QA test (LNU 2021)

What is Z?

X + X + Z = 17

Y + Y + Z = 17

X + Y = 10

• 3

• 5

• 6

• 7

How many swaps are required to sort the given array using bubble sort ascending - { 2, 5, 1, 3, 4}

• 4

• 5

• 6

• 7

What will be the output of the program?&nbsp;</p>

boolean bool = true;

if (bool = false) {

System.out.println("a");

} else if (bool) {

System.out.println("b");

} else if (!bool) {

System.out.println("c");

} else {

System.out.println("d");

}

• a

• b

• c

• d

java.util.Collections is a

• Class

• Interface

• Object

• None of the above

Which of those allows duplicate elements?

• Set

• List

• All

• None of the above

Object-Oriented Programming means

• being objective about what you develop

• designing the application based on the objects discovered when analyzing the problem

• writing an algorithm before writing your program and having a test plan

• writing a program composed of Java classes

Which of the following is not a Java keyword?

• static

• try

• Integer

• new

One or more function that has different number of argument or different type of argument but all have same return type is called as ...

• method overloading

• method overriding

• method overdriving

• method differentiating

Given the declaration: int [] ar = {1,2,3,4,5}; What is the value of ar[4]?

• 2

• 3

• 4

• 5

What type parameter must the following method be called with? int myMethod(double[] ar) {...}

• an empty double array

• a reference to an array that contains elements of type double

• a reference to an array that contains zero or more elements of type int

• an array of any length that contains double and must be named ar.