Daily Practice · GCSE Computer Science
July 2003 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in July 2003, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in July 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2003Name the translator used for assembly language and describe how it differs from a compiler.
- 2nd July 2003Convert the 4-bit binary number 1101 to denary.
- 3rd July 2003Two 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.
- 4th July 2003State why an organisation might employ penetration testers to test its network.
- 5th July 2003Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 6th July 2003State one example of a file format that commonly uses lossy compression.
- 7th July 2003State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 8th July 2003State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 9th July 2003Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 10th July 2003State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 11th July 2003Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 12th July 2003Define the term protocol.
- 13th July 2003Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 14th July 2003A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
- 15th July 2003Each 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.
- 16th July 2003Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 17th July 2003State the two values a Boolean data type can hold.
- 18th July 2003State how many different values can be represented using 5 bits, and explain your reasoning.
- 19th July 2003Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 20th July 2003Explain the purpose of a breakpoint.
- 21st July 2003Convert the hexadecimal number 1A to denary.
- 22nd July 2003Convert the denary number 156 to an 8 bit binary number.
- 23rd July 2003Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 24th July 2003Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 25th July 2003An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 26th July 2003A 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.
- 27th July 2003Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 28th July 2003Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 29th July 2003State the key difference between a procedure and a function.
- 30th July 2003A 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.
- 31st July 2003Name the four layers of the TCP/IP model in order from the one closest to the user.