1. selects one of the several inputs and steers it to the output
2. routes the data from a single input to many outputs
3. converts parallel data into serial data
4. is a combinational circuit

Assertion (A): The conditions under which it is possible to write Fourier series of a periodic function are called Drichlet conditions.

Reason (R): If f(t) = - f(- t), it is refereed to as odd symmetry.

1. Acceptor level lies close the valence band.
2. Donor level lies close to the valence band.
3. n type semiconductor behaves as an insulator at 0 K.
4. p type semiconductor behaves as an insulator at 0 K.

1. It increases sensitivity by providing amplification to RF signal
2. It eliminates image frequency interference
3. It increases selectivity
4. It reduces noise level

Match the following:

1. The positiveness of coefficients of characteristic equation is necessary as well as sufficient condition for stability of first and second order systems.
2. The positiveness of coefficients of characteristic equation ensures negativeness of real roots but is not sufficient condition for stability of third and higher order systems.