Daily Practice · GCSE Computer Science
August 1995 - GCSE Computer Science 5-a-day
Every sheet in August 1995
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 1995A 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.
- 2nd August 1995A 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.
- 3rd August 1995Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 4th August 1995A 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.
- 5th August 1995Convert the denary number 45 to hexadecimal.
- 6th August 1995What does the acronym CPU stand for?
- 7th August 1995State what the term malware means.
- 8th August 1995An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 9th August 1995An 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).
- 10th August 1995Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 11th August 1995Which piece of UK legislation controls how organisations must store and use people's personal data?
- 12th August 1995Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 13th August 1995State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 14th August 1995Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 15th August 1995State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 16th August 1995A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 17th August 1995A 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.
- 18th August 1995State one function carried out by the operating system of a computer.
- 19th August 1995In computational thinking, what is meant by the term 'decomposition'?
- 20th August 1995Given A = 1 and B = 1, state the value of A AND B.
- 21st August 1995State how many different values can be represented using 5 bits, and explain your reasoning.
- 22nd August 1995Define a peer-to-peer network.
- 23rd August 1995State why a program written in a high level language must be translated.
- 24th August 1995Convert the denary number 5 to a 4-bit binary number.
- 25th August 1995A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 26th August 1995A 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.
- 27th August 1995Describe what a nested loop does when it processes a 2D array.
- 28th August 1995A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 29th August 1995State the type of program that is typically stored in ROM.
- 30th August 1995State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 31st August 1995A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.