Daily Practice · GCSE Computer Science
December 1989 5-a-day
Every sheet in December 1989
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1989State what LAN stands for.
- 2nd December 1989Describe what syntax highlighting is and how it helps a programmer.
- 3rd December 1989An 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.
- 4th December 1989Which CPU register holds the address of the next instruction to be fetched?
- 5th December 1989Distinguish between the network security threats known as phishing and pharming.
- 6th December 1989Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 7th December 1989A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 8th December 1989A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 9th December 1989A 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.
- 10th December 1989State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 11th December 1989Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 12th December 1989Give one example of an optical secondary storage device.
- 13th December 1989Explain the role of TCP when a large file is downloaded.
- 14th December 1989State the term used for realistic data that a program would be expected to handle during normal use.
- 15th December 1989A 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.
- 16th December 1989State the difference between lossy and lossless compression.
- 17th December 1989State the condition that must be met before a binary search can be used on an array.
- 18th December 1989A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 19th December 1989Convert the hexadecimal number FF to an 8-bit binary number.
- 20th December 1989Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 21st December 1989Give one advantage and one disadvantage of using a compiler.
- 22nd December 1989Convert the denary number 45 to hexadecimal.
- 23rd December 1989What does the acronym CPU stand for?
- 24th December 1989State what the term malware means.
- 25th December 1989Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 26th December 1989An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 27th December 1989Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 28th December 1989Which piece of UK legislation controls how organisations must store and use people's personal data?
- 29th December 1989Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 30th December 1989State the correct order of the three operations used to read data from a text file.
- 31st December 1989Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.