Daily Practice · GCSE Computer Science
February 1956 5-a-day
Every sheet in February 1956
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 1956Explain the role of TCP when a large file is downloaded.
- 2nd February 1956Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 3rd February 1956A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
- 4th February 1956Each 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.
- 5th February 1956Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 6th February 1956State the two values a Boolean data type can hold.
- 7th February 1956State how many different values can be represented using 5 bits, and explain your reasoning.
- 8th February 1956Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 9th February 1956Give one advantage and one disadvantage of using a compiler.
- 10th February 1956Convert the hexadecimal number 1A to denary.
- 11th February 1956Convert the denary number 156 to an 8 bit binary number.
- 12th February 1956Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 13th February 1956Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 14th February 1956An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 15th February 1956A 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.
- 16th February 1956Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 17th February 1956Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 18th February 1956State the key difference between a procedure and a function.
- 19th February 1956A 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.
- 20th February 1956A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
- 21st February 1956Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 22nd February 1956Give one advantage of a relational database over a flat-file database.
- 23rd February 1956Define the term 'interrupt' as used to describe a signal received by a CPU.
- 24th February 1956An 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.
- 25th February 1956Evaluate X = NOT A AND B when A = 0 and B = 1.
- 26th February 1956Convert the hexadecimal number 3F to denary.
- 27th February 1956Give one advantage of a star topology compared with a mesh topology.
- 28th February 1956Name the translator used for assembly language and describe how it differs from a compiler.
- 29th February 1956Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.