Daily Practice · GCSE Computer Science
January 2006 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 2006, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 2006
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2006State why an organisation might employ penetration testers to test its network.
- 2nd January 2006Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 3rd January 2006State one example of a file format that commonly uses lossy compression.
- 4th January 2006State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 5th January 2006State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 6th January 2006Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 7th January 2006State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 8th January 2006Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 9th January 2006A 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?
- 10th January 2006Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 11th January 2006A 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.
- 12th January 2006Each 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.
- 13th January 2006Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 14th January 2006State the two values a Boolean data type can hold.
- 15th January 2006State how many different values can be represented using 5 bits, and explain your reasoning.
- 16th January 2006Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 17th January 2006Name the translator used for assembly language and describe how it differs from a compiler.
- 18th January 2006Convert the hexadecimal number 1A to denary.
- 19th January 2006Convert the denary number 156 to an 8 bit binary number.
- 20th January 2006Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 21st January 2006Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 22nd January 2006An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 23rd January 2006A 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.
- 24th January 2006Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 25th January 2006Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 26th January 2006State the key difference between a procedure and a function.
- 27th January 2006A 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.
- 28th January 2006Define the term protocol.
- 29th January 2006Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 30th January 2006Give one advantage of a relational database over a flat-file database.
- 31st January 2006Define the term 'interrupt' as used to describe a signal received by a CPU.