Java Programming OOP Questions and Answers Set 4

Java Programming OOPs

Questions 31 to 40

31.	Mark the incorrect statement from the following: (a)   Java is a fully object oriented language with strong support for proper software engineering techniques (b)   In java it is not easy to write C-like so called procedural programs (c)   In java language objects have to be manipulated (d)   In java language error processing is built into the language (e)   Java is not a language for internet programming.
32.	In java, objects are passed as (a)  Copy of that object                          (b)  Method called call by value (c)  Memory address                                                            (d)  Constructor     (e)  Default constructor.
33.	Which of the following is not a component of Java Integrated Development Environment (IDE)? (a)  Net Beans                                        (b)  Borland’s Jbuilder (c)  Symantec’s Visual Café                    (d)  Microsoft Visual Fox Pro (e)  Microsoft Visual J++.
34.	Identify, from among the following, the incorrect variable name(s). (a)  _theButton                                       (b)  $reallyBigNumber (c)  2ndName                                         (d)  CurrentWeatherStateofplanet (e)  my2ndFont.
	Use the following declaration and initialization to evaluate the Java expressions given in questions 5 - 8; int a = 2, b = 3, c = 4, d = 5; float k = 4.3f;
35.	System.out.println( - -b * a + c *d - -); (a)  21                     (b)  24                     (c)  28                     (d)  26                     (e)  22.
36.	System.out.println(a++); (a)  3                       (b)  2                       (c)  4                       (d)  10           (e)  Synatax error.
37.	System.out.println (–2U * ( g – k ) +c); (a)  6                       (b)  3                       (c)  2                       (d)  1              (e)  Syntax error.
38.	System.out.println (c=c++); (a)  2                       (b)  4                       (c)  5                       (d)  8              (e)  Syntax error.
39.	Consider the following Java program : class IfStatement{ public static void main(String args[])        {        int a=2, b=3;               if (a==3)               if (b==3)               System.out.println("===============");               else               System.out.println("#################");               System.out.println("&&&&&&&&&&&");        } } Which of the following will the output be? (a)   =============== (b)   ################# &&&&&&&&& (c)   &&&&&&&&&&& (d)   =============== ################# &&&&&&&&&& (e)   ################.
40.	An applet cannot be viewed using (a)   Netscape navigator (b)   Microsoft Internet Explorer (c)   Sun’ Hot Java Browser (d)   Applet viewer tool which comes, with the Java Development Kit. (e)   Jbuilder.
	Use the following Java program for answering question 11 and 12 class test{  void meth(int i, int j)      {        i *= 2;        i /= 2;      } } class argumentPassing {        public static void main(String args[])               {               test ob = new test();               int a = 15, b = 20;               System.out.println("a and b before call :"+ a +" " + b);               ob.meth(a,b);               System.out.println("a and b after call : "+ a + " " +b);                       }                                (Program – III)

Answers

31.	Answer : (d) Reason : Java is basically designed for compiler construction but later on it is also being used for internet programming.
32.	Answer : (c) Reason : Objects are passed as  memory address  but not by the constructor etc.,
33.	Answer : (c) Reason : Micro soft visual foxpro is not the part of IDE
34.	Answer : (c) Reason : A variable name should not start with numeric digit,
35.	Answer : (b) Reason : Based on the hierarchy of operations 24 is correct answer.
36.	Answer : (b) Reason : Based on the postincrementation operator 2 is the correct answer.
37.	Answer : (e) Reason : Syntatically the expression is wrong.
38.	Answer : (b) Reason : first c is assigned by 2 and then incremented
39.	Answer : (c) Reason : C is the right choice because of the IF statement hierarchy.
40.	Answer : (d) Reason : Applet cant be viewed using JBuilder.

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