XNOR gate By XOR Gate without Applying Not Gate at Output

An XOR gate (also known as an EOR, or EXOR gate) - pronounced as Exclusive OR gate - is a digital logic gate that gives a true (i.e. a HIGH or 1) output when the number of true inputs is odd. An XOR gate implements an exclusive OR, i.e., a true output result occurs if one - and only one - of the gate’s inputs is true. If both inputs are false (i.e. LOW or 0) or both inputs are true, the output is false.
The XNOR gate (also known as a XORN’T, ENOR, EXNOR or NXOR) - and pronounced as Exclusive NOR - is a digital logic gate whose function is the logical complement of the exclusive OR gate (XOR gate). Logically, an XNOR gate is a NOT gate followed by an XOR gate.
The XOR operation of inputs A and B is A ⊕ B; therefore, XNOR operation those inputs will be (A + B) ̅. That means the output of the XOR gate is inverted in the XNOR gate.
XOR represents the inequality function, i.e. the output is true if the inputs are not alike; otherwise, the output is false. A common way to remember the XOR is “must have one or the other, but not both”.