Daily Practice · GCSE Computer Science
August 1970 5-a-day
Every sheet in August 1970
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1970A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 2nd August 1970A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 3rd August 1970A 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.
- 4th August 1970State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 5th August 1970Write 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.
- 6th August 1970Give one example of an optical secondary storage device.
- 7th August 1970State the layer that IP operates in, and describe its job.
- 8th August 1970State the term used for realistic data that a program would be expected to handle during normal use.
- 9th August 1970State what a foreign key is used for.
- 10th August 1970State the difference between lossy and lossless compression.
- 11th August 1970State the condition that must be met before a binary search can be used on an array.
- 12th August 1970A 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.
- 13th August 1970A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 14th August 1970Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 15th August 1970Describe what syntax highlighting is and how it helps a programmer.
- 16th August 1970Convert the denary number 45 to hexadecimal.
- 17th August 1970What does the acronym CPU stand for?
- 18th August 1970State what the term malware means.
- 19th August 1970Trace 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).
- 20th August 1970An 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).
- 21st August 1970Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 22nd August 1970Which piece of UK legislation controls how organisations must store and use people's personal data?
- 23rd August 1970Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 24th August 1970State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 25th August 1970Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 26th August 1970Explain the role of TCP when a large file is downloaded.
- 27th August 1970A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 28th August 1970A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
- 29th August 1970State one function carried out by the operating system of a computer.
- 30th August 1970In computational thinking, what is meant by the term 'decomposition'?
- 31st August 1970Given A = 1 and B = 1, state the value of A AND B.