Daily Practice · GCSE Computer Science
July 1963 5-a-day
Every sheet in July 1963
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 1963Convert the denary number 5 to a 4-bit binary number.
- 2nd July 1963A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 3rd July 1963A 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.
- 4th July 1963Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 5th July 1963A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 6th July 1963State the type of program that is typically stored in ROM.
- 7th July 1963State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 8th July 1963A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 9th July 1963Write 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.
- 10th July 1963State the typical maximum capacity of a single-layer DVD.
- 11th July 1963Name the four layers of the TCP/IP model in order from the one closest to the user.
- 12th July 1963State what is meant by a syntax error.
- 13th July 1963State what a foreign key is used for.
- 14th July 1963What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 15th July 1963Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 16th July 1963Given P = 0 and Q = 1, state the value of P OR Q.
- 17th July 1963A 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.
- 18th July 1963A 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.
- 19th July 1963A 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.
- 20th July 1963Convert the 4-bit binary number 1101 to denary.
- 21st July 1963Two 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.
- 22nd July 1963State why an organisation might employ penetration testers to test its network.
- 23rd July 1963An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 24th July 1963State one example of a file format that commonly uses lossy compression.
- 25th July 1963State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 26th July 1963State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 27th July 1963Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 28th July 1963State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 29th July 1963Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 30th July 1963State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 31st July 1963Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.