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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.

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

  /**

  /*

  //**

  //#

  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)

  (A), (B), (C) and (D)

  (B) and (D)

  (C) and (D)

  Half-n-half Clue
 

3.

What will be the output of the following program?
class Main2

  XXX

  YYY

  XXX followed by YYY

  Error. Won't compile

  Half-n-half Clue
 

4.

For the following class definition, which is a legal statement to construct an object of type Class1:
class Class1 extends Class2

  (A)

  (C) & (E)

  (A) & (B)

  (C) & (D)

  None of the above

  Half-n-half Clue
 

5.

The control expression in an "if" statement must be:

  an expression with type boolean

  an expression with type integer

  an expression with either the type boolean or integer

  an expression with either the type boolean or integer with value 0 or 1

  Half-n-half Clue
 

6.

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

  code is illegal and therefore will not compile

  output will be One

  output will be One followed by Two

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

  Half-n-half Clue
 

7.

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++)

  (B)

  (A) & (C)

  (A) & (D)

  (A)

  Half-n-half Clue
 


 
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