Daily Practice · GCSE Computer Science
March 1987 5-a-day
Every sheet in March 1987
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1987Explain the purpose of a breakpoint.
- 2nd March 1987Convert the denary number 45 to hexadecimal.
- 3rd March 1987What does the acronym CPU stand for?
- 4th March 1987State what the term malware means.
- 5th March 1987Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 6th March 1987An 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 March 1987Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 8th March 1987Which piece of UK legislation controls how organisations must store and use people's personal data?
- 9th March 1987Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 10th March 1987A 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.
- 11th March 1987Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 12th March 1987Name the four layers of the TCP/IP model in order from the one closest to the user.
- 13th March 1987A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 14th March 1987A 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;
- 15th March 1987State one function carried out by the operating system of a computer.
- 16th March 1987In computational thinking, what is meant by the term 'decomposition'?
- 17th March 1987Given A = 1 and B = 1, state the value of A AND B.
- 18th March 1987Convert the 8-bit binary number 01011010 to denary.
- 19th March 1987Define a peer-to-peer network.
- 20th March 1987A 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 March 1987Convert the denary number 5 to a 4-bit binary number.
- 22nd March 1987A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 23rd March 1987A 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 March 1987An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 25th March 1987A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 26th March 1987State the type of program that is typically stored in ROM.
- 27th March 1987State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 28th March 1987A 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 March 1987Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
- 30th March 1987State the typical maximum capacity of a single-layer DVD.
- 31st March 1987State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.