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Consider the following statements regarding the Read Only Memory (ROM): 1. The stored data is lost if the power is removed. 2. It consists of an address decoder with a input lines and a programmable OR array with n output lines. 3. The minterms are ORed through the programmable switches which can be made ON or OFF to select a particular minterm. The programmable switches can be implemented by either bipolar, CMOS, nMOS or pMOS technologies. 4. Mask-programmed ROMs are used in the application where the system requires data to be stored and to be changed during the operation. Which of the above statements are not correct ?

Consider the following statements regarding the Read Only Memory (ROM): 1. The stored data is lost if the power is removed. 2. It consists of an address decoder with a input lines and a programmable OR array with n output lines. 3. The minterms are ORed through the programmable switches which can be made ON or OFF to select a particular minterm. The programmable switches can be implemented by either bipolar, CMOS, nMOS or pMOS technologies. 4. Mask-programmed ROMs are used in the application where the system requires data to be stored and to be changed during the operation. Which of the above statements are not correct ? Correct Answer 1, 2 and 4 only

Note: It is asked in the question that which statements are NOT correct.

Analysing each statement:

Statement 1: It is wrong because ROM is a permanent memory and it doesn't lose data when power is OFF.

Statement 2: It is wrong, because ROM consist of decoders of K input lines with n output lines.

Statement 3: It is correct.

Statement 4: It is wrong because in marked program ROM data is stored at manufacturing end according to user's demand of cannot be changed during the operation.

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