What is the size of ROM uses in 8051 microcontroller?

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PGCIL NER DT (Electrical) 27 Feb 2022 Official Paper
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  1. 64 Bits 
  2. 4 kb 
  3. 8 kb 
  4. 256 kb 

Answer (Detailed Solution Below)

Option 2 : 4 kb 
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8051 microcontroller

8051 is an 8-bit microcontroller built with 40 pins DIP (dual inline package).

8051 has internal RAM (128 Bytes) and ROM (4K Bytes).

Of the 128-byte internal RAM, only 16 bytes are bit-addressable.

The block diagram of 8051 is shown below:

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