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JAVA Skill Assessment Quiz 2022 | LinkedIn Skill Assessment Quiz | LinkedIn | MNC Answers

JAVA Skill Assessment Quiz 2022 | LinkedIn Skill Assessment Quiz | MNCAnswers
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All Question of the MCQs Present Below for Ease Use Ctrl + F with the question name to find the Answer. All the Best!

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  5. click on 'Take skill quiz'
  6. Search for your preferred courses/skills and take up the assessment

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Q1. What is displayed when this code is compiled and executed?
Public class main {
public static void main(string[] args) {
int x= 5;x = 10;System.out.println(x);
  }
}

  • 5
  • null
  • x
  • 10 – Correct answers

Q2. What statement returns true if “nifty” is of type String?

  • “nifty”.getType().equals(“string”)
  • “nifty”.getClass().getSimpleName() == “String”
  • “nifty” instantceof String – Correct Answer
  • “nifty” .getType() == String

Q3. Given the string “strawberries” saved in a variable called fruit, what would fruit .substring(2, 5) return?

  • raw – Correct Answer
  • rawb
  • traw
  • awb

Q4. What is the result of this code?
try{  System.out.print(“Hello World”);}catch(Exception e) {  System.out.println(“e”);}catch(ArithmeticException e) { System.out.println(“e”);}finalyy{ System.out.println(“!”);}

  • It will not compile because the second catch statement is unreachable. – Correct Answer
  • Hello World
  • Hellow World!
  • It will thwow a runtime exception.

Q5. How many times will this code print “Hello World”?
class Main{ public static void main(String[] args) {
   for (int i=0; i<10; i=i++){    i+=1;    System.out.println(“Hello World!”);   }  }}

  • 9 times
  • infinite number of times
  • 5 times
  • 10 times – Correct Answer

Q6. What is the result of this code?
class Main { Object message(){ return “Hello!”;
 } public static void main(String[] args) { System.out.print(new main().MESSAGE()); System.out.print(new Main2().message()); }}class Main2 extends Main { String message(){ return “World!”;  }}

  • It will compile because of line 7.
  • Hello!Hello!
  • Hello!World! – Correct Answers
  • It will not compile because of line 11.

Q7. You have an ArrayList of names that you want to sort alphabetically. Which approach would not work?

  • names.sort(Comparator.comparing(String::toString))
  • names = names.stream().sorted((s1, s2) ->

          s1.compareTo(s2)).collect(Collectors.toList())

  • names.sort(List.DECENDING) – Correct Answer
  • Collections.sort(names)

Q8. What is the output of this code?
import java.util.*;class Main {  public static void main(String[] args) {  List<Boolean> list = new ArrayList<>();  list.add(true);  list.add(Boolean.parseBoolean(“False”));  list.add(Boolean.TRUE);  System.out.print(list.size());  System.out.print(list.get(1) instanceof Boolean);  }}

  • 3false
  • 3true 
  • 2true
  • A runtime exception is thrown -Correct Answer

Q9. What method can be used to create a new instance of an object?

  • another instance
  • field
  • private method
  • constructor – Correct Answer

Q10. How can you achieve runtime polymorphism in Java?

  • method calling
  • method overrunning
  • method overriding
  • method overloading – Correct Answer

Q11. What is the output of this code?
class Main { public static void main(String[] args) { String message = “Hello wold!”; String newMessage = message.substring(6, 12) + message.substring(12, 6); System.out.println(newMessage); }}

  • The code does not compile 
  • A runtime exception is thrown. – Correct Answer
  • world!world!
  • world!!world

Q12. Which is the most reliable expression for testing whether the values of two string variables are the same?

  • string1 == string2
  • string1.equals(string2) – Correct Answer
  • string1 = string2
  • string1.matches(string2)

Q13. What is the output of this code?
class Main {
  static int cound = 0;
  public static void main(String[] args)  {
if(cound <3)
{count++;main(null);}
else{  return;
   }   System.out.println(“Hello World”);
  }
}

  • it will throw a runtime exception.
  • it will print “Hello World!” three times.
  • it will not compile.
  • it will run forever. – Correct Answer

Q14. What is the output of this code?
class main {
  public static void main(String[] args) {
   List list = new ArrayList();   list.add(“hello”);
   list.add(2);
   System.out.print(list.get(0) instanceof Object);   System.out.print(list.get(1) instanceof Integer);
  }
}

  • falsetrue
  • The code does not compile.
  • truetrue – Correct Answer
  • truefalse

Q15. By implementing encapsulation, you cannot directly access the class’s_____properties unless you are writing code inside the class itself.

  • private – Correct Answer
  • protected
  • public
  • no-modifier

Linkedin Java Assessment Questions and Answers Old

Q1. Given the string “strawberries” saved in a variable called fruit, what would “fruit.substring(2, 5)” return?

  • rawb
  • raw <<<<—Correct
  • awb
  • traw

Q2. How can you achieve runtime polymorphism in Java?

  • method overloading
  • method overrunning
  • method overriding <<<<— Correct
  • method calling

Q3. Given the following definitions, which of these expressions will NOT evaluate to true?
boolean b1 = true, b2 = false;
int i1 = 1, i2 = 2;

  • (i1 | i2) == 3
  • i2 && b1 <<<<—Correct
  • b1 || !b2
  • (i1 ^ i2) < 4

Q4. What can you use to create new instances in Java?

  • constructor <<<<—Correct
  • another instance
  • field
  • private method

Q5. What is the output of this code?
class Main {
 public static void main (String[] args) {
     int array[] = {1, 2, 3, 4};
     for (int i = 0; i < array.size(); i++) {
        System.out.print(array[i]);
       }
     }
   }

  • It will not compile because of line 4. <<<<—Correct
  • It will not compile because of line 3.
  • 123
  • 1234

Q6. Which of the following can replace the CODE SNIPPET to make the code below print “Hello World”?
interface Interface2 {
    static void print() {
        System.out.print(“World!”);
    }
}

  • super1.print(); super2.print();
  • this.print();
  • super.print();
  • Interface1.print(); Interface2.print();

Q7. What does the following code print?String str = “”abcde””;str.trim();str.toUpperCase();str.substring(3, 4);System.out.println(str);

  • CD
  • CDE
  • D
  • “abcde” <<<<—Correct

Q8. What is the result of this code?
class Main {
   public static void main (String[] args){
     System.out.println(print(1));
   }
   static Exception print(int i){
       if (i>0) {
          return new Exception();
       }
else {
          throw new RuntimeException();
      }
  }
}

  • It will show a stack trace with a runtime exception.
  • “java.lang.Exception” <<<<—Correct
  • It will run and throw an exception.
  • It will not compile.

Q9. Which class can compile given these declarations?
interface One {
      default void method() {
        System.out.println(“”One””);
      }   }
interface Two {
      default void method () {
        System.out.println(“”One””);
    }
   } 

  •  class Three implements One, Two {

    publc void method() {        super.One.method();  } }

  •   class Three implements One, Two {

    publc void method() {        One.method();  } }

  • class Three implements One, Two {

}

  •   class Three implements One, Two { <—— correct

    publc void method() {        One.super.method();  } }

Q10. What is the output of this code?
class Main {
  public static void main (String[] args) {
      List list = new ArrayList();
      list.add(“hello”);
      list.add(2);
    System.out.print(list.get(0) instanceof Object);
      System.out.print(list.get(1) instanceof Integer);
  }
}

  • The code does not compile.
  • truefalse
  • truetrue <<<<—Correct
  • falsetrue

Q11. Given the following two classes, what will be the output of the Main class?
package mypackage;
public class Math {
    public static int abs(int num){
        return num<0?-num:num;
    }
}
package mypackage.elementary;
public class Math {
    public static int abs (int num) {
        return -num;
    }
}
import mypackage.Math;
import mypackage.elementary.*;
class Main {
  public static void main (String args[]){
    System.out.println(Math.abs(123));
  }
}

  • Lines 1 and 2 generate compiler erros due to class name conflicts.
  • “-123”
  • It will throw an exception on line 5.
  • “123” <— Correct // The answer is “123”. The abs() method evaluates to the one inside mypackage.Math class.

Q12. What is the result of this code?
class MainClass {
  final String message(){
      return “Hello!”;
  }
}
class Main extends MainClass {
  public static void main(String[] args) {
      System.out.println(message());
  }
String message(){
     return “World!”;
  }
}

  • It will not compile because of line 10. <— Correct
  • “Hello!”
  • It will not compile because of line 2.
  • “World!”

Q13. Given this code, which command will output “2”?
class Main {
    public static void main(String[] args) {
        System.out.println(args[2]);
    }
}

  • java Main 1 2 “3 4” 5
  • java Main 1 “2” “2” 5 <— Correct
  • java Main.class 1 “2” 2 5
  • java Main 1 “2” “3 4” 5

Q14. What is the output of this code?
class Main {    public static void main(String[] args){        int a = 123451234512345;        System.out.println(a);    }}

  • “123451234512345”
  • Nothing – this will not compile. <<<<—Correct
  • a negative integer value
  • “12345100000”

Q15. What is the output of this code?

class Main {    public static void main (String[] args) {        String message = “Hello world!”;        String newMessage = message.substring(6, 12)            + message.substring(12, 6);        System.out.println(newMessage);    }}

  • The code does not compile.
  • A runtime exception is thrown <<<<—Correct
  • “world!!world”
  • “world!world!”
  • String m = “Hello world!”;
  • String n = m.substring(6,12) + m.substring(12,6);
  • System.out.println(n);

Q16. How do you write a foreach loop that will iterate over ArrayList<Pencil>pencilCase?

  • for(Pencil pencil = pencilCase){}
  • Iterator iterator = pencilCase.iterator();
  • for(){iterator.hasNext()}{}

Q17. Fill in the blanks?

Object-oriented programming (OOP) is a programming language model that organizes software design around (objects), rather than (actions).

Q18. What code would you use to tell if “schwifty” is of type String?

  • “schwifty”.getType() == String
  • “schwifty”.getClass().getsimpleName() == “String”
  • “schwifty”.getType().equals(“String”)
  • “schwifty” instanceof String <<<<—Correct

Q19. Correct output of “apple”.compareTo(“banana”)

  • 0
  • positive number
  • negative number <<<<—Correct
  • compilation error

Q20. You have an ArrayList of names that you want to sort alphabetically. Which approach would NOT work?

  • names.sort(Comparator.comparing(String::toString))
  • Collections.sort(names)
  • names.sort(List.DESCENDING) <<<— Correct (not too sure)
  • names.stream().sorted((s1, s2) -> s1.compareTo(s2)).collect(Collectors.toList())

Q21. By implementing encapsulation, you cannot directly access the class’s _____ properties unless you are writing code inside the class itself.

  • private <<<<—Correct
  • protected
  • no-modifier
  • public

Q22. Which is the most up-to-date way to instantiate the current date?

  • new SimpleDateFormat(“yyyy-MM-dd”).format(new Date())
  • new Date(System.currentTimeMillis())
  • LocalDate.now()
  • Calender.getInstance().getTime() <<<<— Correct

Q23. Fill in the blank to create a piece of code that will tell wether int0 is divisible by 5:

  • boolean isDivisibleBy5 = _____
  • int0 / 5 ? true: false
  • int0 % 5 == 0 <<<<—Correct
  • int0 % 5 != 5
  • Math.isDivisible(int0, 5)

Q24. How many time will this code print “Hello World!”?
Class Main {
    public static void main(String[] args){
        for (int i=0; i<10; i=i++){ 
          i+=1;
          System.out.println(“Hello World!”);
        }
    }
}

  • 10 times
  • 9 times
  • 5 times <<<<—Correct
  • infinite number of times

Q25. The runtime system starts your program by calling which function first?

  • print
  • iterative
  • hello
  • main <<<<—Correct

Q26. What is the result of this code?
try{
    System.out.print(“Hello World”);
}catch(Exception e){
    System.out.println(“e”);
}catch(ArithmeticException e){
    System.out.println(“e”);
}finally{
    System.out.println(“!”);
}

  • It will throw a runtime exception
  • It will not compile <<<<—Correct
  • Hello World!
  • Hello World

Q27. Which statement is NOT true?

  • An anonymous class may specify an abstract base class as its base type.
  • An anonymous class does not require a zero-argument constructor. <<<<—Correct
  • An anonymous class may specify an interface as its base type.
  • An anonymous class may specify both an abstract class and interface as base types

Q28. What will this program print out to the console when executed?
public class Main {   
public static void main(String[] args){
       LinkedList<Integer> list = new LinkedList<>();
       list.add(5);
       list.add(1);
       list.add(10);
       System.out.println(list);
    }
}

  • [5, 1, 10] <<<<—Correct
  • [10, 5, 1]
  • [1, 5, 10]
  • [10, 1, 5]

Q29. What is the output of this code?
class Main {   
public static void main(String[] args){
        String message = “Hello”;       
for (int i = 0; i<message.length(); i++){
System.out.print(message.charAt(i+1));       
}   
}
}    

  • “Hello”
  • A runtime exception is thrown. <<<<—Correct
  • The code does not compile.
  • “ello”
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