Daily Practice · GCSE Computer Science
December 2019 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in December 2019, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in December 2019
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 2019State the term used for realistic data that a program would be expected to handle during normal use.
- 2nd December 2019A 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.
- 3rd December 2019State the difference between lossy and lossless compression.
- 4th December 2019State the condition that must be met before a binary search can be used on an array.
- 5th December 2019A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 6th December 2019Convert the hexadecimal number FF to an 8-bit binary number.
- 7th December 2019Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 8th December 2019Explain the purpose of a breakpoint.
- 9th December 2019Convert the denary number 45 to hexadecimal.
- 10th December 2019What does the acronym CPU stand for?
- 11th December 2019State what the term malware means.
- 12th December 2019Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 13th December 2019An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 14th December 2019Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 15th December 2019Which piece of UK legislation controls how organisations must store and use people's personal data?
- 16th December 2019Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 17th December 2019State the correct order of the three operations used to read data from a text file.
- 18th December 2019Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 19th December 2019Name the four layers of the TCP/IP model in order from the one closest to the user.
- 20th December 2019A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 21st December 2019A 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.
- 22nd December 2019State one function carried out by the operating system of a computer.
- 23rd December 2019In computational thinking, what is meant by the term 'decomposition'?
- 24th December 2019Given A = 1 and B = 1, state the value of A AND B.
- 25th December 2019Convert the denary number 200 to hexadecimal, showing your working.
- 26th December 2019Define a peer-to-peer network.
- 27th December 2019A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 28th December 2019Convert the denary number 5 to a 4-bit binary number.
- 29th December 2019A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 30th December 2019A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
- 31st December 2019An array named temps holds 12 values. State the index of the first item and the index of the last item.