0478.1.1.06 — positive denary and positive binary • Conversions in both directions, e.g. denary to: past paper questions
Real questions on 0478.1.1.06 — positive denary and positive binary • conversions in both directions, e.g. denary to
The newest 20 of 32 written questions. Open one to see it on the real paper.
- 0478/13 · May/June 2026 · Q8a[2]
The denary numbers 071 and 200 are input. Convert these denary numbers to 8-bit binary numbers. 071 200
See it on the paper → - 0478/13 · May/June 2026 · Q8b[2]
Give the denary numbers that were input for these binary numbers. 00101001 10110100 working space (b) Two binary numbers are 00101001 and 10110100.
See it on the paper → - 0478/12 · February/March 2026 · Q6a[1]
Convert the denary number 150 into an 8‑bit binary number.
See it on the paper → - 0478/13 · October/November 2025 · Q1b(i)[1]
Give the binary number that would be stored when the denary number 24 is entered.
See it on the paper → - 0478/13 · October/November 2025 · Q1b(ii)[1]
Give the binary number that would be stored when the denary number 101 is entered.
See it on the paper → - 0478/13 · October/November 2025 · Q1b(iii)[1]
The binary number 00010011 is stored in the register. Give the denary number that has been entered for this binary number to be stored.
See it on the paper → - 0478/13 · October/November 2025 · Q1b(iv)[1]
The binary number 00100010 is stored in the register. Give the denary number that has been entered for this binary number to be stored.
See it on the paper → - 0478/13 · October/November 2025 · Q1c(i)[1]
Give the binary number that is stored in the register to display the error code 51.
See it on the paper → - 0478/13 · October/November 2025 · Q1c(ii)[1]
Give the binary number that is stored in the register to display the error code E3.
See it on the paper → - 0478/13 · October/November 2025 · Q1c(iii)[1]
Give the hexadecimal number that is displayed when the binary number 10000010 is stored in the register.
See it on the paper → - 0478/12 · May/June 2025 · Q1c[2]
The denary numbers 19 and 230 are converted to binary numbers to be stored in the RAM. Convert the two denary numbers to binary numbers. Working space 230
See it on the paper → - 0478/13 · October/November 2024 · Q1c(i)[2]
Calculate the binary number for the denary number 175. Show all your working.
See it on the paper → - 0478/12 · February/March 2024 · Q2a[4]
The table contains five statements about the role of registers in the fetch–decode–execute cycle of a CPU. Letter Statement A PC stores the address of the next instruction to be accessed B MAR stores the instructions of the program that is running C MDR stores the data passed to it from the PC D ACC stores the result o...
See it on the paper → - 0478/12 · February/March 2024 · Q2b(i)[1]
State what is meant by a 3.5 GHz processor.
See it on the paper → - 0478/12 · February/March 2024 · Q2b(ii)[2]
The CPU is changed to a dual-core 3.5 GHz processor. Explain how the number of cores affects the performance of a CPU.
See it on the paper → - 0478/12 · February/March 2024 · Q2b(iii)[2]
The amount of cache is increased to 64 kB. Explain how the amount of cache affects the performance of a computer.
See it on the paper → - 0478/12 · February/March 2024 · Q2c(i)[2]
Random access memory (RAM) is one example of primary storage. Describe what is meant by RAM.
See it on the paper → - 0478/12 · February/March 2024 · Q2c(ii)[1]
Read only memory (ROM) is another example of primary storage. ROM often stores the start-up instructions for a computer. Identify one other item of data that is commonly stored in ROM.
See it on the paper → - 0478/12 · February/March 2024 · Q2c(iii)[1]
Some computers make use of virtual memory. State the purpose of virtual memory.
See it on the paper → - 0478/12 · February/March 2024 · Q3a[3]
Complete the table by writing each missing OS function name and description. Function name Description managing memory allows application software to run on the computer managing peripherals
See it on the paper →
What examiners said
Comprehensive responses • Most candidates gave the correct 8-bit binary value.
— Examiner report, February/March 2026, 0478/12 Q6(a) (Cambridge)
Most candidates accurately converted the two denary numbers to binary.
— Examiner report, May/June 2025, 0478/12 Q1(c) (Cambridge)
Some candidates were able to provide the correct number of bits. Some candidates incorrectly gave the binary number for the denary number, rather than the number of bits needed.
— Examiner report, May/June 2023, 0478/13 Q1(e) (Cambridge)
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