Daily Practice · GCSE Computer Science
March 1974 5-a-day
Every sheet in March 1974
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1974Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
- 2nd March 1974State why an organisation might employ penetration testers to test its network.
- 3rd March 1974Describe what a nested loop does when it processes a 2D array.
- 4th March 1974State one example of a file format that commonly uses lossy compression.
- 5th March 1974State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 6th March 1974State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 7th March 1974Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 8th March 1974State the correct order of the three operations used to read data from a text file.
- 9th March 1974Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 10th March 1974Give two reasons why network communication is divided into layers.
- 11th March 1974Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 12th March 1974A 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.
- 13th March 1974Each 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.
- 14th March 1974Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 15th March 1974State the two values a Boolean data type can hold.
- 16th March 1974Convert the denary number 200 to hexadecimal, showing your working.
- 17th March 1974Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 18th March 1974Explain why an interpreter is often preferred while a program is being written.
- 19th March 1974Convert the hexadecimal number 1A to denary.
- 20th March 1974Convert the denary number 156 to an 8 bit binary number.
- 21st March 1974Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 22nd March 1974A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 23rd March 1974An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 24th March 1974A 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.
- 25th March 1974Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 26th March 1974Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 27th March 1974State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 28th March 1974A 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.
- 29th March 1974State the layer that IP operates in, and describe its job.
- 30th March 1974Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 31st March 1974Define the term 'primary key' as used in a database table.