Quiz 5- OOAD (JAVA)

Quiz

•

Computers

•

University

•

Practice Problem

•

Medium

Dr. Pal

Used 1+ times

FREE Resource

15 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the output of the following Java program?
class A {
A() {
System.out.print("A");
}
}
class B extends A {
B() {
System.out.print("B");
}
}
public class Test {
public static void main(String[] args) {
B obj = new B();
}
}

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the output of the following Java program?
class A {
void method() {
System.out.println("A");
}
}
class B extends A {
void method() {
System.out.println("B");
}
}
public class Test {
public static void main(String[] args) {
A obj1 = new B();
B obj2 = (B) obj1;
obj2.method();
}
}

Compilation Error

Runtime Error

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the output of the following Java program?
class A {
static void staticMethod() {
System.out.println("A Static");
}

void instanceMethod() {
System.out.println("A Instance");
}
}
class B extends A {
static void staticMethod() {
System.out.println("B Static");
}

void instanceMethod() {
System.out.println("B Instance");
}
}
public class Test {
public static void main(String[] args) {
A aObj = new B();
B bObj = (B) aObj;
aObj.staticMethod();
bObj.instanceMethod();
}
}

A Static
B Instance

B Static
B Instance

Compilation Error

Runtime Error

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the output of the following Java program?
interface MyInterface {
void myMethod();
}
class MyClass implements MyInterface {
public void myMethod() {
System.out.println("MyClass");
}
}
public class Test {
public static void main(String[] args) {
MyInterface obj = new MyClass() {
public void myMethod() {
System.out.println("Anonymous Inner Class");
}
};
obj.myMethod();
}
}

MyClass

MyInterface

Anonymous Inner Class

Compilation Error

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the output of the following Java program?
class A {
final void show() {
System.out.println("A");
}
}
class B extends A {
void show() {
System.out.println("B");
}
}
public class Test {
public static void main(String[] args) {
A obj = new B();
obj.show();
}
}

Compilation Error

Runtime Error

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
String s1 = "Hello";
String s2 = new String("Hello");
System.out.println(s1 == s2);
System.out.println(s1.equals(s2));
}
}

true

false

true

false

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
String s1 = "Hello";
String s2 = "World";
String result = s1 + s2;
System.out.println(result == "HelloWorld"); // false
}
}

true

false

Compilation error

Runtime error

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Quiz 5- OOAD (JAVA)

15 questions

What is the output of the following Java program?
class A {
A() {
System.out.print("A");
}
}
class B extends A {
B() {
System.out.print("B");
}
}
public class Test {
public static void main(String[] args) {
B obj = new B();
}
}

What is the output of the following Java program?
class A {
void method() {
System.out.println("A");
}
}
class B extends A {
void method() {
System.out.println("B");
}
}
public class Test {
public static void main(String[] args) {
A obj1 = new B();
B obj2 = (B) obj1;
obj2.method();
}
}

What is the output of the following Java program?
class A {
final void show() {
System.out.println("A");
}
}
class B extends A {
void show() {
System.out.println("B");
}
}
public class Test {
public static void main(String[] args) {
A obj = new B();
obj.show();
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
String s1 = "Hello";
String s2 = new String("Hello");
System.out.println(s1 == s2);
System.out.println(s1.equals(s2));
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
String s1 = "Hello";
String s2 = "World";
String result = s1 + s2;
System.out.println(result == "HelloWorld"); // false
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
int x = 5;
int y = 10;
for (int i = 0; i < 3; i++) {
x += y;
y = y - 1;
}
System.out.println(x + " " + y);
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
StringBuffer sb1 = new StringBuffer("Hello");
StringBuffer sb2 = sb1;
sb1.append(" World");
System.out.println(sb2.toString());
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
int x = 5;
int y = 10;
int result = (x > 5) ? (x + y) : (x - y);
System.out.println(result);
}
}

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Quiz 5- OOAD (JAVA)

15 questions

What is the output of the following Java program?class A { A() { System.out.print("A"); }}class B extends A { B() { System.out.print("B"); }}public class Test { public static void main(String[] args) { B obj = new B(); }}

What is the output of the following Java program?class A { void method() { System.out.println("A"); }}class B extends A { void method() { System.out.println("B"); }}public class Test { public static void main(String[] args) { A obj1 = new B(); B obj2 = (B) obj1; obj2.method(); }}

What is the output of the following Java program?class A { final void show() { System.out.println("A"); }}class B extends A { void show() { System.out.println("B"); }}public class Test { public static void main(String[] args) { A obj = new B(); obj.show(); }}

What is the output of the following Java program?public class Test { public static void main(String[] args) { String s1 = "Hello"; String s2 = new String("Hello"); System.out.println(s1 == s2); System.out.println(s1.equals(s2)); }}

What is the output of the following Java program?public class Test { public static void main(String[] args) { String s1 = "Hello"; String s2 = "World"; String result = s1 + s2; System.out.println(result == "HelloWorld"); // false }}

What is the output of the following Java program?public class Test { public static void main(String[] args) { int x = 5; int y = 10; for (int i = 0; i < 3; i++) { x += y; y = y - 1; } System.out.println(x + " " + y); }}

What is the output of the following Java program?public class Test { public static void main(String[] args) { StringBuffer sb1 = new StringBuffer("Hello"); StringBuffer sb2 = sb1; sb1.append(" World"); System.out.println(sb2.toString()); }}

What is the output of the following Java program?public class Test { public static void main(String[] args) { int x = 5; int y = 10; int result = (x > 5) ? (x + y) : (x - y); System.out.println(result); }}

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Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Computers

What is the output of the following Java program?
class A {
A() {
System.out.print("A");
}
}
class B extends A {
B() {
System.out.print("B");
}
}
public class Test {
public static void main(String[] args) {
B obj = new B();
}
}

What is the output of the following Java program?
class A {
void method() {
System.out.println("A");
}
}
class B extends A {
void method() {
System.out.println("B");
}
}
public class Test {
public static void main(String[] args) {
A obj1 = new B();
B obj2 = (B) obj1;
obj2.method();
}
}

What is the output of the following Java program?
class A {
final void show() {
System.out.println("A");
}
}
class B extends A {
void show() {
System.out.println("B");
}
}
public class Test {
public static void main(String[] args) {
A obj = new B();
obj.show();
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
String s1 = "Hello";
String s2 = new String("Hello");
System.out.println(s1 == s2);
System.out.println(s1.equals(s2));
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
String s1 = "Hello";
String s2 = "World";
String result = s1 + s2;
System.out.println(result == "HelloWorld"); // false
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
int x = 5;
int y = 10;
for (int i = 0; i < 3; i++) {
x += y;
y = y - 1;
}
System.out.println(x + " " + y);
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
StringBuffer sb1 = new StringBuffer("Hello");
StringBuffer sb2 = sb1;
sb1.append(" World");
System.out.println(sb2.toString());
}
}

What is the output of the following Java program?
public class Test {
public static void main(String[] args) {
int x = 5;
int y = 10;
int result = (x > 5) ? (x + y) : (x - y);
System.out.println(result);
}
}