Java Programming - Quiz 1

Given the following,

1. public class Test {

2. public static void main(String [] args) {

3. signed int x = 10;

4. for (int y=0; y<5; y++, x--)

5. System.out.print(" " + x);

6. }

7. }

what is the result? (Choose one.)

• 10 9 8 7 6

• 9 8 7 6 5

• Compilation fails

• An exception is thrown at runtime

Which one of these lists contains only Java programming language keywords? (Choose one.)

• class, if, void, long, Int, continue

• goto, instanceof, native, finally, default, throws

• try, virtual, throw, final, volatile, transient

• strictfp, constant, super, implements, do

• byte, break, assert, switch, include

What is the numerical range of a char? (Choose one.)

• –128 to 127

• –(2 ^ 15) to (2 ^ 15) - 1

• 0 to 32767

• Platform dependent

• 0 to 65535

Which three are valid declarations of a float? (Choose three.)

• float f1 = -343;

• float f2 = 3.14;

• float f3 = 0x12345;

• float f6 = 2.81F;

• float f5 = 2001.0D;

Which two demonstrate encapsulation of data? (Choose Two)

• Member data have no access modifiers.

• Member data can be modified directly.

• The access modifier for methods is protected.

• The access modifier to member data is private.

• Methods provide for access and modification of data.

Which two valid declarations of a char? (Choose Two)

• char ch = “a”;

• char ch = ‘\’ ‘;

• char ch = ‘cafe’;

• char ch = ‘\ucafe’;

• char ch = (char) true;

Given:

1. public class returnIt (

2. returnType methodA(byte x, double y) (

3. return (short) x/y * 2;

4. )

5. )

What is the valid returnType for methodA in line 2 ?

• int

• double

• long

• short

• float

class Main {

public static void main(String args[]) {

int t;

System.out.println(t);

}

}

• 0

• garbage value

• compiler error

• runtime error

class Test {

public static void main(String[] args) {

for(int i = 0; 0; i++)

{

System.out.println("Hello");

break;

}

}

}

• Hello

• Empty Output

• Compiler error

• Runtime error

• None of the mentioned

class Test {

public static void main(String args[]) {

System.out.println(10 + 20 + "GeeksQuiz");

System.out.println("GeeksQuiz" + 10 + 20);

}

}

• 30GeeksQuiz

  GeeksQuiz30

• 1020GeeksQuiz

  GeeksQuiz1020

• 30GeeksQuiz

  GeeksQuiz1020

• 1020GeeksQuiz

  GeeksQuiz30