68.

69.

70.

71.

72.

73.

74.

75.

The output F of the given digital logic circuit is
xX

Y
F
2
(A) F=XYZ+XYZ (B) F=XYZ+XYZ
(0) F=XYZ+XYZ (0) F=XYZ+XYZ

The flash type A/D converters are called as
(A) _ parallel non-inverting A/D converter
‏رق‎ parallel counter A/D converter
(C) _ parallel inverting A/D converter
(D) parallel comparator A/D converter

In a microprocessor, the address of the next instruction to be executed is stored in

(4) Address latch (B) General purpose register
(C) Temporary data register (D) Program counter
Which of the following instruction is not valid ?
(A) MOV AX, BX (8) MOV DS, 5000 H
(C) MOV AX, 5000 H (D) PUSH AX

Computer memory which is used to store programs and data currently being processed by
CPU is

(A) mass memory (B) RAM

(6) non-volatile memory (D) PROM

A system is said to be shift invariant only if
(A) ೩ shift in the input signal also results in the corresponding shift in the output.
(B) a shift in the input signal does not exhibit the corresponding shift in the
output.
(C) a shifting level does not vary in an input as well as output.
(D) ೩ shifting at input does not affect the output.

Atmospheric noise become less severe at frequencies
(A) below 30 MHz (B) above 30 MHz
(C) above 30 GHz (2) below 30 GHz

A 2 GHz carrier is DSB SC modulated by a low pass message signal with maximum
frequency of 1 MHz. The resultant signal is to be ideally sampled. The minimum
frequency of the sampling impulse train should be
(A) 2 MHz (B) 2.002 GHz
(C) 4.002 GHz (0) 4MHz
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