TCS Tech Lounge JAVA Final-14

public class precedence{

                                public static void main(String[] args){

                                    int i = 0;

                                    i= i++;

                                    i= i++;

                                    i= i++;

                                    i= i++;

                                    System.out.println("The value of is"+i);

                                    int arr[] = new int[5];

                                    int index = 0;

                                    arr[index] = index = 3;

                                    System.out.println("The value of first element is"+arr[0]);

                                    System.out.println("The value of fourth element is"+ arr[3]);

                                }

}

ANS: all of the above

The value of i is 0

The value of first element is 3

The value of fourth element is 0

Which of the following has child class?

ANS: FilterReader

Which of these operator is used to allocate memory to array variable in java

ANS: new

What are the key elements of Problem Solving?

ANS:  ALL of these ( declarative & Imperative Knowledge, Good analytical Skills)

public class Exam1{

                                public static void main(String[] args){

                                    int a=5;

                                    int b=2;

                                    int c=a-b;

                                    if(c=3){

                                                System.out.println("Thats correct");

                                    }else{

                                                System.out.println("thats worng");

                                    }

                                }

}

ANS: Compile error

JRE stands for java _ _ _Environment

ANS: Runtime

Which statement is true?

1.      Serialization applies only to OBJECTS

2.      Static variables are NEVER saved as part of the objet state.So static variables are not Serializable.

ANS: Both statements 1&2

Issuing commit command does which of the following

ANS: Release all savepoints

Which of the following is the weakest relationship

ANS: Dependecy

Which of these contain heterogenous objects

ANS: ArrayList

How many parameter does readBoolean() of DataInputStream accepts?

Ans: 0

Which is not method of InputStreamReader

ANS: open()

For a static field, regardless of the number instances created, will hold the same data across all objects

ANS: TRUE

Single line comment starts with _ _ _ in java

ANS: //

What is the name of the stream that connects two running programs?

ANS: Pipe

Hotspot is an implementation of the JVM concept.It provides

ANS: garbage collector

Which method returns the time when the session was created?

ANS: getCreateTime()

public class precedence{

                                public static void main(String[] args){

                                int num = 10;

                                switch(num){

                                    case 8: System.out.println("The selection is 9");

                                    break;

                                    case 20: System.out.println("The selection is 20");

                                    break;

                                    case 30: System.out.println("The selection is 30");

                                    break;

                                    case 40: System.out.println("The selection is 40");

                                    break;

                                    default: System.out.println("Invalid Selection");

                                }

                                }

}

ANS: Invalid selection