Daily Practice · GCSE Computer Science
May 1976 5-a-day
Every sheet in May 1976
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 1976Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 2nd May 1976Given P = 0 and Q = 1, state the value of P OR Q.
- 3rd May 1976Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
- 4th May 1976A 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.
- 5th May 1976State why a program written in a high level language must be translated.
- 6th May 1976Convert the 4-bit binary number 1101 to denary.
- 7th May 1976Two 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.
- 8th May 1976State why an organisation might employ penetration testers to test its network.
- 9th May 1976Describe what a nested loop does when it processes a 2D array.
- 10th May 1976State one example of a file format that commonly uses lossy compression.
- 11th May 1976State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 12th May 1976State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 13th May 1976Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 14th May 1976A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
- 15th May 1976Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 16th May 1976Give two reasons why network communication is divided into layers.
- 17th May 1976Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 18th May 1976A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
- 19th May 1976Each 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.
- 20th May 1976Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 21st May 1976State the two values a Boolean data type can hold.
- 22nd May 1976Convert the 8-bit binary number 01011010 to denary.
- 23rd May 1976Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 24th May 1976Explain why an interpreter is often preferred while a program is being written.
- 25th May 1976Convert the hexadecimal number 1A to denary.
- 26th May 1976Convert the denary number 156 to an 8 bit binary number.
- 27th May 1976Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 28th May 1976A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 29th May 1976An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 30th May 1976A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 31st May 1976Describe two negative consequences of throwing away old computer hardware instead of recycling it.