Daily Practice · GCSE Computer Science
September 1966 5-a-day
Every sheet in September 1966
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1966Give one advantage and one disadvantage of using a compiler.
- 2nd September 1966Convert the 4-bit binary number 1101 to denary.
- 3rd September 1966Two 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.
- 4th September 1966State why an organisation might employ penetration testers to test its network.
- 5th September 1966Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 6th September 1966State one example of a file format that commonly uses lossy compression.
- 7th September 1966State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 8th September 1966State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 9th September 1966Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 10th September 1966State the correct order of the three operations used to read data from a text file.
- 11th September 1966Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 12th September 1966A 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?
- 13th September 1966Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 14th September 1966A 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.
- 15th September 1966Each 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.
- 16th September 1966Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 17th September 1966State the two values a Boolean data type can hold.
- 18th September 1966Convert the denary number 200 to hexadecimal, showing your working.
- 19th September 1966Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 20th September 1966Name the translator used for assembly language and describe how it differs from a compiler.
- 21st September 1966Convert the hexadecimal number 1A to denary.
- 22nd September 1966Convert the denary number 156 to an 8 bit binary number.
- 23rd September 1966Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 24th September 1966Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 25th September 1966An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 26th September 1966A 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.
- 27th September 1966Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 28th September 1966Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 29th September 1966State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 30th September 1966A 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.