Daily Practice · GCSE Computer Science
April 1962 5-a-day
Every sheet in April 1962
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1962Convert the denary number 5 to a 4-bit binary number.
- 2nd April 1962A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 3rd April 1962A 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 April 1962Trace 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).
- 5th April 1962A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 6th April 1962State the type of program that is typically stored in ROM.
- 7th April 1962State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 8th April 1962A 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 April 1962Write 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 April 1962State the typical maximum capacity of a single-layer DVD.
- 11th April 1962Explain the role of TCP when a large file is downloaded.
- 12th April 1962State what is meant by a syntax error.
- 13th April 1962State what a foreign key is used for.
- 14th April 1962What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 15th April 1962Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 16th April 1962Given P = 0 and Q = 1, state the value of P OR Q.
- 17th April 1962A 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 April 1962A 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 April 1962Give one advantage and one disadvantage of using a compiler.
- 20th April 1962Convert the 4-bit binary number 1101 to denary.
- 21st April 1962Two 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 April 1962State why an organisation might employ penetration testers to test its network.
- 23rd April 1962Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 24th April 1962State one example of a file format that commonly uses lossy compression.
- 25th April 1962State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 26th April 1962State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 27th April 1962Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 28th April 1962State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 29th April 1962Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 30th April 1962A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?