Question 1

Which is a valid keyword in java?

A. interface B. string C. Float D. unsigned

Question 2

When is the object created with new keyword?

A. At run time B. At compile time C. Depends on the code D. None

Question 3

Which will legally declare, construct, and initialize an array?

A. int [] myList = {"1", "2", "3"}; B. int [] myList = (5, 8, 2); C. int myList [] [] = {4,9,7,0}; D. int myList [] = {4, 3, 7};

Question 4

Which is the valid declarations within an interface definition?

A. public double methoda(); B. public final double methoda(); C. static void methoda(double d1); D. protected void methoda(double d1);

Question 5

Can one block of except statements handle multiple exceptions?

A. No, Multiple exceptions cannot be handled in a single block B. Yes, likeexcept [ NameError, SyntaxError, ...] C. Yes, likeexcept NameError, SyntaxError, … D. Yes, likeexcept ( NameError, SyntaxError, ...)

Question 6

In the given program, how many lines of output will be produced? <pre class="prettyprint"><xmp> public class Test { public static void main(String [] args) { int [] [] [] x = new int [3] [] []; int i, j; x[0] = new int[4][]; x[1] = new int[2][]; x[2] = new int[5][]; for (i = 0; i < x.length; i++) { for (j = 0; j < x[i].length; j++) { x[i][j] = new int [i + j + 1]; System.out.println("size = " + x[i][j].length); } } } } </xmp></pre>

A. 7 B. 9 C. 11 D. 13

Question 7

What will be the output of the program? <pre class="prettyprint"> <xmp> public class X { public static void main(String [] args) { String names [] = new String[5]; for (int x=0; x < args.length; x++) names[x] = args[x]; System.out.println(names[2]); } } </xmp></pre> <p>and the command line invocation is</p> <p>

A. names B. null C. Compilation fails D. An exception is thrown at runtime

Question 8

Which one of the following will declare an array and initialize it with five numbers?

A. Array a = new Array(5); B. int [] a = {23,22,21,20,19}; C. int a [] = new int[5]; D. int [5] array;

Question 9

Which one is a valid declaration of a boolean?

A. boolean b1 = 0; B. boolean b2 = 'false'; C. boolean b3 = false; D. boolean b4 = Boolean.false();

Question 10

Which four options describe the correct default values for array elements of the types indicated? <ol class="java-ol-1234"> <li>int -> 0</li> <li>String -> "null"</li> <li>Dog -> null</li> <li>char -> '\u0000'</li> <li>float -> 0.0f</li> <li>boolean -> true</li> </ol>

A. 1, 2, 3, 4 B. 1, 3, 4, 5 C. 2, 4, 5, 6 D. 3, 4, 5, 6

Java Language Fundamental