Question 1 of 25
Hints left: 3
Q1
What is output of the following code: public class Test{ public static void main(String[] args){ int[] x = {120, 200, 016 }; for(int i = 0; i < x.length; i++) System.out.print(x[i] + " "); } }
Q2
What is the result of compiling and running the following code? public class Test{ public static void main(String[] args){ int[] a = new int[0]; System.out.print(a.length); } }
Q3
In Java, how do you remove an element at a specific index from an ArrayList named list?
Q4
Which method is used to remove all elements from an ArrayList in Java?
Q5
When you pass an array to a method, the method receives ________ .
Q6
How do you find the index of an element in an ArrayList named list in Java?
Q7
In Java, how do you find the maximum element in an array?
Q8
What will be the output? public class Test{ public static void main(String[] args){ int[] x = new int[3]; System.out.println("x[0] is " + x[0]); } }
Q9
What will be the output? public class Test{ public static void main(String[] args){ int[] a = new int[4]; a[1] = 1; a = new int[2]; System.out.println("a[1] is " + a[1]); } }
Q10
Determine output: public class Test{ public static void main(String[] args){ int[] x = {1, 2, 3, 4}; int[] y = x; x = new int[2]; for(int i = 0; i < x.length; i++) System.out.print(y[i] + " "); } }
Q11
How do you check if an element exists in an array or ArrayList in Java?
Q12
Which method is used to add an element to the end of an ArrayList in Java?
Q13
What is the purpose of the Arrays.fill() method in Java?
Q14
What happens when you try to access an element at an index that is out of bounds in an ArrayList in Java?
Q16
In Java, what is the purpose of the Arrays.equals() method?
Q17
What would be the result of attempting to compile and run the following code? public class HelloWorld{ public static void main(String[] args){ double[] x = new double[]{1, 2, 3}; System.out.println("Value is " + x[1]); } }
-
A
-
B
-
C
-
D
Q18
Which one of the following is a valid statement?
Q19
Which of the following statements is true about ArrayLists in Java?
Q20
Which will legally declare, construct, and initialize an array?
Q21
What will be the output of the program? public class Test{ public static void main(String [] args){ String s1 = args[1]; String s2 = args[2]; String s3 = args[3]; String s4 = args[4]; System.out.print(" args[2] = " + s2); } } and the command-line invocation is C:Java> java Test 1 2 3 4
Q22
What is the purpose of the Arrays.sort() method in Java?
Q23
How do you declare a multi-dimensional array in Java?
Q24
Analyze the following code and choose the correct answer. int[] arr = new int[5]; arr = new int[6];
Q25
What is the output of the following code? public class Test{ public static void main(String args[]){ double[] myList = {1, 5, 5, 5, 5, 1}; double max = myList[0]; int indexOfMax = 0; for(int i = 1; i < myList.length; i++){ if(myList[i] > max){ max = myList[i]; indexOfMax = i; } } System.out.println(indexOfMax); } }