Daily Practice · GCSE Computer Science
November 1974 5-a-day
Every sheet in November 1974
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 1974A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 2nd November 1974Convert the hexadecimal number 1A to denary.
- 3rd November 1974Convert the denary number 156 to an 8 bit binary number.
- 4th November 1974Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 5th November 1974An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 6th November 1974An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 7th November 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.
- 8th November 1974Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 9th November 1974Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 10th November 1974State the key difference between a procedure and a function.
- 11th November 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.
- 12th November 1974State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 13th November 1974Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 14th November 1974Give one advantage of a relational database over a flat-file database.
- 15th November 1974Define the term 'interrupt' as used to describe a signal received by a CPU.
- 16th November 1974An 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.
- 17th November 1974Evaluate X = NOT A AND B when A = 0 and B = 1.
- 18th November 1974Convert the hexadecimal number 3F to denary.
- 19th November 1974Give one advantage of a star topology compared with a mesh topology.
- 20th November 1974State why a program written in a high level language must be translated.
- 21st November 1974Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 22nd November 1974State the three stages of the fetch-decode-execute cycle in the order they occur.
- 23rd November 1974State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 24th November 1974Describe what a nested loop does when it processes a 2D array.
- 25th November 1974Define the term 'pixel'.
- 26th November 1974Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 27th November 1974Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 28th November 1974Evaluate the expression 23 DIV 4.
- 29th November 1974A 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.
- 30th November 1974A 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.