Que. 1 In an 8085 microprocessor system with memory mapped I/O
A I/O devices have 16-bit address
B I/O devices are accessed using IN and OUT instructions
C there can be maximum of 256 input devices and 256 output devices
D arithmetic and logic ooperation can be directly performed with
the I/O data.
Que. 2 four memory clips of 16*4 size have their address bases connected together.
The system will be of size
A 64*64
B 16*16
C 32*8
D 256*1
Que. 3 A switch tail ring counter is made byusing a single D FF.The resulting
ckt is
A SR flip flop
B JK flip flop
C D flip flop
D T flip flop
Que. 4 By placing an inverter between both the input of an SR flip flop,it becomes
A JK flip flop
B D- flip flop
C T flip flop
D master slave JK flip flop
Que.5 A 12-bit ADC is operating with a 1 micro sec clock period and the total
conversion time is seen to be 14micro sec the ADC must be of the
A flash type
B counting type
C integrating type
D successive approximation type
Que. 6 in a 4-bit weighted resistor D/A convertor the resistor value corresponding
to LSB is 16kw. the resistor value corrosponding to the MSB will be
A 1Kohm
B 2Kohm
C 4Kohm
D 16Kohm
Que. 7 The number of Boolean functions that can be generated by a variables,
is equal to
A 2^n
B 2^2n
C 2^(2n-1)
D 2^n-2
Que. 8 A 0 to 6 counter consist of 3 flip flop and a combinational circuit of
2 input gate(s).
A one AND gate
B one OR gate
C one AND gate and one OR gate
D two AND gates
Que. 9 In order to add 1111+1101, we required
A one FA,one HA
B three FA
C three FA,one HA
D none of these
Que. 10 The signed magnitude representation, the binary equivalent of 2205625
is
A 0,10110.1011
B 0,10110.1001
C 1,10101.1001
D 1,10110.1001
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