Daily Practice · GCSE Computer Science
October 1972 5-a-day
Every sheet in October 1972
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1972State what LAN stands for.
- 2nd October 1972Explain why an interpreter is often preferred while a program is being written.
- 3rd October 1972An 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 October 1972Which CPU register holds the address of the next instruction to be fetched?
- 5th October 1972Distinguish between the network security threats known as phishing and pharming.
- 6th October 1972A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 7th October 1972A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 8th October 1972A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 9th October 1972A 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 October 1972State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 11th October 1972State the key difference between a procedure and a function.
- 12th October 1972Give one example of an optical secondary storage device.
- 13th October 1972State the layer that IP operates in, and describe its job.
- 14th October 1972State the term used for realistic data that a program would be expected to handle during normal use.
- 15th October 1972Give one advantage of a relational database over a flat-file database.
- 16th October 1972State the difference between lossy and lossless compression.
- 17th October 1972State the condition that must be met before a binary search can be used on an array.
- 18th October 1972A 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 October 1972Convert the hexadecimal number 3F to denary.
- 20th October 1972Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 21st October 1972Describe what syntax highlighting is and how it helps a programmer.
- 22nd October 1972Convert the denary number 45 to hexadecimal.
- 23rd October 1972What does the acronym CPU stand for?
- 24th October 1972State what the term malware means.
- 25th October 1972Trace 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).
- 26th October 1972An 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 October 1972Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 28th October 1972Which piece of UK legislation controls how organisations must store and use people's personal data?
- 29th October 1972Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 30th October 1972A 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.
- 31st October 1972Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.