Daily Practice · GCSE Computer Science
April 2010 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2010, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2010
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2010State the condition that must be met before a binary search can be used on an array.
- 2nd April 2010A 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.
- 3rd April 2010Convert the hexadecimal number 3F to denary.
- 4th April 2010Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 5th April 2010Explain why an interpreter is often preferred while a program is being written.
- 6th April 2010Convert the denary number 45 to hexadecimal.
- 7th April 2010What does the acronym CPU stand for?
- 8th April 2010State what the term malware means.
- 9th April 2010A 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.
- 10th April 2010An 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).
- 11th April 2010Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 12th April 2010Which piece of UK legislation controls how organisations must store and use people's personal data?
- 13th April 2010Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 14th April 2010A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
- 15th April 2010Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 16th April 2010State the layer that IP operates in, and describe its job.
- 17th April 2010A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 18th April 2010A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 19th April 2010State one function carried out by the operating system of a computer.
- 20th April 2010In computational thinking, what is meant by the term 'decomposition'?
- 21st April 2010Given A = 1 and B = 1, state the value of A AND B.
- 22nd April 2010Convert the denary number 39 to an 8-bit binary number, showing your working.
- 23rd April 2010Define a peer-to-peer network.
- 24th April 2010Describe what syntax highlighting is and how it helps a programmer.
- 25th April 2010Convert the denary number 5 to a 4-bit binary number.
- 26th April 2010A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 27th April 2010A 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.
- 28th April 2010Trace 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).
- 29th April 2010A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 30th April 2010State the type of program that is typically stored in ROM.