Daily Practice · GCSE Computer Science
September 1993 - GCSE Computer Science 5-a-day
Every sheet in September 1993
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1993An 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 September 1993Which CPU register holds the address of the next instruction to be fetched?
- 3rd September 1993Distinguish between the network security threats known as phishing and pharming.
- 4th September 1993Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 5th September 1993A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 6th September 1993A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 7th September 1993A 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 September 1993State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 9th September 1993Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 10th September 1993Give one example of an optical secondary storage device.
- 11th September 1993Define the term protocol.
- 12th September 1993State the term used for realistic data that a program would be expected to handle during normal use.
- 13th September 1993A 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.
- 14th September 1993State the difference between lossy and lossless compression.
- 15th September 1993State the condition that must be met before a binary search can be used on an array.
- 16th September 1993A 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 September 1993Convert the hexadecimal number FF to an 8-bit binary number.
- 18th September 1993Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 19th September 1993Explain the purpose of a breakpoint.
- 20th September 1993Convert the denary number 45 to hexadecimal.
- 21st September 1993What does the acronym CPU stand for?
- 22nd September 1993State what the term malware means.
- 23rd September 1993Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 24th September 1993An 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 September 1993Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 26th September 1993Which piece of UK legislation controls how organisations must store and use people's personal data?
- 27th September 1993Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 28th September 1993State the correct order of the three operations used to read data from a text file.
- 29th September 1993Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 30th September 1993Name the four layers of the TCP/IP model in order from the one closest to the user.