Daily Practice · GCSE Computer Science
March 1989 5-a-day
Every sheet in March 1989
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1989State the correct order of the three operations used to read data from a text file.
- 2nd March 1989Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 3rd March 1989State the layer that IP operates in, and describe its job.
- 4th March 1989Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 5th March 1989A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 6th March 1989Each 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.
- 7th March 1989Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 8th March 1989State the two values a Boolean data type can hold.
- 9th March 1989Convert the denary number 200 to hexadecimal, showing your working.
- 10th March 1989Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 11th March 1989Describe what syntax highlighting is and how it helps a programmer.
- 12th March 1989Convert the hexadecimal number 1A to denary.
- 13th March 1989Convert the denary number 156 to an 8 bit binary number.
- 14th March 1989Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 15th March 1989Trace 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).
- 16th March 1989An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 17th March 1989A 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.
- 18th March 1989Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 19th March 1989Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 20th March 1989State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 21st March 1989A 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.
- 22nd March 1989Explain the role of TCP when a large file is downloaded.
- 23rd March 1989Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 24th March 1989Define the term 'primary key' as used in a database table.
- 25th March 1989Define the term 'interrupt' as used to describe a signal received by a CPU.
- 26th March 1989An 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.
- 27th March 1989Evaluate X = NOT A AND B when A = 0 and B = 1.
- 28th March 1989Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 29th March 1989Give one advantage of a star topology compared with a mesh topology.
- 30th March 1989Give one advantage and one disadvantage of using a compiler.
- 31st March 1989Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.