How many 2k × 8 ROM chips would be required to build a 16k × 8 memory system?

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VSSC (ISRO) Technician B: Electronic Mechanic Previous Year Paper (Held on 10 Dec 2017)
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  1. 2
  2. 4
  3. 8
  4. 16

Answer (Detailed Solution Below)

Option 3 : 8
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Detailed Solution

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Concept:

ROMRead-Only Memory (ROM) chips are non-volatile memory that generally contains instructions for "booting" the computer (i.e. loading the operating system when the computer starts up).

For 2× m ROM chips we have:

1. n address lines.

2. m bit data lines. 

The total capacity of ROM chips required = Number of ROM chips × Capacity of single ROM chip

Analysis:

Given, the capacity of single-chip = 2k × 8

Required capacity = 16k × 8

Number of ROM chips required = 

= 8

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