Daily Practice · GCSE Computer Science
December 1971 5-a-day
Every sheet in December 1971
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1971State how many different values can be represented using 5 bits, and explain your reasoning.
- 2nd December 1971Define a peer-to-peer network.
- 3rd December 1971A 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.
- 4th December 1971Convert the denary number 5 to a 4-bit binary number.
- 5th December 1971A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 6th December 1971A 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 December 1971An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 8th December 1971A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 9th December 1971State the type of program that is typically stored in ROM.
- 10th December 1971State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 11th December 1971A 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 December 1971State the key difference between a procedure and a function.
- 13th December 1971State the typical maximum capacity of a single-layer DVD.
- 14th December 1971State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 15th December 1971State what is meant by a syntax error.
- 16th December 1971Give one advantage of a relational database over a flat-file database.
- 17th December 1971What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 18th December 1971Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 19th December 1971Given P = 0 and Q = 1, state the value of P OR Q.
- 20th December 1971Convert the hexadecimal number 3F to denary.
- 21st December 1971A 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 December 1971State why a program written in a high level language must be translated.
- 23rd December 1971Convert the 4-bit binary number 1101 to denary.
- 24th December 1971Two 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 December 1971State why an organisation might employ penetration testers to test its network.
- 26th December 1971Describe what a nested loop does when it processes a 2D array.
- 27th December 1971State one example of a file format that commonly uses lossy compression.
- 28th December 1971State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 29th December 1971State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 30th December 1971Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 31st December 1971A 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.