31.

32.

33.

34.

35.

36.

87.

38.

Convert binary number 100111.11 to equivalent decimal number:
(A) 39.30 (B) 78.75
(C) 78.30 (D) 39.75

A mod — M counter and a Mod-N counter in cascade gives a:
(^) Mod-MN counter (B) Mod -M/N counter
(C) MOD MN counter (D) None of the above

The condition normally avoided in the basic SR flip flop realized using NAND gate, is:

(A) S=0,R=0 (8) S=1,R=1

(0) S=0,R=1 (D) S=1,R=0
A 4 bit mod-16 ripple counter uses J-K flip flops. If the propagation delay of each flip flop is
20 ns, the maximum clock frequency that can be used is:

(A) 200 MHz (B) 50MHz

(C) 25 MHz 0) 12.5MHz

Which of the following statement is correct about STA instruction of 8085?
(A) Accumulator is loaded with the content of memory
(B) It isa 2-byte instruction
(C) It uses direct addressing mode

(D) It requires three machine cycles

On a negative edge-triggered S-R flip-flop, the outputs reflect the input condition when :
(^) The clock pulse is LOW
(B)_ The clock pulse is HIGH
(C) The clock pulse transitions from LOW to HIGH
(1) The clock pulse transitions from HIGH to LOW

The Boolean expression AB + AC+ BC simplifies to:
(A) 48 + 4८ ©) 48 + 4८ +¢
(0 AC+BC 0) ‏يهم‎ +
The number of T-states in INX instruction in 8085:

(A) 1 (B) 4
(0 6 (D) 10

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