Diagnostic Test G12

1. Which of the following variable declarations will result in an error?

• A. int a =10.0;

• B. double y = 100;

• C. int x = 100;

• D. double a, b=20.0;

• E. String name= “AHMED”;

2. What is the output of the code segment given below?

int X=10;

int Y=20;

int Z=10;

int result = X + (Y + Z ) / 3;

System.out.print (" The average is: " + result);

• A.The average is: 33

• B.The average is: 13

• C.The average is: 20

• D.The average is: + result

• E. The average is: + 40

3. Which of the following is an assignment operator?

• ==

• !=

• =

• >

• >=

4. What is the result of the following expression knowing that int X = 1 and double Y = 2.0?

100 / ((X + 4) * Y)

• 0

• 4

• 10

• 10.0

• 25

5. Which of the below Java keywords is used to define a constant?

• A. static

• B.class

• C.final

• D.main

• E.public

6. Given a=10, b=5, c=0. Which of the following expressions will evaluate to false?

• A.(a>=10 && b!=c )

• B. ((a<b) || (a<c))

• C. (!(a<c) || (b > 10))

• D. ((a==b) || (c <b))

• E. ((a>b) && (a>c))

Refer to the code below to answer question 6.

public static void main(String args[ ])

{

int count = 1;

while ( ………………………. ) //Line 4

{

System.out.print(count + " " );

count = count + 5;

} }

Which of the below condition(s) can be used in the space provided in Line 4, to get the following output?

1 6 11 16

I. count <= 20

II. count <= 19

III. count <20

• A. I only

• B. II only

• C. III only

• D. I and II only

• E. I, II and III

8. What is the output of the code segment given below?

for (int n = 1; n <=5; n++ )

System.out.print (n + " ");

• A. 1 2 3 4

• B. 1 2 3 4 5

• C. 1 2 3 4 5 6

• D.n n n n n

• E.n n n n n n

9. What do we call the activities associated with an object in a Java program?

• A. Object’s behavior

• B. Object’s class

• C. Object’s state

• D. Object’s variable

• E. Object’s name

10. What is the output of the code given below?

public static void main(String args[ ])

{

int z = 3;

int y = 0;

while (y < 3)

{

z += 1;

y += 1;

}

z++;

System.out.println (z);

}

• A. 0

• B. 3

• C. 4

• D. 6

• E. 7