Technology | Practice Questions | Aliensbrain

Multiple choice technology java

After the declaration: char[] c = new char[100]; what is the value of c[50]?

50
‘\u0000'
cannot be determined
always null until a value is

Reveal answer Fill a bubble to check yourself

Multiple choice technology

If you compile and execute an application with the following code in its main() method: String s = new String( "Computer" ); if( s == "Computer" ) System.out.println( "Equal A" ); if( s.equals( "Computer" ) ) System.out.println( "Equal B" );

It will not compile because the
"Equal A" is the only thing that is printed
"Equal B" is the only thing that is printed
Both "Equal A" and

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Consider the two statements: 1. boolean passingScore = false && grade == 70; 2. boolean passingScore = false & grade == 70;The expression grade == 70 is evaluated:

in both 1 and 2
in neither 1 nor 2
in 1 but not 2
invalid because false should be FALSE

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Consider this class example: class MyPoint { void myMethod() { int x, y; x = 5; y = 3; System.out.print( " ( " + x + ", " + y + " ) " ); switchCoords( x, y ); System.out.print( " ( " + x + ", " + y + " ) " ); } void switchCoords( int x, int y ) { int temp; temp = x; x = y; y = temp; System.out.print( " ( " + x + ", " + y + " ) " ); }}What is printed to standard output if myMethod() is executed?

(5, 3) (5, 3) (5, 3)
(5, 3) (3, 5) (5, 3)
(5, 3) (3, 5) (3, 5)
(3, 3) (3, 5) (3, 5)

Reveal answer Fill a bubble to check yourself

Multiple choice technology

To declare an array of 31 floating point numbers representing snowfall for each day of March in Gnome, Alaska, which declarations would be valid?

double snow[] = new double[31];
doublesnow[31] = new array[31];
doublesnow[31] = new array;
double[]snow = new double[31];

Reveal answer Fill a bubble to check yourself

Multiple choice technology

If arr[] contains only positive integer values, what does this function do? public int guessWhat( int arr[] ){ int x= 0; for( int i = 0; i < arr.length; i++ ) x = x < arr[i] ? arr[i] : x; return x;}

Returns the index of the highest
Returns true/false if there are any elements that repeat in the array
Returns how many even numbers are in the array
Returns the highest element in the array

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Consider the code below: arr[0] = new int[4]; arr[1] = new int[3]; arr[2] = new int[2]; arr[3] = new int[1]; for( int n = 0; n < 4; n++ ) System.out.println( /* what goes here? */ );

arr[n].length();
arr.size;
arr.size-1;
arr[n].length;

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Method Overloading blocks the Inheritance from the Super Class

True
False
cant be said
none of the above

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Interfaces can be used to implement the Inheritance relationship between the non-related classes that do not belongs to the same hierarchy, i.e. any Class and any where in hierarchy.An interface can not be

native
synchronize
protected or private.
All of the above

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Which amongst the following is not a valid statements type

Create statement
Prepared Statement
Callable Statement
Synchronized statement

Reveal answer Fill a bubble to check yourself

Tag: technology

Questions Related to technology