1. A
box contains six red balls and four green balls. Four balls are selected at
random from the box. What is the probability that two of the selected balls are
red and two are green?

(A) 3/7 (B)
4/7

(C) 5/7 (D)
6/7

Answer: A

Explanation:

^{C(6,2)C(4,2)}/

_{C(10,4)}

*n*’ vertices is equal to:

(A)

*n*(*n*-1) (B)*n*(*n*-1)/2
(C)

*n*^{2}(D) 2*n*-1
Answer: B

3. A
context free grammar is:

(A) type 0 (B)
type 1

(C) type 2 (D)
type 3

Answer: C

4. Let

*e*: B^{˄}*m*→B^{˄}*n*is a group code. The minimum distance of ‘*e*’ is equal to:
(A) the maximum weight of a non zero code
word

(B) the minimum weight of a non zero code
word

(C)

*m*
(D)

*n*
Answer: B

5. Consider
a Moore Machine M whose digraph is:

Then L(M), the language accepted by the
machine M, is the set of all strings having:

(A) two or more b’s

(B) three or more b’s

(C) two or more a’s

(D) three or more a’s

Answer: A

6. A
WFF that is equivalent to the WFF x=>y is:

(A)

*y*=>*x*(B) ~*y*=>*x*
(C) ~

*y*=>~*x*(D)*y*=>~*x*
Answer: B

7. Simplified
form of Boolean expression xy+(~x)z+yz is:

(A) xy+(~x)z (B)
(~x)y+(~x)z

(C) (~x)y+xz (D)
xy+xz

Answer: A

8. In
order to build a MOD-18 counter, the minimum number of flip flops needed is
equal to:

(A) 18 (B)
9

(C) 5 (D)
4

Answer: C

Explanation:

With 'n' no. of flip-flops you can get upto
max. modulo-[2^n] counter.

Therefore for modulo-18 counter 2^5 = 32
which is greater than 18 and 2^4 = 16 which is less than 18. Hence we require 5
flip-flops.

9. The
dual of the switching function F=x+yz is given by:
(A) x+yz

(B) x(y+z)

(C) (~x)+(~y)(~z)

(D) (~x)((~y)+(~z))

Answer: B

10. Amongst
the logic families DTL, TTL, ECL and CMOS, the family with the least power
dissipation is:

(A) CMOS (B)
DTL

(C) TTL (D)
ECL

Answer: A

11. What
cannot replace ‘?’ in the following C code to print all odd numbers less than
100?

for(i=1;?;i+2)

printf(“%d\n”,i);

(A) i≤100 (B)
i≤101

(C) i<100 (D)
i<101

Answer: B

12. Consider
the following linked list:

Which of the following piece of code will
insert the node pointed to by q at the end of the list ?

(A) for (p=list; p!=NULL; p=p→next);

p=q;

(B) for (p=list; p!=NULL; p=p→next);

p→next=q;

(C) for (p=list; p→next !=NULL; p=p→next);

p=q;

(D) for (p=list; p→next !=NULL; p=p→next);

p→next=q;

Answer: D

13. Which
of the following is a valid C code to print character ‘A’ to ‘C’ ?

(A) x=’A’;

switch(x)

{case ‘A’=printf (“%d\n”, x);

....

case ‘C’=printf (“%d\n”, x);

}

(B) x=’A’;

switch(x)

{case ‘A’<=x <=’C’ : printf (“%d\n”,
x);}

(C) x=’A’;

switch(x)

{

case ‘A’ : printf (“%d\n”, x);

break;

case ‘B’ : printf (“%d\n”, x);

break;

case ‘C’ : printf (“%d\n”, x);

break;

}

(D) x=’A’;

switch(x)

{

case ‘A’=printf (“%d\n”, x);

case ‘B’=printf (“%d\n”, x);

case ‘C’=printf (“%d\n”, x);

}

Answer: correct answer not given

14. Which
of the following is not true in C++ ?

(A) “Private” elements of a base class are
not accessible by members of its derived class.

(B) “Protected” elements of base class are
not accessible by members of its derived class.

(C) When
base class access
specified is “Public”,
public elements of
the base class become public members of its derived class.

(D) When base class access specified is “Public”,
protected elements of a base class become protected members of its derived
class.

Answer: B

15. Which
of the following is true of constructor function in C++ ?

(A) A class must have at least one
constructor.

(B) A constructor is a unique function which
cannot be overloaded.

(C) A constructor function must be invoked
with the object name.

(D) A constructor function is automatically
invoked when an object is created.

Answer: D

16. A
primary key for an entity is:

(A) a candidate key (B) any
attribute

(C) a unique attribute (D) a super key

Answer: C

17. Aggregate
functions in SQL are:

(A) GREATEST, LEAST and ABS

(B) SUM, COUNT and AVG

(C) UPPER, LOWER and LENGTH

(D) SQRT, POWER and MOD

18. If
a relation is in 2NF and 3NF forms then:

(A) no non-prime attribute is functionally
dependent on other non-prime attributes

(C) all attributes are functionally
independent

(D) prime attribute is functionally
independent of all non-prime attributes

Answer: A

19. The
end of an SQL command is denoted by:

(A) an
end-of-line character

(B) an ‘enter-key’ marker

(C) entering F4 key

(D) a semicolon (;)

Answer: D

20. Consider the
query : SELECT
student_name FROM students
WHERE class_name=(SELECT
class_name FROM students
WHERE math_marks=100); what will
be the output ?

(A) the list of names of students with 100
marks in mathematics

(B) the
names of all
students of all
classes in which
at least one
student has 100 marks in
mathematics

(C) the names of all students in all classes
having 100 marks in mathematics

(D) the names and class of all students whose
marks in mathematics is 100

**Part 1**

**Part 2**

question number 6. the right answer is option c by shemalatha from madurai

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