Daily Practice · GCSE Computer Science
May 2020 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2020, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2020
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2020State what is meant by a syntax error.
- 2nd May 2020A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
- 3rd May 2020What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 4th May 2020Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 5th May 2020Given P = 0 and Q = 1, state the value of P OR Q.
- 6th May 2020Convert the hexadecimal number FF to an 8-bit binary number.
- 7th May 2020A 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.
- 8th May 2020A 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.
- 9th May 2020Convert the 4-bit binary number 1101 to denary.
- 10th May 2020Two 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.
- 11th May 2020State why an organisation might employ penetration testers to test its network.
- 12th May 2020An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 13th May 2020State one example of a file format that commonly uses lossy compression.
- 14th May 2020State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 15th May 2020State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 16th May 2020Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 17th May 2020State the correct order of the three operations used to read data from a text file.
- 18th May 2020Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 19th May 2020State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 20th May 2020Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 21st May 2020A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 22nd May 2020Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
- 23rd May 2020Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 24th May 2020State the two values a Boolean data type can hold.
- 25th May 2020Convert the denary number 200 to hexadecimal, showing your working.
- 26th May 2020Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 27th May 2020State why a program written in a high level language must be translated.
- 28th May 2020Convert the hexadecimal number 1A to denary.
- 29th May 2020Convert the denary number 156 to an 8 bit binary number.
- 30th May 2020Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 31st May 2020Describe what a nested loop does when it processes a 2D array.