Careerschool - JAVA Pre-Screening Test

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Minimum Score to Pass is 45

Email *

Full Name *

Name of the College *

Reg Number *

Department Name *

Number of primitive data types in Java are? *

1 point

What is the size of float and double in java? *

1 point

32 and 32

64 and 64

64 and 32

32 and 64

Automatic type conversion is possible in which of the possible cases? *

1 point

Byte to Int

Int to Long

Long to Int

Short to Int

Find the output of the following code.

int Integer = 24; char String = ‘I’; System.out.print(Integer); System.out.print(String);

1 point

Compilation Error

Throws Exception

24 I

Find the output of the following program.

public class Solution{ public static void main(String[] args){ short x = 10; x = x * 5; System.out.print(x); } }

1 point

Compilation Error

Throws exception

Which of the following is not a Java features? *

1 point

Dynamic

Architecture Neutral

Use of pointers

Object-oriented

What is used to find and fix bugs in the Java programs.

1 point

JVM

JRE

JDB

JDK

Which of the following is a valid declaration of a char? *

1 point

char ch = '\utea';

char ca = 'tea';

char cr = \u0223;

char cc = '\itea';

What is the return type of the hashCode() method in the Object class? *

1 point

Object

int

long

void

Which of the following is a valid long literal? *

1 point

ABH8097

L990023

904423

0xnf029L

What does the expression float a = 25 / 0 return? *

1 point

Not a Number

Infinity

Run time exception

JDK Stands for? *

1 point

Java development kit

Java deployment kit

JavaScript deployment kit

None of these

JRE Stands for? *

1 point

Java run ecosystem

JDK runtime Environment

Java Runtime Environment

Java Runtime Error

What makes the Java platform independent? *

1 point

Advanced programming language

It uses bytecode for execution

Class compilation

All of these

What are the types of memory allocated in memory in java? *

1 point

Heap memory

Stack memory

Both A and B

None of these

Multiline comment is created using ___. *

1 point

/* */

<!-- -- >

All of these

Can we write a program without a main method in Java?
*

1 point

Yes

Which class in Java is used to take input from the user? *

1 point

Scanner

Input

Applier

Enter

Which of this interface must contain a unique element? *

1 point

Set

List

Array

Collection

Which of the following declarations does not compile? *

1 point

double num1, int num2 = 0;

int num1, num2;

int num1, num2 = 0;

int num1 = 0, num2 = 0;

What is the output of following program?

public class Test {

public static void main(String[] args) {

for(int i = 0; i < 5; i++) {

System.out.println(i + ' ');

}

1 point

1 2 3 4 5

Compilation Error

32 33 34 35 36

11 12 13 14 15

Find the value of A[1] after execution of the following program.
int[] A = {0,2,4,1,3}; for(int i = 0; i < a.length; i++){ a[i] = a[(a[i] + 3) % a.length]; } *

1 point

Identify the output of the following program.
String str = “abcde”; System.out.println(str.substring(1, 3)); *

1 point

abc

bcd

Identify the output of the following program.
Public class Test{ Public static void main(String argos[]){ String str1 = “one”; String str2 = “two”; System.out.println(str1.concat(str2)); } } *

1 point

one

two

onetwo

twoone

How many objects will be created in the following?
String a = new String(“Interviewbit”); String b = new String(“Interviewbit”); Strinc c = “Interviewbit”; String d = “Interviewbit”; *

1 point

Find the output of the following code.
int ++a = 100; System.out.println(++a); *

1 point

101

Compilation Error

100

None of these

Find the output of the following code.
Public class Solution{ Public static void main(String… argos){ Int x = 5; x * = (3 + 7); System.out.println(x); *

1 point

Output of Math.floor(3.6)? *

1 point

4.0

3.0

Identify the correct way of declaring constructor.

Public class Solution {}

1 point

Solution(){}

public Solution(){}

Solution(void){}

Both A & B

Find the output of the following code.
Public class Solution{ Public static void main(String args[]){ Int i; for(i = 1; i < 6; i++){ if(i > 3) continue; } System.out.println(i); } } *

1 point

How many times will “Interviewbit” be printed.

Int count = 0; do{ System.out.println(“Interviewbit”); count++; } while(count < 10);
*

1 point

Identify the infinite loop. *

1 point

for(; ;)

for(int i=0;i<1;i--)

for(int i = 0; ; i++)

All of the above

Which is the first line to trigger a compiler error?

double d1 = 5f; // p1

double d2 = 5.0; // p2

float f1 = 5f; // p3

float f2 = 5.0; // p4

1 point

What is true of the finalize() method? *

1 point

It may be called zero or one times.

It may be called zero or more times.

It will be called exactly once.

It may be called one or more times.

Which of the following is true about primitives? *

1 point

You can call methods on a primitive.

You can convert a primitive to a wrapper class object simply by assigning it.

You can convert a wrapper class object to a primitive by calling valueOf().

You can store a primitive directly into an ArrayList.

What is the output of the following?

Integer integer = new Integer(4); System.out.print(integer.byteValue()); System.out.print("-"); int i = new Integer(4); System.out.print(i.byteValue());

1 point

4-0

4-4

The code does not compile.

The code compiles but throws an exception at runtime

How do you force garbage collection to occur at a certain point? *

1 point

Call System.forceGc()

Call System.gc()

Call System.requireGc()

None of the above

Which of the following does not compile? *

1 point

double num = 2.718;

double num = 2._718;

double num = 2.7_1_8;

None of the above; they all compile

What is the value of tip after executing the following code snippet?

int meal = 5;

int tip = 2;

int total = meal + (meal>6 ? ++tip : --tip);

1 point

What is the output of the following application?

String john = "john";

String jon = new String(john); System.out.println((john==jon) + " "+ (john.equals(jon)));

1 point

true true

true false

false true

false false

Which of these is a type of variable in Java? *

1 point

Instance Variable

Local Variable

Static Variable

All of these

What is type casting in Java? *

1 point

It is converting type of a variable from one type to another

Casting variable to the class

Creating a new variable

All of these

Which of the following can be declared as final in java? *

1 point

Class

Method

Variable

All of these

The break statement in Java is used to ___. *

1 point

Terminates from the loop immediately

Terminates from the program immediately

Skips the current iteration

All of these

Can the Java program accept input from the command line? *

1 point

Yes, using command-line arguments

Yes, by access command prompt

None of these

Object in java are ___. *

1 point

Classes

References

Iterators

None of these

'this' keyword in java is ___. *

1 point

Used to hold the reference of the current object

Holds object value

Used to create a new instance

All of these

The 'super' keyword is used to ___. *

1 point

Access instance of the parent class

Access instance of the same class

Access instance of child class

Access instance of friend class

The super() method is used to ___. *

1 point

Call constructor of friend class

Is a declared method

Call constructor of the parent class

Call constructor

Boxing is ___. *

1 point

Creating new box

Creating object

Converting primitive type of object instance

All of these

public class Main
{
public static int ret(){
return 0;
}
public static void main(String[] args) {
int a = 0;
if(ret()==0)
System.out.print("Careerschool");
System.out.println("HRSolutions");
}
}
*

1 point

Careerschool HR Solutions

CareerschoolHRSolutions

Careerschool HRSolutions

Compilation Error

public class Main
{
public static void main(String[] args) {
int a = 0;
if(a==1);{
System.out.println("Careerschool");
}
}
}
*

1 point

Compilation Error

Nothing is printed

Careerschool

error: unreachable statement

public class Main
{
public static void main(String[] args) {
String temp = "10.87";
int a = Float.parseFloat(temp);
System.out.println(a);
}
}
*

1 point

10.87

10.00

error:possible loss of precision

public class Main
{
public static void main(String[] args) {
float a = 10.0000f;
String temp = Double.toString(a);
System.out.println(temp);
}
}
*

1 point

10.0000f

10.0000

10.00

10.0

public class Main
{
public static void main(String[] args) {
int a = 10.0;
String temp = Integer.toString(a);
System.out.println(temp);
}
}
*

1 point

10.0

error: loss precision

Exception

public class Main
{
public static int sum(int a, int b){
if(a+b>10)
return 0;
System.out.print(a+b);
return a+b;
}

public static void main(String[] args) {
System.out.println(sum(1, sum(0,1)));
}
}
*

1 point

123456789

12345678

122

None of the above

public class Main
{
public static int sum(int a, int b){
System.out.print(a+""+b);
return a+b;
}

public static void main(String[] args) {
System.out.println(sum(sum(1,2),3));
}
}
*

1 point

63321

12336

public class Main
{
public static int sum(int a, int b){
return a+b;
}

public static void main(String[] args) {
System.out.println(sum(sum(1,2),3));

}
}
*

1 point

Compilation Error

public class Main
{
public void sum(int a, int b){
System.out.print(a+b);
}

public static void main(String[] args) {
sum(0,0);
sum(-1,-1);

}
}
*

1 point

-2

0-1

0-2

Error

How many times 'Careerschool' is printed?

public class Main
{
public static void main(String[] args) {
while(false){
System.out.println("Careerschool");
}
}
}
*

1 point

Infinite Times

Error: Unreachable Statement

public class Main
{
private int a;
public Main(){

}
public Main(int temp){
a = -10;
}

public static void main(String[] args) {
Main obj = new Main();
System.out.println(obj.a);
}
}
*

1 point

-10

Undefined

Compilation Error

public class Main
{
public static void main(String[] args) {

int arr[] = {'a','b','c','d','e'};

System.out.print(arr);
}
}
*

1 point

abcde

6566676869

Compilation Error

Some Garbage Value

public class Main
{
public static void main(String[] args) {
int arr[] = {'a','b','c','d','e'};

for(int i = 0 ; i<5; i++){
System.out.print(" "+ (char)arr[i]);
}
}
}
*

1 point

a b c d e

96 97 98 99 101

0 1 2 3 4

0a 1b 2c 3d 4e

public class Main
{
public static void main(String[] args) {

int arr[] = {'a','b','c','d','e'};

for(int i = 0 ; i<5; i++){
System.out.print(" " + arr[i]);
}
}
}
*

1 point

a b c d e

abcde

97 98 99 100 101

0a 1b 2c 3d 4e

What is correct sequence of execution of any Java program?
*

1 point

Editing -> Compilation -> Class Loader -> Bytecode Verifier -> Execution

Editing -> Bytecode Verifier -> Compilation -> Class Loader -> Execution

Editing -> Compilation -> Bytecode Verifier -> Class Loader -> Execution

None of the above

public class Cshr{

public static void main(String args[]) {

int a =10;
String b = "10+10";

System.out.println(a+b);

}
}
*

1 point

1020

10+10+10

1010+10

public class CSHR{

public static void main(String args[]) {

int a =10;
String b = "10";

System.out.println(b+a);

}
}
*

1 point

10+10

1010

Compilation Error

Undefined

public class CppBuzz {

public static void main(String args[]) {

int a =10;
String b = "10";

System.out.println(a+b);

}
}
*

1 point

10"10"

Compilation Error

1010

import java.util.Scanner;

public class CppBuzz{

public static void main(String[] args){

String name;

Scanner sc = new Scanner(System.in);
System.out.println("Enter your name : ");
name = sc.nextLine(); //assume if user enters 'cppbuzz'

switch(name.length()){

case 5:
case 6:
case 7:
case 8:
case 9:
case 10: System.out.print("Length is 5-10"); break;
default: System.out.print("Length not in 5-10");

}

}
}
*

1 point

Compilation Error

Length is 5-10

Length not in 5-10

nothing is printed

public class CppBuzz{

public static void main(String[] args){

int a = 5;
a +=5;

switch(a){

case 5: System.out.print("5");break;
case 10: System.out.print("10");
System.out.print(((a%2 ==0) ? "-even-" : "-odd-"));
default: System.out.print("0");

}

}
}
*

1 point

Compilation Error

10-even-

10-odd-

10-even-0

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