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