Daily Practice · GCSE Computer Science
November 1979 5-a-day
Every sheet in November 1979
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 1979Convert the denary number 156 to an 8 bit binary number.
- 2nd November 1979Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 3rd November 1979Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 4th November 1979An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 5th November 1979A 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.
- 6th November 1979Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 7th November 1979Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 8th November 1979State the key difference between a procedure and a function.
- 9th November 1979A 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.
- 10th November 1979Define the term protocol.
- 11th November 1979Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 12th November 1979Give one advantage of a relational database over a flat-file database.
- 13th November 1979Define the term 'interrupt' as used to describe a signal received by a CPU.
- 14th November 1979An 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.
- 15th November 1979Evaluate X = NOT A AND B when A = 0 and B = 1.
- 16th November 1979Convert the hexadecimal number 3F to denary.
- 17th November 1979Give one advantage of a star topology compared with a mesh topology.
- 18th November 1979Explain the purpose of a breakpoint.
- 19th November 1979Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 20th November 1979State the three stages of the fetch-decode-execute cycle in the order they occur.
- 21st November 1979State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 22nd November 1979Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 23rd November 1979Define the term 'pixel'.
- 24th November 1979Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 25th November 1979Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 26th November 1979Evaluate the expression 23 DIV 4.
- 27th November 1979A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
- 28th November 1979A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
- 29th November 1979Name the four layers of the TCP/IP model in order from the one closest to the user.
- 30th November 1979A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?