Daily Practice · GCSE Computer Science
October 2017 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in October 2017, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in October 2017
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2017Explain the purpose of a breakpoint.
- 2nd October 2017Convert the denary number 45 to hexadecimal.
- 3rd October 2017What does the acronym CPU stand for?
- 4th October 2017State what the term malware means.
- 5th October 2017Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 6th October 2017An 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).
- 7th October 2017Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 8th October 2017Which piece of UK legislation controls how organisations must store and use people's personal data?
- 9th October 2017Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 10th October 2017A 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.
- 11th October 2017Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 12th October 2017Name the four layers of the TCP/IP model in order from the one closest to the user.
- 13th October 2017A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 14th October 2017A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 15th October 2017State one function carried out by the operating system of a computer.
- 16th October 2017In computational thinking, what is meant by the term 'decomposition'?
- 17th October 2017Given A = 1 and B = 1, state the value of A AND B.
- 18th October 2017Convert the denary number 39 to an 8-bit binary number, showing your working.
- 19th October 2017Define a peer-to-peer network.
- 20th October 2017A 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.
- 21st October 2017Convert the denary number 5 to a 4-bit binary number.
- 22nd October 2017A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 23rd October 2017A 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.
- 24th October 2017An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 25th October 2017A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 26th October 2017State the type of program that is typically stored in ROM.
- 27th October 2017State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 28th October 2017A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 29th October 2017Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 30th October 2017State the typical maximum capacity of a single-layer DVD.
- 31st October 2017State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.