computer Science
September 1953 5-a-day
Every sheet in September 1953
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1953State the three stages of the fetch-decode-execute cycle in the order they occur.
- 2nd September 1953State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 3rd September 1953Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 4th September 1953Define the term 'pixel'.
- 5th September 1953Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 6th September 1953Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 7th September 1953Evaluate the expression 23 DIV 4.
- 8th September 1953A 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.
- 9th September 1953A 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.
- 10th September 1953Name the four layers of the TCP/IP model in order from the one closest to the user.
- 11th September 1953A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 12th September 1953A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 13th September 1953A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 14th September 1953An 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.
- 15th September 1953Complete: NOT 0 = ?
- 16th September 1953Convert the denary number 39 to an 8-bit binary number, showing your working.
- 17th September 1953State what LAN stands for.
- 18th September 1953A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 19th September 1953An 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.
- 20th September 1953Which CPU register holds the address of the next instruction to be fetched?
- 21st September 1953Distinguish between the network security threats known as phishing and pharming.
- 22nd September 1953An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 23rd September 1953A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 24th September 1953A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 25th September 1953A 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.
- 26th September 1953State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 27th September 1953Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 28th September 1953Give one example of an optical secondary storage device.
- 29th September 1953State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 30th September 1953State the term used for realistic data that a program would be expected to handle during normal use.