Question 1

The __________ creates a software simulation of a CPU and memory and handles all communication between the Java program and the underlying operating system and hardware.

Accepted Answer

JVM

Question 2

A command for the documentation generator

Accepted Answer

javadoc

Question 3

Java source code is compiled to produce bytecode file

Accepted Answer

True

Question 4

What is the name of the class in this program:

 

class HelloJava{

     public static void main(String args[ ]){

          System.out.println(“Hello Java”);

     }

}

Accepted Answer

HelloJava

Question 5

boolean data type has two or more values

Accepted Answer

false

Question 6

Sun Microsystems is now a subsidiary of ?

Accepted Answer

Oracle Corporation

Question 7

short has a value that ranges from -32768 to 32767

Accepted Answer

true

Question 8

static is a state of a method

Accepted Answer

true

Question 9

The loader for java applications.

Accepted Answer

java

Question 10

Every statement in Java language should end with ":"?

Accepted Answer

false

Question 11

String is a primitive data type

Accepted Answer

true

Question 12

The main method is non-static because it must be called before the class that hosts the method is instantiated

Accepted Answer

false

Question 13

Who developed Java?

Accepted Answer

James Gosling

Question 14

What is the name of the class in this program:

 

class Rectangle{

     public static void main(String args[ ]){

          System.out.println(“This is a Rectangle”);

     }

}

Accepted Answer

Rectangle

Question 15

main method is void because the Java interpreter does not expect to receive or process any output from the class.

Accepted Answer

true

Question 16

An IDE doesn't have debugger

Accepted Answer

false

Question 17

Choose a Single Line Comment in Java Language below?

Accepted Answer

//Some comments

Question 18

println()provides string formatting.

Accepted Answer

false

Question 19

In standalone Java applications, which method is mandatory?

Accepted Answer

main method

Question 20

double data type has a width of 8 in bytes.

Accepted Answer

true

Question 21

Most IDEs today doesn't have GUI modeling utilities that simplify the development of UIs.

Accepted Answer

false

Question 22

One of the tools for Object oriented design includes object inspector

Accepted Answer

true

Question 23

It is a computer software to help computer programmers develop software.

Accepted Answer

Integrated Development Environment

Question 24

What are the valid White Spaces available in Java language?

Accepted Answer

All the above  (Enter, Space, Tab)

Question 25

It reads a String value from the user.

Accepted Answer

nextLine()

Question 26

nextFloat () reads a float value from the user.

Accepted Answer

true

Question 27

It is a class used to get user input.

Accepted Answer

Scanner

Question 28

What is the name of the class in this program:

 

class HelloJava{

     public static void main(String args[ ]){

          System.out.println(“Hello Java”);

     }

}

Accepted Answer

HelloJava

Question 29

It reads a long value from the user.

Accepted Answer

nextLong()

Question 30

Every statement in Java language should end with ","?

Accepted Answer

false

Question 31

It reads a byte value from the user.

Accepted Answer

nextByte()

Question 32

Choose a multiline comment in Java language below?

Accepted Answer

/*comments are going cars are moving*/

Question 33

A feature of java that provides extensive compile-time checking, followed by a second level of run-time checking.

Accepted Answer

Robust and secure

Question 34

A valid identifier in Java language may contain which characters?

Accepted Answer

All the choices (0-9 , $, _ (Underscore) , A-Z, a-z )

Question 35

An operator that copies a bit to the result if it exists in both operands.

Accepted Answer

& (bitwise AND)

Question 36

If any of the two operands are non-zero, then the condition becomes true.

Accepted Answer

||

Question 37

What will be the output of the following program?
        int c = 0, e = 50;
        boolean b = (c == 1) || (++e < 100);
        System.out.println("e = " + e);
        boolean f = (e++ < 100) || (c == 1);
        System.out.println("e = " + e);

Accepted Answer

e = 51
e = 52

Question 38

The label identifies any valid statement to which control must be transferred

Accepted Answer

true

Question 39

Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.

Accepted Answer

>

Question 40

int a[] = new int[50]; 
int i = 27 % 11; 
int j = 5 * 3;
int k = i - j;

a[i] = i; 
a[j] = j; 
a[k] = k; 
int sum = 0;

for(int l = 0; l < a.length; l++)
 {sum += a[l];}
System.out.println("Sum = " + sum);}}

output?

Accepted Answer

Throws ArrayIndexOutOfBoundsException

Question 41

What will be the output of the following program?

        boolean a = true;
        boolean b = true;
        boolean c = a & b;
        boolean d = a ^ b;
        boolean e = a || !b || c || !d;

        System.out.println("e = " + e);

Accepted Answer

e = true

Question 42

The continue statement causes the program flow to exit from the body of the switch construct.

Accepted Answer

false

Question 43

decrease the value of the variable by a particular number by which it was decreased

Accepted Answer

decrement operators

Question 44

...1 {...{
    short s = 10;
   int a = s;
   s += 10;
   System.out.println(s + "," + a); }}

...2 {... {
   short s = 10;
   int a = s;
   s = s + 10;
   System.out.println(s + "," + a); }}

compare programs

Accepted Answer

Both CrossCheck1 and CrossCheck2 produce same output.

Question 45

An operator that subtracts right-hand operand from left-hand operand.

Accepted Answer

-

Question 46

It multiplies right operand with the left operand and assign the result to left operand.

Accepted Answer

*-

Question 47

What will be the output of the following program?

        int i, j, k, l = 0;
        k = l++;
        j = ++k;
        i = j++;

        System.out.println(i);

Accepted Answer

1

Question 48

An operator that divides left-hand operand by right-hand operand and returns remainder.

Accepted Answer

%

Question 49

What is the index value of the first element?

Accepted Answer

0

Question 50

output?
  boolean lampX = false, result;
  boolean lampY = true;
  result = lampY || lampX;
  System.out.println("Lamp switch-on " + result);
  result = lampY | lampX;
  System.out.println("Lamp switch-on " + result);

Accepted Answer

Lamp switch-on true
Lamp switch-on true

Question 51

It adds right operand to the left operand and assign the result to left operand.

Accepted Answer

+=

Question 52

output?
for ( int count = 0;  count < 9;   )
System.out.print( count + " " );
count++ ;What is the result of -7%2
System.out.println( );

Accepted Answer

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...

Question 53

What is the result of -7%2

Accepted Answer

-1

Question 54

The BREAK statement causes the program flow to skip over and jump to the end of the loop body, and then return the control to the loop control statement.

Accepted Answer

false

Question 55

... {...{
      float f = 42.0f;
      float[] f1 = new float[2];
      float[] f2 = new float[2];
      float[] f3 = f1;
      long x = 42;
      f1[0] = 42.0f;}}
which statements is true?
 f1 == f2,f1 == f3,f2 == f1[1], x == f1[0], f == f1[0]

Accepted Answer

f1 == f3
x == f1[0]
f == f1[0]

Question 56

Output?

class ArrayOutput
{
    public static void main(String s[])
    {
        int a[] = {12, 15, 16, 17, 19};

        for(int i = 5 - 1; i > 0; i--)
        {
            System.out.println(a[i]);
        }
    }
}

Accepted Answer

19
17
16
15

Question 57

What will be the output of the following program ?

        int a = 10;
        int b = 15;
        a++;
        b--;
        int c = b % a;

        System.out.println(c >= b);

Accepted Answer

false

Question 58

out?
boolean a=T;boolean b=F;
System.out.println("a|b="+(a | b));
System.out.println("a&b="+(a & b));
System.out.println("a^b="+(a^b));
System.out.println("a^!b="+(a^!b));
System.out.println("!a&&b="+(!a&&b)); System.out.println("!a||!b="+(!a||!b));

Accepted Answer

a | b = true
a & b = false
a ^ b = true
a ^ !b = false
!a && b = false
!a || !b = true

Question 59

output?
       boolean lampX = false, result;
       boolean lampY = true;
       result = lampY || lampX;
       System.out.println("Lamp switch-on " + result);
       result = lampY && lampX;
       System.out.println("Lamp switch-on " + result);

Accepted Answer

Lamp switch-on true
Lamp switch-on false

Question 60

An operator that copies a bit if it exists in either operand.

Accepted Answer

| (bitwise OR)

Question 61

decrement operators decrease the value of the variable by a particular number by which it was decreased

Accepted Answer

true

Question 62

output?
        int a = 4;
        a++;
        a += a;
        --a;
        a = 7 + a;
        a *= a;
        a -= 3;

        System.out.println(" a = " + a );

Accepted Answer

a = 253

Question 63

...{...{
int[][] input = {{3, 5, 6, 7}, {2, 4}, {1}, {2, 3, 4, 5}};
int  result = 1;

for(int i = 0; i < input.length; i++)
{for(int j = 0; j < input[i].length - 1; j++)
   {result *= input[i][j];}}
System.out.println("Result = " + result);}}

Accepted Answer

Result = 4320

Question 64

is an operator used to perform bitwise operations on bit patterns or binary numerals that involve the manipulation of individual bits

Accepted Answer

bitwise operator

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CCS0023 m1-4