Top Java aptitude test question or Top Java programming aptitude interview questions. Below you see top aptitude question which is asked in a company during Java interview.
1)What is the output of the following Java programming?
A- 1
B- 2
C- 1 and 2 Both
D- Compile-time Error
OUTPUT:
2)What is the output of the following Java programming?
A- AAACCC
B- AAADDD
C- BBBCCC
D- BBBDDD
OUTPUT:
3)What is the output of the following Java programming?
A- 3 2 1
B- 2 3 1
C- Compile Time Fail
D- 1 2 3
OUTPUT:
Java programming interview questions |
1)What is the output of the following Java programming?
class A { int num1; void show() { System.out.println(num1); } } class B extends A { int num2; void show() { System.out.println(num2); } } public class Test { public static void main(String[] args) { B objB = new B(); objB.num1=1; objB.num2=2; objB.show(); } }
A- 1
B- 2
C- 1 and 2 Both
D- Compile-time Error
OUTPUT:
2)What is the output of the following Java programming?
public class Test { public static void main(String[] args) { String s = "hello"; Object o = (Object) s; if (s.equals(o)) { System.out.print("AAA"); } else { System.out.print("BBB"); } if (o.equals(s)) { System.out.print("CCC"); } else { System.out.print("DDD"); } } }
A- AAACCC
B- AAADDD
C- BBBCCC
D- BBBDDD
OUTPUT:
3)What is the output of the following Java programming?
import java.util.Arrays; import java.util.Comparator; class Sort implements Comparator<Integer> { @Override public int compare(Integer o1, Integer o2) { return o1.compareTo(o2); } } public class Test { public static void main(String[] args) { Integer intArray[] = {2,3,1}; Arrays.sort(intArray,new Sort()); for (int integer : intArray) { System.out.print(integer+" "); } } }
A- 3 2 1
B- 2 3 1
C- Compile Time Fail
D- 1 2 3
OUTPUT:
4) What is the output of the following Java programming?
public class Test { public static void show() { String s1 = "hello6"; String s2 = "hello" + "6"; System.out.print(s1 == s2); } public static void display() { String s1 = "hello6"; String s2 = "hello" + s1.length(); System.out.print(s1 == s2); } public static void main(String[] args) { show(); display(); } }
A- True True
B- True False
C- False True
D- False False
OUTPUT:
5) What is the output of the following Java programming?
public class Test { public static void main(String[] args) { try { System.out.print("Hello" + " " + 1 / 0); } catch (ArithmeticException e) { System.out.print("World"); } } }
A- Hello
B- World
C- Hello World
D- HelloWorld
OUTPUT:
6) What is the output of the following Java programming?
public class Test { public static void main(String[] args) { try { System.out.print("Hello" + " " + 0 / 1); } catch (ArithmeticException e) { e.printStackTrace(); } } }
A- java.lang.ArithmeticException: / by zero
B- Hello
C- Hello 0
D- Compile-Time Error
OUTPUT:
7) What is the output of the following Java programming?
public class JavaProgram { private int num,num2; public JavaProgram(int num,int num2) { num=num; num2=num2; } public static void main(String[] args) { JavaProgram jp=new JavaProgram(); System.out.println(jp.num+" "+jp.num2); } }
A- 0 0
B- num1 and num2 cannot be resolved
C- Runtime-Error
D- Compile-Time Error
OUTPUT:
8) What is the output of the following Java programming?
public class JavaProgram { int num = 20; void next(JavaProgram jp) { jp.num = 40; jp = new JavaProgram(); jp.num = 60; jp = null; } public static void main(String[] args) { JavaProgram jp = new JavaProgram(); jp.next(jp); System.out.println(jp.num); } }
A- 40
B- 60
C- 20
D- Compile-Time Error
OUTPUT:
9) What is the output of the following Java programming?
public class JavaProgram { public static void main(String[] args) { int num = 1; while (num < 10) { System.out.print(num + " "); if (num == 5) { break; } ++num; return; } } }
A- 1 2 3 4 5 6 7 8 9
B- 1 2 3 4 5
C- 1
D- Compile-Time Error
OUTPUT:
10) What is the output of the following Java programming?
class test { static { System.out.print("I am static block of Test "); } } public class JavaProgram { test t = new test(); public static void main(String[] args) { System.out.print("Hello I am Main Method "); } static { System.out.print("I am static block of JavaProgram "); } }
A- I am static block of the test, I am static block of JavaProgram, Hello I am Main Method
B- I am static block of JavaProgram, Hello I am Main Method, I am static block of test
C- Hello I am Main Method, I am static block of JavaProgram
D- I am static block of JavaProgram, Hello I am Main Method
OUTPUT:
11) What is the output of the following Java programming?
class test extends Exception { } class test2 extends test { } public class JavaProgram { public static void main(String[] args) { try { throw new test2(); }catch (test e) { System.out.print("Exception of Test "); } catch (Exception e) { System.out.print("Main Exception"); } } }
A- Exception of Test, Main Exception
B- Exception of Test
C-Code Compile Fails
D- Main Exception
OUTPUT:
12) What is the output of the following Java programming?
public class JavaProgram { public int show() { try { int i = 5 / 0; } catch (Exception e) { return 2; } finally { return 3; } } public static void main(String[] args) { JavaProgram jp = new JavaProgram(); System.out.print(jp.show()); } }
A- java.lang.ArithmeticException: / by zero
B- return 2
C- return 3
D- java.lang.ArithmeticException: / by zero and return 3
OUTPUT:
13) What is the output of the following Java programming?
public class JavaProgram { static void test1(String str1, String str2) { str1 += "0"; str2 += "0"; } static String test2() { String str1 = "30", str2 = "30"; test1( str1, str2); return str1 + str2; } public static void main(String[] args) { System.out.println(new JavaProgram().test2()); } }
A- 00
B- 0
C- 60
D- 3030
OUTPUT:
14) What is the output of the following Java programming?
import java.util.HashSet; import java.util.Set; public class JavaProgram { public static void main(String[] args) { boolean bool[] = new boolean[4]; Set set = new HashSet<>(); bool[0] = set.add("One"); bool[1] = set.add(new Double(10.2)); bool[2] = set.add(20); bool[3] = set.add(null); for (boolean b : bool) { System.out.print(b + " "); } } }
A- true true true true
B- Compile Fails
C- One 10.2 20 null
D- Runtime Exception
OUTPUT:
15) What is the output of the following Java programming?
import java.util.Iterator; import java.util.List; import java.util.concurrent.CopyOnWriteArrayList; public class JavaProgram { public static void main(String[] args) { List<Object> arrayList = new CopyOnWriteArrayList<>(); arrayList.add("One"); arrayList.add(null); arrayList.add(20); Iterator<Object> iterator = arrayList.iterator(); while (iterator.hasNext()) { arrayList.add("Bye"); } System.out.println("ArrayList Size: " + arrayList.size()); } }
A- ArrayList Size: 6
B- ConcurrentModificationException
C- ArrayList Size: 3
D-Infinite loop
OUTPUT:
I hope you enjoy this Code, do comment aptitude questions which you know!
good Question
ReplyDeleteWhat is the output of this
ReplyDeleteprogram?
class output {
public static void
main(String args[])
{
String s1 = "Hello";
String s2 = new String(s1);
String s3 = "HELLO";.
System.out.println(s1.equals(s2) +" " + s2.equals(s3));
True False
DeleteWhat is the output of this
ReplyDeleteprogram?
class output {
public static voidmain(String args[])
{
String chars[] = {"a","b", "c", "a", "c"};
for (int i = 0; i <chars.length; ++i)
for (int j = i + 1; j <chars.length; ++j)
if(chars[i].compareTo(chars[j]) ==0)
System.out.print(chars[j]);
ac
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