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Multiple choice technology programming languages

Method-Overloading implements the principle of Compile-time Polymorphism, wheras Method Over-riding implements the concept of Runtime Polymorphism.

True
False

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Multiple choice technology programming languages

JVM is the compiler for Java.

True
False

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Multiple choice technology programming languages

How many objects are created in the below code...????

String s="abc";  
String s1=new String("def");

1 Object
2 Objects
3 Objects
4 Objects

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Multiple choice technology programming languages

What is the concept Below???

class A  {
    int x=10;
};

class B extends A  {
    int x=100;
    show()     {
        System.out.println(x);
    }
    public static void main(String... s)  {
        B b1=new B();
        b1.show();
    }
};

The program will print 100. But the concept illustrated is----

Data Shadowing
Data Over-riding
Data Obscuring
None of the Above

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Multiple choice technology programming languages

What is the output??(Easy One)

String s1="Java";
String s2="Java";
String s3=new String("Java");
String s4=new String("Java");
if(s1==s2)  System.out.print("true");
else  System.out.println("false");
if(s3==s4)  System.out.print("true");
else  System.out.println("false");
if(s1==s3)  System.out.print("true");
else  System.out.println("false");
if(s2==s3.intern())  System.out.print("true");
else  System.out.println("false");
if(s3.intern()==s2.intern())  System.out.print("true");
else  System.out.println("false");

Just try and get the Ouput---(Ignore any errors)

true false true false true
true false false true true
true false false false true
true false true false false

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Multiple choice technology programming languages

Variables are not interpolated inside which operator when used normally?

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Multiple choice technology programming languages

The regex /g.d?c*/ doesn't match

godccc
gddd
goc
gc

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Multiple choice technology programming languages

What is the outcome of the scenario on Unix platform: open(FH, ">c:\temp\notes.txt") ?

Opens a file notes.txt
fails to create a file and displays error
fails to open a file but doesn't display error
Opens a file but not notes.txt

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Multiple choice technology programming languages

$a=[ { name=> "rose", kids=> [ qw( ted bobby john ) ] }, { name=> "marge", kids=> [ qw( maggie lisa bart ) } ]

A list of hashes which contains a list
A hash of hashes which contains a list
A list of list which contains another list
A list of arrays and hashes containing lists

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Multiple choice technology programming languages

What happens when @_ is modified?

when arrays and references are passed
only when references are passed
args are not changed
Command line args are changed

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Tag: technology

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