Daily Practice · GCSE Computer Science
September 1980 5-a-day
Every sheet in September 1980
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1980A 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.
- 2nd September 1980An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 3rd September 1980A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 4th September 1980State the type of program that is typically stored in ROM.
- 5th September 1980State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 6th September 1980A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 7th September 1980State the key difference between a procedure and a function.
- 8th September 1980State the typical maximum capacity of a single-layer DVD.
- 9th September 1980State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 10th September 1980State what is meant by a syntax error.
- 11th September 1980Give one advantage of a relational database over a flat-file database.
- 12th September 1980What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 13th September 1980Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 14th September 1980Given P = 0 and Q = 1, state the value of P OR Q.
- 15th September 1980Convert the hexadecimal number 3F to denary.
- 16th September 1980A 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.
- 17th September 1980State why a program written in a high level language must be translated.
- 18th September 1980Convert the 4-bit binary number 1101 to denary.
- 19th September 1980Two 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.
- 20th September 1980State why an organisation might employ penetration testers to test its network.
- 21st September 1980Describe what a nested loop does when it processes a 2D array.
- 22nd September 1980State one example of a file format that commonly uses lossy compression.
- 23rd September 1980State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 24th September 1980State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 25th September 1980Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 26th September 1980A 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.
- 27th September 1980Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 28th September 1980Give two reasons why network communication is divided into layers.
- 29th September 1980Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 30th September 1980A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.