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Java Programming : Compilation and Execution: Multiple Choice


Answer the following questions about Java syntax and mistakes which can cause compilation errors, as well as the output generated by sample programs.

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Multiple choice

Your Performance  

1.

The method int func(int i, int j)

  (B) & (C)

  (C) & (D)

  (A), (B), (C) & (E)

  (A), (B) & (E)

  None of these

  Half-n-half Clue
 

2.

To print the value of a variable "x" of type int, which of the following expressions can be used:
(A) System.out.println("x = " + x);
(B) System.out.println("x = " + String.valueOf(x));
(C) System.out.println("x = " + Integer.toString(x));
(D) System.out.println("x = " + (new Integer(x)).toString());

  (B), (C) and (D)

  (B) and (D)

  (A), (B), (C) and (D)

  (C) and (D)

  Half-n-half Clue
 

3.

Examine the following code snippets to identify the legal loop constructs:
(A) for (int i = 22, int j = 0; i + j > 11; i = i-3, j++)

  (A) & (C)

  (A) & (D)

  (A)

  (B)

  Half-n-half Clue
 

4.

Consider the following code:
int i = 1;
switch(c)

  output will be One followed by Two

  output will be One

  output will be One, followed by Two, and then followed by Three

  code is illegal and therefore will not compile

  Half-n-half Clue
 

5.

Consider the following code:
class NewString extends java.lang.String

  Results in error because java.lang.String isfinal

  Results in error because String isabstract

  Results in error because the class is not declaredpublic

  Compiles successfully

  Results in error because class body is not defined

  Half-n-half Clue
 

6.

With javadoc, which of the following denotes a javadoc comment?

  //**

  //#

  /*

  /**

  Half-n-half Clue
 

7.

Which lines of the following will produce an error?
1. byte a1 = 2, a2 = 4, a3;
2. short s = 16;
3. a2 = s;
4. a3 = a1 * a2;
(The lines are numbered only for illustration in this question.)

  Line 1 only

  Line 1 and Line 4

  Line 3 only

  Line 3 and Line 4

  Line 4 only

  Half-n-half Clue
 


 
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