Daily Practice · GCSE Computer Science
February 2011 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in February 2011, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in February 2011
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2011Convert the hexadecimal number 3F to denary.
- 2nd February 2011Give one advantage of a star topology compared with a mesh topology.
- 3rd February 2011Give one advantage and one disadvantage of using a compiler.
- 4th February 2011Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 5th February 2011State the three stages of the fetch-decode-execute cycle in the order they occur.
- 6th February 2011State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 7th February 2011Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 8th February 2011Define the term 'pixel'.
- 9th February 2011Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 10th February 2011Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 11th February 2011Evaluate the expression 23 DIV 4.
- 12th February 2011A 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.
- 13th February 2011A 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.
- 14th February 2011A 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?
- 15th February 2011A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 16th February 2011A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 17th February 2011A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 18th February 2011An 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.
- 19th February 2011Complete: NOT 0 = ?
- 20th February 2011Convert the denary number 39 to an 8-bit binary number, showing your working.
- 21st February 2011State what LAN stands for.
- 22nd February 2011Name the translator used for assembly language and describe how it differs from a compiler.
- 23rd February 2011An 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.
- 24th February 2011Which CPU register holds the address of the next instruction to be fetched?
- 25th February 2011Distinguish between the network security threats known as phishing and pharming.
- 26th February 2011Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 27th February 2011A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 28th February 2011A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.