Daily Practice · GCSE Computer Science
January 1977 5-a-day
Every sheet in January 1977
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1977A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 2nd January 1977Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
- 3rd January 1977Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 4th January 1977State the two values a Boolean data type can hold.
- 5th January 1977Convert the denary number 39 to an 8-bit binary number, showing your working.
- 6th January 1977Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 7th January 1977A 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.
- 8th January 1977Convert the hexadecimal number 1A to denary.
- 9th January 1977Convert the denary number 156 to an 8 bit binary number.
- 10th January 1977Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 11th January 1977An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 12th January 1977An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 13th January 1977A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 14th January 1977Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 15th January 1977Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 16th January 1977Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 17th January 1977A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
- 18th January 1977State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 19th January 1977Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 20th January 1977A 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.
- 21st January 1977Define the term 'interrupt' as used to describe a signal received by a CPU.
- 22nd January 1977An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 23rd January 1977Evaluate X = NOT A AND B when A = 0 and B = 1.
- 24th January 1977Convert the hexadecimal number FF to an 8-bit binary number.
- 25th January 1977Give one advantage of a star topology compared with a mesh topology.
- 26th January 1977State why a program written in a high level language must be translated.
- 27th January 1977Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 28th January 1977State the three stages of the fetch-decode-execute cycle in the order they occur.
- 29th January 1977State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 30th January 1977Describe what a nested loop does when it processes a 2D array.
- 31st January 1977Define the term 'pixel'.