Daily Practice · GCSE Computer Science
June 2014 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in June 2014, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in June 2014
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 2014Convert the hexadecimal number 3F to denary.
- 2nd June 2014A 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.
- 3rd June 2014Name the translator used for assembly language and describe how it differs from a compiler.
- 4th June 2014Convert the 4-bit binary number 1101 to denary.
- 5th June 2014Two 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.
- 6th June 2014State why an organisation might employ penetration testers to test its network.
- 7th June 2014Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 8th June 2014State one example of a file format that commonly uses lossy compression.
- 9th June 2014State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 10th June 2014State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 11th June 2014Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 12th June 2014A 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 June 2014Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 14th June 2014Define the term protocol.
- 15th June 2014Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 16th June 2014A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 17th June 2014Each 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.
- 18th June 2014Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 19th June 2014State the two values a Boolean data type can hold.
- 20th June 2014Convert the denary number 39 to an 8-bit binary number, showing your working.
- 21st June 2014Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 22nd June 2014Explain the purpose of a breakpoint.
- 23rd June 2014Convert the hexadecimal number 1A to denary.
- 24th June 2014Convert the denary number 156 to an 8 bit binary number.
- 25th June 2014Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 26th June 2014Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 27th June 2014An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 28th June 2014A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 29th June 2014Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 30th June 2014Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.