Daily Practice · GCSE Computer Science
January 2016 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 2016, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 2016
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2016State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 2nd January 2016Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 3rd January 2016State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 4th January 2016Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 5th January 2016State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 6th January 2016Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 7th January 2016A 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.
- 8th January 2016Each 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.
- 9th January 2016Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 10th January 2016State the two values a Boolean data type can hold.
- 11th January 2016State how many different values can be represented using 5 bits, and explain your reasoning.
- 12th January 2016Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 13th January 2016State why a program written in a high level language must be translated.
- 14th January 2016Convert the hexadecimal number 1A to denary.
- 15th January 2016Convert the denary number 156 to an 8 bit binary number.
- 16th January 2016Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 17th January 2016Describe what a nested loop does when it processes a 2D array.
- 18th January 2016An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 19th January 2016A 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.
- 20th January 2016Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 21st January 2016Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 22nd January 2016State the key difference between a procedure and a function.
- 23rd January 2016A 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.
- 24th January 2016Give two reasons why network communication is divided into layers.
- 25th January 2016Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 26th January 2016Give one advantage of a relational database over a flat-file database.
- 27th January 2016Define the term 'interrupt' as used to describe a signal received by a CPU.
- 28th January 2016An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 29th January 2016Evaluate X = NOT A AND B when A = 0 and B = 1.
- 30th January 2016Convert the hexadecimal number 3F to denary.
- 31st January 2016Give one advantage of a star topology compared with a mesh topology.