Daily Practice · GCSE Computer Science
April 2015 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2015, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2015
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2015Convert the hexadecimal number 3F to denary.
- 2nd April 2015Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 3rd April 2015A 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.
- 4th April 2015Convert the denary number 45 to hexadecimal.
- 5th April 2015What does the acronym CPU stand for?
- 6th April 2015State what the term malware means.
- 7th April 2015An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 8th April 2015An 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).
- 9th April 2015Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 10th April 2015Which piece of UK legislation controls how organisations must store and use people's personal data?
- 11th April 2015Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 12th April 2015A 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.
- 13th April 2015Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 14th April 2015State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 15th April 2015A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 16th April 2015A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 17th April 2015State one function carried out by the operating system of a computer.
- 18th April 2015In computational thinking, what is meant by the term 'decomposition'?
- 19th April 2015Given A = 1 and B = 1, state the value of A AND B.
- 20th April 2015Convert the denary number 39 to an 8-bit binary number, showing your working.
- 21st April 2015Define a peer-to-peer network.
- 22nd April 2015State why a program written in a high level language must be translated.
- 23rd April 2015Convert the denary number 5 to a 4-bit binary number.
- 24th April 2015A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 25th April 2015A 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.
- 26th April 2015Describe what a nested loop does when it processes a 2D array.
- 27th April 2015A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 28th April 2015State the type of program that is typically stored in ROM.
- 29th April 2015State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 30th April 2015A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.