41) The inverter OR-gate and AND gate are called decision-making elements because they can recognize some input while disregarding others. A gate recognize a word when its output is

42) Which one of the following set of gates are best suited for ′parity ′ checking and ′parity ′ generation.

43) An AND circuit

44) Which of the following adders can add three or more numbers at a time ?

45) Which one of the following logic expression is incorrect?