Free solved paper Basics of Computer science Number system Binary hexadecimal Flip Flop for Exams

Free solved paper Basics of Computer science Number system Binary hexadecimal Flip Flop for Exams
Free Computer Science Question Papers download
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1.What is the base of octal system
a)      2
b)      8
c)      16
d)      10
Ans:b
2. What is the base of binary system
a)      2
b)      8
c)      16
d)      10
Ans:a
3.What is the base of decimal system
a)      2
b)      8
c)      16
d)      10
Ans:d
4.   What is the base of hexadecimal system
a)      2
b)      8
c)      16
d)      10
Ans:c
5.       Convert 25 (Base 10)  to binary
a)      10010
b)      11001
c)      11110
d)      00111
Ans:b
6.   Convert 5210 to binary
a)      100011
b)      110100
c)      111100
d)      000011
Ans:b
7.   If one of the inputs is low ,then output is also low in
a)      OR
b)      EXOR
c)      NOR
d)      AND
Ans:d
8.  If one of the inputs is high ,then output is also high in
a)      OR
b)      AND
c)      EXOR
d)      NAND
Ans:a
9.  Simplifications of any logic expression by using
a)      Vector analysis
b)      Boolean algebra
c)      matrix analysis
d)      None of these
Ans:b
10 Flip flop has
a)      one state
b)      two states
c)      zero state
d)      none of these
Ans:b
11. If both inputs are same, then output is “0” in
a)      OR
b)      AND
c)      EXOR
d)      NAND
Ans:c
12. RS flip flop is
a)      clocked output
b)      reset/set flip flop
c)      set only
d)      reset only
Ans:b
12.In RS Flip flop,R=0,S=0,then output is
a)      set
b)      reset
c)      last value
d)      illegal
Ans:c
13. In RS Flip flop,R=0,S=1,then output is
a)      set
b)      reset
c)      last value
d)      illegal
Ans:a
14. In RS Flip flop,R=1,S=0,then output is
a)      set
b)      reset
c)      last value
d)      illegal
Ans:b
15.. In RS Flip flop,R=1,S=1,then output is
a)      set
b)      reset
c)      last value
d)      illegal
Ans:d
16. In clocked RS Flip flop, clock=0,R=0,S=0,then output is
a) set
b)reset
c)last value
d)illegal
Ans:c
17. In clocked RS Flip flop, clock=0,R=0,S=1,then output is
a) set
b)reset
c)no change
d)illegal
Ans:c
18 In clocked RS Flip flop, clock=0,R=1,S=0,then output is
a) no change
b)reset
c)set
d)illegal
Ans:a
19. In D Flip flop, clock=1,D=0,then output is
a)0
b)1
c)last value
d)illegal
Ans:a
20. In D Flip flop, clock=1,D=1,then output is
a)0
b)1
c)last value
d)illegal
Ans:b
21.Register is
a)group of transistors
b) group of diodes
c) group of flip flops
d)none of these
Ans:c
22.Counter is activated by
a)      clock
b)      flip flop
c)      register
d)      none of these
Ans:a
23.In asynchronous counter, each filp flop triggered by
a)clock
b)impulse
c)previous flip flop
d)none of these
Ans:c
24. In synchronous counter,each filp flop triggered by
a)clock
b)impulse
c)previous flip flop
d)none of these
Ans:a
25. In asynchronous counter, speed is
a)high
b)very high
c)0
d)limited
Ans:d

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