## Thursday, May 19, 2011

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

##### SOCIALIZE IT →

Free solved paper Basics of Computer science Number system Binary hexadecimal Flip Flop for Exams
FREE EXAM SOLVED PAPER Computer science
Computer Science Question papers Free .
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