MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -4 gates on this package, each with 2 input pins, 1 output pin. The output pin is high only when all input pins are high at the same time.

Detailed explanation-2: -The 74LS21 is an IC which contains two independent 4 input AND gate each of which performs the logic AND function.

Detailed explanation-3: -Because gates are manufactured in IC form, typically containing two to six gates of the same type, it is often uneconomical to use a complete IC of six gates to perform a particular logic function. A better solution may be to use just a single type of gate to perform any of the logic operations required.

Detailed explanation-4: -The IC 7404 chip is a typical logic INVERTER chip that comes with six independent gates. This chip has an operating voltage of 5V. This means that the minimum operating voltage is 4.75V and the maximum is 5.25V.

Detailed explanation-5: -A typical chip might contain four or six individual gates. These chips shrank the size of computers by a factor of about 100 and made them much easier to build. As chip manufacturing techniques improved, more and more transistors could be etched onto a single chip.