Daily Practice · GCSE Computer Science
September 1979 5-a-day
Every sheet in September 1979
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1979Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 2nd September 1979Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 3rd September 1979Explain why an interpreter is often preferred while a program is being written.
- 4th September 1979Convert the denary number 45 to hexadecimal.
- 5th September 1979What does the acronym CPU stand for?
- 6th September 1979State what the term malware means.
- 7th September 1979A 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.
- 8th September 1979An 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 September 1979Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 10th September 1979Which piece of UK legislation controls how organisations must store and use people's personal data?
- 11th September 1979Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 12th September 1979A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
- 13th September 1979Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 14th September 1979State the layer that IP operates in, and describe its job.
- 15th September 1979A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 16th September 1979A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
- 17th September 1979State one function carried out by the operating system of a computer.
- 18th September 1979In computational thinking, what is meant by the term 'decomposition'?
- 19th September 1979Given A = 1 and B = 1, state the value of A AND B.
- 20th September 1979Convert the 8-bit binary number 01011010 to denary.
- 21st September 1979Define a peer-to-peer network.
- 22nd September 1979Describe what syntax highlighting is and how it helps a programmer.
- 23rd September 1979Convert the denary number 5 to a 4-bit binary number.
- 24th September 1979A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 25th September 1979A 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 September 1979Trace 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).
- 27th September 1979A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 28th September 1979State the type of program that is typically stored in ROM.
- 29th September 1979State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 30th September 1979A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.