Daily Practice · GCSE Computer Science
April 2006 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2006, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2006
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2006Convert the denary number 200 to hexadecimal, showing your working.
- 2nd April 2006Define a peer-to-peer network.
- 3rd April 2006Explain why an interpreter is often preferred while a program is being written.
- 4th April 2006Convert the denary number 5 to a 4-bit binary number.
- 5th April 2006A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 6th April 2006A 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.
- 7th April 2006A 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.
- 8th April 2006A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 9th April 2006State the type of program that is typically stored in ROM.
- 10th April 2006State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 11th April 2006A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 12th April 2006State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
- 13th April 2006State the typical maximum capacity of a single-layer DVD.
- 14th April 2006State the layer that IP operates in, and describe its job.
- 15th April 2006State what is meant by a syntax error.
- 16th April 2006Define the term 'primary key' as used in a database table.
- 17th April 2006What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 18th April 2006Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 19th April 2006Given P = 0 and Q = 1, state the value of P OR Q.
- 20th April 2006Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 21st April 2006A 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.
- 22nd April 2006Describe what syntax highlighting is and how it helps a programmer.
- 23rd April 2006Convert the 4-bit binary number 1101 to denary.
- 24th April 2006Two 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.
- 25th April 2006State why an organisation might employ penetration testers to test its network.
- 26th April 2006Trace 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).
- 27th April 2006State one example of a file format that commonly uses lossy compression.
- 28th April 2006State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 29th April 2006State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 30th April 2006Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.