QUESTION NO: 1
Given:
import java.util.*;
public class Ref {
public static void main(String[] args) {
StringBuilder s1 = new StringBuilder("Hello Java!");
String s2 = s1.toString();
List<String> lst = new ArrayList<String>();
lst.add(s2);
System.out.println(s1.getClass());
System.out.println(s2.getClass());
System.out.println(lst.getClass());
}
}
Given:
import java.util.*;
public class Ref {
public static void main(String[] args) {
StringBuilder s1 = new StringBuilder("Hello Java!");
String s2 = s1.toString();
List<String> lst = new ArrayList<String>();
lst.add(s2);
System.out.println(s1.getClass());
System.out.println(s2.getClass());
System.out.println(lst.getClass());
}
}
Correct Answer: A
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QUESTION NO: 3
class Student {
int rollnumber;
String name;
List cources = new ArrayList();
// insert code here
public String toString() {
return rollnumber + " : " + name + " : " + cources;
} }
And,
public class Test { public static void main(String[] args) {
List cs = newArrayList();
cs.add("Java");
cs.add("C");
Student s = new Student(123,"Fred", cs);
System.out.println(s);
}
}
class Student {
int rollnumber;
String name;
List cources = new ArrayList();
// insert code here
public String toString() {
return rollnumber + " : " + name + " : " + cources;
} }
And,
public class Test { public static void main(String[] args) {
List cs = newArrayList();
cs.add("Java");
cs.add("C");
Student s = new Student(123,"Fred", cs);
System.out.println(s);
}
}
Correct Answer: B
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QUESTION NO: 6
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;
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;
Correct Answer: C
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QUESTION NO: 7
System.out.printIn ("Result: " +3+5);
System.out.printIn ("Result: " + (3+5));
System.out.printIn ("Result: " +3+5);
System.out.printIn ("Result: " + (3+5));
Correct Answer: A
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QUESTION NO: 9
Given:
public class SampleClass {
public static void main(String[] args) {
AnotherSampleClass asc = new AnotherSampleClass(); SampleClass sc = new SampleClass();
sc = asc;
System.out.println("sc: " + sc.getClass());
System.out.println("asc: " + asc.getClass());
}}
class AnotherSampleClass extends SampleClass {
}
Given:
public class SampleClass {
public static void main(String[] args) {
AnotherSampleClass asc = new AnotherSampleClass(); SampleClass sc = new SampleClass();
sc = asc;
System.out.println("sc: " + sc.getClass());
System.out.println("asc: " + asc.getClass());
}}
class AnotherSampleClass extends SampleClass {
}
Correct Answer: A
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QUESTION NO: 12
public class ScopeTest {
int j, int k;
public static void main(String[] args) {
ew ScopeTest().doStuff(); }
void doStuff() {
nt x = 5;
oStuff2();
System.out.println("x");
}
void doStuff2() {
nt y = 7;
ystem.out.println("y");
or (int z = 0; z < 5; z++) {
ystem.out.println("z");
ystem.out.println("y");
}
public class ScopeTest {
int j, int k;
public static void main(String[] args) {
ew ScopeTest().doStuff(); }
void doStuff() {
nt x = 5;
oStuff2();
System.out.println("x");
}
void doStuff2() {
nt y = 7;
ystem.out.println("y");
or (int z = 0; z < 5; z++) {
ystem.out.println("z");
ystem.out.println("y");
}
Correct Answer: B,D
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QUESTION NO: 13
public class ForTest {
public static void main(String[] args) { int[] arrar = {1,2,3}; for ( foo ) { } } }
public class ForTest {
public static void main(String[] args) { int[] arrar = {1,2,3}; for ( foo ) { } } }
Correct Answer: A,B,D
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