Daily Practice · GCSE Computer Science
March 2017 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in March 2017, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in March 2017
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2017State one function carried out by the operating system of a computer.
- 2nd March 2017In computational thinking, what is meant by the term 'decomposition'?
- 3rd March 2017Given A = 1 and B = 1, state the value of A AND B.
- 4th March 2017Convert the 8-bit binary number 01011010 to denary.
- 5th March 2017Define a peer-to-peer network.
- 6th March 2017Explain why an interpreter is often preferred while a program is being written.
- 7th March 2017Convert the denary number 5 to a 4-bit binary number.
- 8th March 2017A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 9th March 2017A 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.
- 10th March 2017A 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.
- 11th March 2017A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 12th March 2017State the type of program that is typically stored in ROM.
- 13th March 2017State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 14th March 2017A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 15th March 2017Write 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.
- 16th March 2017State the typical maximum capacity of a single-layer DVD.
- 17th March 2017State the layer that IP operates in, and describe its job.
- 18th March 2017State what is meant by a syntax error.
- 19th March 2017State what a foreign key is used for.
- 20th March 2017What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 21st March 2017Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 22nd March 2017Given P = 0 and Q = 1, state the value of P OR Q.
- 23rd March 2017A 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.
- 24th March 2017A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
- 25th March 2017Describe what syntax highlighting is and how it helps a programmer.
- 26th March 2017Convert the 4-bit binary number 1101 to denary.
- 27th March 2017Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
- 28th March 2017State why an organisation might employ penetration testers to test its network.
- 29th March 2017Trace 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).
- 30th March 2017State one example of a file format that commonly uses lossy compression.
- 31st March 2017State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).