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1.2 Memory & Storage Diagnostic

Definitive 21-Question Diagnostic | Spec J277 Baseline

Question 1 3 Marks

Complete the RAM vs ROM Comparison.

CharacteristicRAMROM
Volatile (loses data on power loss)
Stores currently running apps/OS
Stores startup instructions (BIOS)
Question 2 2 Marks

Explain why Virtual Memory is needed and its primary drawback.

Question 3 3 Marks

Match the Technology to the J277 Physical Method.

MethodOpticalMagneticSolid State
Uses laser light to read markers
Uses magnetised platters/moving parts
Uses flash memory with no moving parts
Question 10 2 Marks

Add the following 8-bit numbers: 01010101 + 01111111.

1286432168421
01010101
01111111

Row 4: Carry Bits | Row 5: Final Sum

Question 4 2 Marks

Identify two secondary storage devices typically used for backups.

Question 5 2 Marks

AO2 Scenario: A school needs storage for student files. Why is an HDD often chosen over an SSD for high-capacity servers?

Question 6 3 Marks

Rank these based on Speed (1 = Fastest, 3 = Slowest).

Solid State:
Magnetic:
Optical:
Question 7 3 Marks

Perform the following conversions using J277 Base-10 (1,000).

4 KB to Bytes:
2 Gigabytes to MB:
3 Terabytes to GB:
Question 8 2 Marks

Calculate the file size of a text document containing 2,000 characters (using 8-bit ASCII).

Answer in Bits:
Answer in Bytes:
Question 9 2 Marks

Convert the Denary number 165 into 8-bit Binary.

Question 11 2 Marks

Identify the result of a Logical Left Shift (2 places) on the binary number 00001011.

Question 12 1 Mark

Convert Hexadecimal A3 into Denary.

Question 13 2 Marks

[Spec Logic] Character Ordering: In a character set, 'A' is stored as 65. Identify the code for 'C'.

Code in Denary:
Explain why:
Question 14 2 Marks

What is the purpose of Metadata in an image file?

Question 15 3 Marks

Identify the impact of increasing the Sample Rate of an audio file.

Question 16 2 Marks

Describe the relationship between Resolution and File Size.

Question 17 2 Marks

Compare Lossy and Lossless compression.

CompressionRestorable?Permanent Loss?
Lossy
Lossless
Question 18 2 Marks

Explain why Lossy Compression is unsuitable for computer programs/executables.

Question 19 2 Marks

In 8-bit binary, what is the maximum number of decimal values that can be represented?

Question 20 2 Marks

Arrange these units from Smallest to Largest: GB, PB, TB, MB.

Question 21 2 Marks

Define the Least Significant Bit (LSB) and identify its value in 11110001.

Position:
Value in this number:
Question 22 2 Marks

[AO2 Scenario] Storage Calculation: A document uses 10,000 characters. Explain why the file size would be larger if stored using Unicode rather than ASCII.