OOPS Fundamentals

Quiz

•

Computers

•

University

•

Practice Problem

•

Hard

Dr Sridevi

Used 12+ times

FREE Resource

10 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

public class Null {
public static boolean greet() {
System.out.print("Program execute = ");
return true;
}
public static void main(String[] args) {
System.out.println(Null.greet());
}
}

Program execute = true

Program execute = false

Program execute = null

Compilation Error

MULTIPLE CHOICE QUESTION

1 min • 1 pt

1. class Test1 {
public static void main(String[] args)
{
int x = 20;
System.out.println(x);
}
static
{
int x = 10;
System.out.print(x + " ");
}
}

20 10

10 20

10 10

20 20

MULTIPLE CHOICE QUESTION

1 min • 1 pt

class Test1 {
int x = 10;
public
static void main(String[] args)
{
System.out.println(x);
}
static
{
System.out.print(x + " ");
}
}

20 10

0 10

error

10 10

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

class SamsungMobile
{
public static void main(String[] args)
{
Simple.getData();
Simple.display();
}
}
class Simple
{
static int a, b = 20;
static void getData()
{
System.out.println("a = " + a);
}
static void display()
{
System.out.println("b = " + b);
}
static
{
System.out.println("Samsung Mobile");
**a = 4 * b;**
}
}

Samsung Mobile

a = 80

b = 20

Samsung Mobile

a = 0

b = 20

Samsung Mobile

a = 20

b = 0

Compilation Error

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What will be the output of the following program?

public class Final
{
final int assign = 30;

public static void main(String[] args)
{
final int result = 20;
final int assign;

Final f = new Final();
assign = 20;

System.out.println(assign);
System.out.println(f.assign);
System.out.println(f.process(result));
}

int process(int a)
{
return a + 5;
}
}

Error

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

class Output
{
final static short i = 2;
public static int j = 0;

public static void main(String [] args)
{
for (int k = 0; k < 3; k++)
{
switch (k)
{
case i: System.out.print(" 0 ");
case i-1: System.out.print(" 1 ");
case i-2: System.out.print(" 2 ");
}
}
}
}

2 1 0 1 0 0

0 1 2 1 2 2

2 1 2 0 1 2

0 1 2

error

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following classes fail to compile?
class X { }
abstract class Y { }
class Z { abstract void method(); }

All classes compile

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OOPS Fundamentals

10 questions

public class Null {
public static boolean greet() {
System.out.print("Program execute = ");
return true;
}
public static void main(String[] args) {
System.out.println(Null.greet());
}
}

1. class Test1 {
public static void main(String[] args)
{
int x = 20;
System.out.println(x);
}
static
{
int x = 10;
System.out.print(x + " ");
}
}

class Test1 {
int x = 10;
public
static void main(String[] args)
{
System.out.println(x);
}
static
{
System.out.print(x + " ");
}
}

class Output
{
final static short i = 2;
public static int j = 0;

public static void main(String [] args)
{
for (int k = 0; k < 3; k++)
{
switch (k)
{
case i: System.out.print(" 0 ");
case i-1: System.out.print(" 1 ");
case i-2: System.out.print(" 2 ");
}
}
}
}

Which of the following classes fail to compile?
class X { }
abstract class Y { }
class Z { abstract void method(); }

What will be the output of the following Java program?
class A
{
int i;
}
class B extends A
{
int j;
void display()
{
super.i = j + 1;
System.out.println(j + " " + i);
}
}
class inheritance
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}

Which of these is correct way of inheriting class A by class B?

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Discover more resources for Computers

OOPS Fundamentals

10 questions

public class Null { public static boolean greet() { System.out.print("Program execute = "); return true; } public static void main(String[] args) { System.out.println(Null.greet()); } }

1. class Test1 { public static void main(String[] args) { int x = 20; System.out.println(x); } static { int x = 10; System.out.print(x + " "); } }

class Test1 { int x = 10; public static void main(String[] args) { System.out.println(x); } static { System.out.print(x + " "); } }

class Output { final static short i = 2; public static int j = 0; public static void main(String [] args) { for (int k = 0; k < 3; k++) { switch (k) { case i: System.out.print(" 0 "); case i-1: System.out.print(" 1 "); case i-2: System.out.print(" 2 "); } }}}

Which of the following classes fail to compile?class X { } abstract class Y { } class Z { abstract void method(); }

What will be the output of the following Java program? class A { int i; } class B extends A { int j; void display() { super.i = j + 1; System.out.println(j + " " + i); } } class inheritance { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } }

Which of these is correct way of inheriting class A by class B?

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public class Null {
public static boolean greet() {
System.out.print("Program execute = ");
return true;
}
public static void main(String[] args) {
System.out.println(Null.greet());
}
}

1. class Test1 {
public static void main(String[] args)
{
int x = 20;
System.out.println(x);
}
static
{
int x = 10;
System.out.print(x + " ");
}
}

class Test1 {
int x = 10;
public
static void main(String[] args)
{
System.out.println(x);
}
static
{
System.out.print(x + " ");
}
}

class Output
{
final static short i = 2;
public static int j = 0;

public static void main(String [] args)
{
for (int k = 0; k < 3; k++)
{
switch (k)
{
case i: System.out.print(" 0 ");
case i-1: System.out.print(" 1 ");
case i-2: System.out.print(" 2 ");
}
}
}
}

Which of the following classes fail to compile?
class X { }
abstract class Y { }
class Z { abstract void method(); }

What will be the output of the following Java program?
class A
{
int i;
}
class B extends A
{
int j;
void display()
{
super.i = j + 1;
System.out.println(j + " " + i);
}
}
class inheritance
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}