Daily Practice · GCSE Computer Science
February 2016 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in February 2016, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in February 2016
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2016Explain why an interpreter is often preferred while a program is being written.
- 2nd February 2016Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 3rd February 2016State the three stages of the fetch-decode-execute cycle in the order they occur.
- 4th February 2016State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 5th February 2016A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 6th February 2016Define the term 'pixel'.
- 7th February 2016Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 8th February 2016Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 9th February 2016Evaluate the expression 23 DIV 4.
- 10th February 2016A 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.
- 11th February 2016A 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.
- 12th February 2016State the layer that IP operates in, and describe its job.
- 13th February 2016A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 14th February 2016A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 15th February 2016A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 16th February 2016An 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.
- 17th February 2016Complete: NOT 0 = ?
- 18th February 2016Convert the denary number 39 to an 8-bit binary number, showing your working.
- 19th February 2016State what LAN stands for.
- 20th February 2016Describe what syntax highlighting is and how it helps a programmer.
- 21st February 2016An 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.
- 22nd February 2016Which CPU register holds the address of the next instruction to be fetched?
- 23rd February 2016Distinguish between the network security threats known as phishing and pharming.
- 24th February 2016Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 25th February 2016A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 26th February 2016A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 27th February 2016A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
- 28th February 2016State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 29th February 2016Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c