Daily Practice · GCSE Computer Science
March 1957 5-a-day
Every sheet in March 1957
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 1957A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 2nd March 1957A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
- 3rd March 1957State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 4th March 1957State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 5th March 1957Give one example of an optical secondary storage device.
- 6th March 1957Explain the role of TCP when a large file is downloaded.
- 7th March 1957State the term used for realistic data that a program would be expected to handle during normal use.
- 8th March 1957Define the term 'primary key' as used in a database table.
- 9th March 1957State the difference between lossy and lossless compression.
- 10th March 1957State the condition that must be met before a binary search can be used on an array.
- 11th March 1957A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 12th March 1957Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 13th March 1957Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 14th March 1957Give one advantage and one disadvantage of using a compiler.
- 15th March 1957Convert the denary number 45 to hexadecimal.
- 16th March 1957What does the acronym CPU stand for?
- 17th March 1957State what the term malware means.
- 18th March 1957Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 19th March 1957An 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).
- 20th March 1957Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 21st March 1957Which piece of UK legislation controls how organisations must store and use people's personal data?
- 22nd March 1957Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 23rd March 1957A 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.
- 24th March 1957Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 25th March 1957A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
- 26th March 1957A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 27th March 1957A 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;
- 28th March 1957State one function carried out by the operating system of a computer.
- 29th March 1957In computational thinking, what is meant by the term 'decomposition'?
- 30th March 1957Given A = 1 and B = 1, state the value of A AND B.
- 31st March 1957Convert the 8-bit binary number 01011010 to denary.