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Q41. Given the code fragment:
for (int ii = 0; ii < 3;ii++) {
int count = 0;
for (int jj = 3; jj > 0; jj--) {
if (ii == jj) {
++count;
break;
}
}
System.out.print(count); continue; }
What is the result?
A. 011
B. 012
C. 123
D. 000
Answer: A
Q42. Given:
public class Test1 {
static void doubling (Integer ref, int pv) {
ref =20;
pv = 20;
}
public static void main(String[] args) {
Integer iObj = new Integer(10);
int iVar = 10;
doubling(iObj++, iVar++);
System.out.println(iObj+ ", "+iVar);
What is the result?
A. 11, 11
B. 10, 10
C. 21, 11
D. 20, 20
E. 11, 12
Answer: A
Explanation: The code doubling(iObj++, iVar++); increases both variables from to 10 to
11.
Q43. Given the code fragment:
Which three lines fail to compile?
A. Line 7
B. Line 8
C. Line 9
D. Line 10
E. Line 11
F. Line 12
Answer: A,D,F
Q44. Which three statements describe the object-oriented features of the Java language?
A. Objects cannot be reused.
B. A subclass can inherit from a superclass.
C. Objects can share behaviors with other objects.
D. A package must contain more than one class.
E. Object is the root class of all other objects.
F. A main method must be declared in every class.
Answer: B,C,E
Q45. Given:
What is the result?
A. 3 4 5 6
B. 3 4 3 6
C. 5 4 5 6
D. 3 6 4 6
Answer: C
Q46. Given the code fragment:
Which option can replace xxx to enable the code to print 135?
A. int e = 0; e < = 4; e++
B. int e = 0; e < 5; e + = 2
C. int e = 1; e < = 5; e + = 1
D. int e = 1; e < 5; e+ =2
Answer: B
Q47. Consider
Integer number = Integer.valueOff 808.1");
Which is true about the above statement?
A. The value of the variable number will be 808.1
B. The value of the variable number will be 808
C. The value of the variable number will be 0.
D. A NumberFormatException will be throw.
E. It will not compile.
Answer: D
Explanation:
The Integer class value of 0 returns an Integer from given string. But we need to pass string which has correct format for integer otherwise it will throw a NumberFormatException. In this case we have passed string which is not an integer value (since what we passed is fractional number), so option D is correct.
Q48. Given:
class Sports {
int num_players;
String name, ground_condition;
Sports(int np, String sname, String sground){
num_players = np;
name = sname;
ground_condition = sground;
}
}
class Cricket extends Sports {
int num_umpires;
int num_substitutes;
Which code fragment can be inserted at line //insert code here to enable the code to compile?
A. Cricket() {
super(11, "Cricket", "Condidtion OK");
num_umpires =3;
num_substitutes=2;
}
B. Cricket() {
super.ground_condition = "Condition OK";
super.name="Cricket";
super.num_players = 11;
num_umpires =3;
num_substitutes=2;
}
C. Cricket() {
this(3,2);
super(11, "Cricket", "Condidtion OK");
}
Cricket(int nu, ns) {
this.num_umpires =nu;
this.num_substitutes=ns;
}
D. Cricket() {
this.num_umpires =3;
this.num_substitutes=2;
super(11, "Cricket", "Condidtion OK");
}
Answer: A
Explanation:
Incorrect:
not C, not D: call to super must be the first statement in constructor.
Q49. Give:
What is the result?
A. 1525
B. 13
C. Compilation fails
D. An exception is thrown at runtime
E. The program fails to execute due to runtime error
Answer: D
Q50. Which of the following can fill in the blank in this code to make it compile? (Select 2 options.)
A. On line 1, fill in throws
B. On line 1, fill in throws new
C. On line 2, fill in throw new
D. On line 2, fill in throws
E. On line 2, fill in throws new
Answer: A,C
Explanation:
Option A and C are the correct answer.
In a method declaration, the keyword throws is used. So here at line 1 we have to use
option A.
To actually throw an exception, the keyword throw is used and a new exception is created,
so at line 2 we have to use throw and new keywords, which is option C. Finally it will look
like;
public void method() throws Exception {
throw new Exception0;
}
REFERENCE : httpsy/docs.oracle.com/javase/tutorial/essential/io/fileOps.html#exception
The correct answer is: On line 1, fill in throws. On line 2, fill in throw new