Daily Practice · GCSE Computer Science
September 1992 - GCSE Computer Science 5-a-day
Every sheet in September 1992
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1992Evaluate X = NOT A AND B when A = 0 and B = 1.
- 2nd September 1992A 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.
- 3rd September 1992Give one advantage of a star topology compared with a mesh topology.
- 4th September 1992A 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.
- 5th September 1992Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 6th September 1992State the three stages of the fetch-decode-execute cycle in the order they occur.
- 7th September 1992State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 8th September 1992An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 9th September 1992Define the term 'pixel'.
- 10th September 1992Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 11th September 1992Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 12th September 1992Evaluate the expression 23 DIV 4.
- 13th September 1992State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 14th September 1992A 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.
- 15th September 1992State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 16th September 1992A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 17th September 1992A 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.
- 18th September 1992A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 19th September 1992An 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.
- 20th September 1992Complete: NOT 0 = ?
- 21st September 1992State how many different values can be represented using 5 bits, and explain your reasoning.
- 22nd September 1992State what LAN stands for.
- 23rd September 1992State why a program written in a high level language must be translated.
- 24th September 1992An 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.
- 25th September 1992Which CPU register holds the address of the next instruction to be fetched?
- 26th September 1992Distinguish between the network security threats known as phishing and pharming.
- 27th September 1992Describe what a nested loop does when it processes a 2D array.
- 28th September 1992A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 29th September 1992A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 30th September 1992A 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.