Daily Practice · GCSE Computer Science
October 1977 5-a-day
Every sheet in October 1977
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 1977An 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.
- 2nd October 1977Which CPU register holds the address of the next instruction to be fetched?
- 3rd October 1977Distinguish between the network security threats known as phishing and pharming.
- 4th October 1977An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 5th October 1977A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 6th October 1977A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 7th October 1977A 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.
- 8th October 1977State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 9th October 1977State the key difference between a procedure and a function.
- 10th October 1977Give one example of an optical secondary storage device.
- 11th October 1977State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 12th October 1977State the term used for realistic data that a program would be expected to handle during normal use.
- 13th October 1977Give one advantage of a relational database over a flat-file database.
- 14th October 1977State the difference between lossy and lossless compression.
- 15th October 1977State the condition that must be met before a binary search can be used on an array.
- 16th October 1977A 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.
- 17th October 1977Convert the hexadecimal number 3F to denary.
- 18th October 1977Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 19th October 1977State why a program written in a high level language must be translated.
- 20th October 1977Convert the denary number 45 to hexadecimal.
- 21st October 1977What does the acronym CPU stand for?
- 22nd October 1977State what the term malware means.
- 23rd October 1977Describe what a nested loop does when it processes a 2D array.
- 24th October 1977An 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).
- 25th October 1977Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 26th October 1977Which piece of UK legislation controls how organisations must store and use people's personal data?
- 27th October 1977Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 28th October 1977A 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.
- 29th October 1977Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 30th October 1977Give two reasons why network communication is divided into layers.
- 31st October 1977A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.