Daily Practice · GCSE Computer Science
December 1983 5-a-day
Every sheet in December 1983
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1983Name the four layers of the TCP/IP model in order from the one closest to the user.
- 2nd December 1983Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 3rd December 1983State what a foreign key is used for.
- 4th December 1983Define the term 'interrupt' as used to describe a signal received by a CPU.
- 5th December 1983An 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 December 1983Evaluate X = NOT A AND B when A = 0 and B = 1.
- 7th December 1983A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 8th December 1983Give one advantage of a star topology compared with a mesh topology.
- 9th December 1983A 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.
- 10th December 1983Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 11th December 1983State the three stages of the fetch-decode-execute cycle in the order they occur.
- 12th December 1983State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 13th December 1983An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 14th December 1983Define the term 'pixel'.
- 15th December 1983Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 16th December 1983Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 17th December 1983Evaluate the expression 23 DIV 4.
- 18th December 1983State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 19th December 1983A 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 December 1983State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 21st December 1983A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 22nd December 1983A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
- 23rd December 1983A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 24th December 1983An 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 December 1983Complete: NOT 0 = ?
- 26th December 1983State how many different values can be represented using 5 bits, and explain your reasoning.
- 27th December 1983State what LAN stands for.
- 28th December 1983State why a program written in a high level language must be translated.
- 29th December 1983An 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 December 1983Which CPU register holds the address of the next instruction to be fetched?
- 31st December 1983Distinguish between the network security threats known as phishing and pharming.