Daily Practice · GCSE Computer Science
April 2013 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2013, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2013
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2013Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 2nd April 2013A 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.
- 3rd April 2013Explain the role of TCP when a large file is downloaded.
- 4th April 2013Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 5th April 2013A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
- 6th April 2013Define the term 'interrupt' as used to describe a signal received by a CPU.
- 7th April 2013An 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.
- 8th April 2013Evaluate X = NOT A AND B when A = 0 and B = 1.
- 9th April 2013Convert the hexadecimal number FF to an 8-bit binary number.
- 10th April 2013Give one advantage of a star topology compared with a mesh topology.
- 11th April 2013Give one advantage and one disadvantage of using a compiler.
- 12th April 2013Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 13th April 2013State the three stages of the fetch-decode-execute cycle in the order they occur.
- 14th April 2013State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 15th April 2013Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 16th April 2013Define the term 'pixel'.
- 17th April 2013Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 18th April 2013Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 19th April 2013Evaluate the expression 23 DIV 4.
- 20th April 2013State the correct order of the three operations used to read data from a text file.
- 21st April 2013A 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.
- 22nd April 2013A 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?
- 23rd April 2013A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 24th April 2013A 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.
- 25th April 2013A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 26th April 2013An 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.
- 27th April 2013Complete: NOT 0 = ?
- 28th April 2013Convert the denary number 200 to hexadecimal, showing your working.
- 29th April 2013State what LAN stands for.
- 30th April 2013Name the translator used for assembly language and describe how it differs from a compiler.