Daily Practice · GCSE Computer Science
May 2015 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2015, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2015
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2015Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 2nd May 2015State the typical maximum capacity of a single-layer DVD.
- 3rd May 2015Give two reasons why network communication is divided into layers.
- 4th May 2015State what is meant by a syntax error.
- 5th May 2015A 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 May 2015What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 7th May 2015Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 8th May 2015Given P = 0 and Q = 1, state the value of P OR Q.
- 9th May 2015Convert the hexadecimal number FF to an 8-bit binary number.
- 10th May 2015A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
- 11th May 2015Explain why an interpreter is often preferred while a program is being written.
- 12th May 2015Convert the 4-bit binary number 1101 to denary.
- 13th May 2015Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
- 14th May 2015State why an organisation might employ penetration testers to test its network.
- 15th May 2015A 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.
- 16th May 2015State one example of a file format that commonly uses lossy compression.
- 17th May 2015State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 18th May 2015State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 19th May 2015Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 20th May 2015State the correct order of the three operations used to read data from a text file.
- 21st May 2015Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 22nd May 2015State the layer that IP operates in, and describe its job.
- 23rd May 2015Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 24th May 2015A 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 May 2015Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
- 26th May 2015Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 27th May 2015State the two values a Boolean data type can hold.
- 28th May 2015Convert the denary number 200 to hexadecimal, showing your working.
- 29th May 2015Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 30th May 2015Describe what syntax highlighting is and how it helps a programmer.
- 31st May 2015Convert the hexadecimal number 1A to denary.