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  1. Which string function returns the index of the first occurrence of substring?
    1. INFSTR()
    2. INSTRING()
    3. INSTR()
    4. INSERT()
    5. None of these
Correct Option: C

The string funtion ‘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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