Daily Practice · GCSE Computer Science
January 2019 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 2019, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 2019
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2019Convert the denary number 45 to hexadecimal.
- 2nd January 2019What does the acronym CPU stand for?
- 3rd January 2019State what the term malware means.
- 4th January 2019A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 5th January 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).
- 6th January 2019Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 7th January 2019Which piece of UK legislation controls how organisations must store and use people's personal data?
- 8th January 2019Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 9th January 2019A 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.
- 10th January 2019Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 11th January 2019State the layer that IP operates in, and describe its job.
- 12th January 2019A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 13th January 2019A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 14th January 2019State one function carried out by the operating system of a computer.
- 15th January 2019In computational thinking, what is meant by the term 'decomposition'?
- 16th January 2019Given A = 1 and B = 1, state the value of A AND B.
- 17th January 2019Convert the denary number 39 to an 8-bit binary number, showing your working.
- 18th January 2019Define a peer-to-peer network.
- 19th January 2019Describe what syntax highlighting is and how it helps a programmer.
- 20th January 2019Convert the denary number 5 to a 4-bit binary number.
- 21st January 2019A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 22nd January 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.
- 23rd January 2019Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 24th January 2019A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 25th January 2019State the type of program that is typically stored in ROM.
- 26th January 2019State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 27th January 2019A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 28th January 2019Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 29th January 2019State the typical maximum capacity of a single-layer DVD.
- 30th January 2019Explain the role of TCP when a large file is downloaded.
- 31st January 2019State what is meant by a syntax error.