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Oracle Java Programming Certification Questions and Answers (Dumps and Practice Questions)



Question : You have been given following three classes as below.'

A.java

public class A {
public void a(){}
int a;
}

B.java

public class A {
public void a(){}
int a;
}

C.java
import java.io.*;
package p1;

class A {
public void main(String filename) throws IOException {}
}

Which of the follwing statement is true, with regards to above code.

: You have been given following three classes as below.'
1. Only the A.Java file compiles successfully.
2. Only the B.java file compiles successfully
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4. The A.Java and B.java files compile successfully
5. The B.java and C.java files compile successfully.


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Question : Given the code fragment:
int[] array = {I, 2, 3, 4, 5};

And given the requirements:
1. Process all the elements of the array in the order of entry.
2. Process all the elements of the array in the reverse order of entry.
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Which two statements are true?

A. Requirements 1, 2, and 3 can be implemented by using the enhanced for loop.
B. Requirements 1, 2, and 3 can be implemented by using the standard for loop.
C. Requirements 2 and 3 CANNOT be implemented by using the standard for loop.
D. Requirement 1 can be implemented by using the enhanced for loop.
E. Requirement 3 CANNOT be implemented by using either the enhanced for loop or the standard for loop.

: Given the code fragment:
1. B,D
2. A,E
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4. C,E



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Question : You have been given below java Application code, when you execute it. What would be printed.

public class CalculationApp {
public static void main(String[] args) {
int var1 =200;
System.out.print(doCalc(var1));
System.out.println(" "+ var1);
}

static int doCalc(int var1){
var1= var1*2;
return var1;

}
}

: You have been given below java Application code, when you execute it. What would be printed.
1. 400 200
2. 200 200
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4. Compilation fails.



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Related Questions

Question : You have been given following code

public class MyFor {
public static void main(String[] args) {
for (int ii = 0; ii < 4; ii++) {
System.out.println("ii = " + ii);
ii = ii + 1;
}
}
}

What is the result?

 : You have been given following code
1. ii = 0 ii = 2
2. ii = 0 ii = 1ii = 2 ii = 3
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4. Compilation fails.




Question : Given the code fragment:
System.out.printIn("Result: " + 2 + 3 + 5);
System.out.printIn("Result: " + 2 + 3 * 5);
What is the result?

 : Given the code fragment:
1. Result: 10 Result: 30
2. Result: 10 Result: 25
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4. Result: 215 Result: 215

5. Compilation fails




Question : You have been given following code

public class Student {
public String name = "";
public int age = 0;
public String major = "Undeclared";
public boolean fulltime = true;

public void display() {
System.out.println("Name: " + name + " Major: " + major);
}

public boolean isFullTime() {
return fulltime;
}
}


public class TestStudent {
public static void main(String[] args) {
Student bob = new Student();
bob.name = "Bob";
bob.age = 18;
bob.year = 1982;
}
}

What is the result?

 : You have been given following code
1. year is set to 1982.
2. bob.year is set to 1982
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4. A compile time error is generated.




Question : You have been given following code

public class MyClass {
public static void main(String[] args) {
while(int ii = 0; ii < 2) {
ii++;
System.out.println("ii = " + ii);
}
}
}

What would be result ?


 : You have been given following code
1. ii = 1 ii = 2
2. Compilation fails
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4. The program goes into an infinite loop with no output
5. The program goes to an infinite loop outputting: ii = 1 ii = 1




Question : You have been given following

class Base {
public static void main(String[] args) {
System.out.println("Base " + args[2]);
}
}

public class Sub extends Base {
public static void main(String[] args) {
System.out.println("Overriden " + args[1]);
}
}

 : You have been given following
1. Base 30
2. Overridden 20
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4. Base 30 Overridden 20




Question : You have been given following code

public class ScopeTest {
int j;
int k;

public static void main(String[] args) {
new ScopeTest().doStuff();
}

void doStuff() {
int x = 5;
doStuff2();
System.out.println("x");
}

void doStuff2() {
int y = 7;
System.out.println("y");
for (int z = 0; z < 5; z++) {
System.out.println("z");
System.out.println("y");
}
}
}

Which two items are fields?

A. j
B. k
C. x
D. y
E. z


 : You have been given following code
1. A,B
2. B,C
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4. A,B,C