Daily Practice · GCSE Computer Science
January 1963 5-a-day
Every sheet in January 1963
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1963A 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.
- 2nd January 1963Explain the role of TCP when a large file is downloaded.
- 3rd January 1963Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 4th January 1963Define the term 'primary key' as used in a database table.
- 5th January 1963Define the term 'interrupt' as used to describe a signal received by a CPU.
- 6th January 1963An 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.
- 7th January 1963Evaluate X = NOT A AND B when A = 0 and B = 1.
- 8th January 1963Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 9th January 1963Give one advantage of a star topology compared with a mesh topology.
- 10th January 1963Give one advantage and one disadvantage of using a compiler.
- 11th January 1963Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 12th January 1963State the three stages of the fetch-decode-execute cycle in the order they occur.
- 13th January 1963State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 14th January 1963Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 15th January 1963Define the term 'pixel'.
- 16th January 1963Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 17th January 1963Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 18th January 1963Evaluate the expression 23 DIV 4.
- 19th January 1963A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
- 20th January 1963A 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.
- 21st January 1963A 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?
- 22nd January 1963A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 23rd January 1963A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
- 24th January 1963A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 25th January 1963An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
- 26th January 1963Complete: NOT 0 = ?
- 27th January 1963Convert the 8-bit binary number 01011010 to denary.
- 28th January 1963State what LAN stands for.
- 29th January 1963Name the translator used for assembly language and describe how it differs from a compiler.
- 30th January 1963An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
- 31st January 1963Which CPU register holds the address of the next instruction to be fetched?