QUIZ DAILY JAVA CORE

What is the output of these statements?

class OperatorExample{ 

public static void main(String args[]){ 

int a=10; 

int b=20; 

a+=4;

b-=4;

System.out.println(a); 

System.out.println(b); 

}}

• A. 4 and 4

• B. 14 and 4

• C. 14 and 16

• D. 14 and 24

What is the output of these statements?

for (int i = 1; i <= 10; ++i) {     

System.out.print(i);

}

• A. 2345678910

• B. 23456789

• C. 234567891011

• D. 12345678910

Which of the following opinion is TRUE about break and continue statement?

• A. continue leaves a loop, break jumps to the next iteration.

• B. break skips the current iteration of a for, while , or do-while loop

• C. break leaves a loop, continue jumps to the next iteration.

• D. None of the above

What is the output of these statements? 

   for(int i=0;i<10;i++)  

  {    

  if (i==4)     

   {     

       break;  

      }    

    System.out.print(i);  

  }

• A. 012

• B. 0123

• C. 01234

• D. None of the above

What is the output of these statements? 

   for(int i=0;i<10;i++)  

  {       

if (i==4)     

   {      

      continue;   

     }    

    System.out.print(i+"\t");  

  }

• A. 0123

• B. 01234

• C. 012356789

• D. None of the above

Types of Java Comments include:

• A. Single Line Comment

• B. Multi Line Comment

• C. Documentation Comment

• D. A and B are TRUE

• E. A, B and C are TRUE

What type of sorting with following statements?  

  static void mySort(int[] arr) {     

     int n = arr.length;    

      int temp = 0;    

       for(int i=0; i < n; i++){                

   for(int j=1; j < (n-i); j++){                  

          if(arr[j-1] > arr[j]){                            

       //swap elements                     

              temp = arr[j-1];                  

                 arr[j-1] = arr[j];               

                    arr[j] = temp;             

              }            

  }   

  } 

• A. BubbleSort

• B. SelectionSort

• C. InsertionSort

• D. None of the above

What type of sorting with following statements?  

  public static void mySort(int[] arr){    

      for (int i = 0; i < arr.length - 1; i++)     

     {       

       int index = i;     

         for (int j = i + 1; j < arr.length; j++){         

         if (arr[j] < arr[index]){              

        index = j;//searching for lowest index             

     }       

      }      

        int smallerNumber = arr[index];       

        arr[index] = arr[i];       

       arr[i] = smallerNumber;       

   } 

    }

• A. BubbleSort

• B. SelectionSort

• C. InsertionSort

• D. None of the above

What type of sorting with following statements? 

   public static void mySort(int array[]) { 

        int n = array.length;      

    for (int j = 1; j < n; j++) {             

int key = array[j];          

    int i = j-1;           

   while ( (i > -1) && ( array [i] > key ) ) {          

        array [i+1] = array [i];           

       i--;     

         }           

   array[i+1] = key;     

     }   

   } 

• A. BubbleSort

• B. SelectionSort

• C. InsertionSort

• D. None of the above

Which opinion is TRUE about naming conventions in java?

• A. class name should start with uppercase letter and be a noun

• B. interface name should start with uppercase letter and be an adjective

• C. method name should start with lowercase letter and be a verb

• D. variable name should start with lowercase letter

• E. All of the above