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  1. The string function that returns the index of the first occurrence of substring is _____________.
    1. INSTRING()
    2. INSERT()
    3. INFSTR()
    4. INSTR()
    5. None of these
Correct Option: D

The string function ‘INSTR()’ is used to return the index of the first occurrence of the substring. The function ‘INSERT()’ is used to insert a substring at the specified position up to the specified number of characters.



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