MCQ 1 How can we identify whether a compilation unit is class or interface from a .class file?

(A) Java source file header (B) Extension of compilation unit (C) We cannot differentiate between class and interface (D) The class or interface name should be postfixed with unit type

MCQ 2 The jdb is used to

(A) Create a jar archive (B) Debug a java program (C) Create C header file (D) Generate java documentation

MCQ 3 The _______________ and _________________ classes are abstract classes that support reading and writing of byte streams.

(A) reader, writer (B) inputstream, outputstream (C) objectinputstream, objectoutputstream (D) none

MCQ 4 State true or false for Java Program.
i) Data members of an interface are by default final
ii) An abstract class has implementations of all methods defined inside it.

(A) i × False, ii × False (B) i × False, ii × True (C) i × True, ii × False (D) i × True, ii × True

MCQ 5 The new operator dynamically allocates ______________ for an object and returns a reference to it.

(A) classes (B) variables (C) memory (D) None of the above

MCQ 6 Each method in a java class must have a unique name

(A) Not necessarily (B) 1 (C) 0 (D) None of the above

MCQ 7 All java classes are derived from

(A) java.lang.Class (B) java.util.Name (C) java.lang.Object (D) java.awt.Window

MCQ 8 Which component is responsible for converting bytecode into machine specific code?

(A) JVM (B) JDK (C) JIT (D) JRE

MCQ 9 Which of the following do not represent legal flow control statements?

(A) break; (B) return; (C) exit(); (D) continue outer;

MCQ 10 If a variable is declared FINAL, it must include _________________ value.

(A) integer (B) number (C) initial (D) float

MCQ 11 In java RMI, stub is located in

(A) client machine (B) proxy (C) server (D) none of the above

MCQ 12 ______________ is the wrapper class.

(A) Random (B) Byte (C) Vector (D) String

MCQ 13 The string is defined in ______________ name space.

(A) java.Lang (B) java.String (C) java.Char (D) java.Awt

MCQ 14 _______________ is passed to a method by use of call by reference.

(A) Variables (B) Objects (C) Methods (D) Operators

MCQ 15 Which of the following is not keyword?

(A) NULL (B) implements (C) protected (D) switch

MCQ 16 System.in.read() is being used, the program must specify the _______________ clause.

(A) throws.java.out.IOException (B) throws.java.in.IOException (C) throws.java.io.IOException (D) throws.java.io.InException

MCQ 17 The _________________ looks only for a match between the value of the expression and one of its case constants.

(A) if (B) match (C) switch (D) None of the above

MCQ 18 The most common problem of writing a java program is

(A) Missing of double quotes in strings (B) Missing of brackers and methods (C) Missing of double quotes in strings (D) All of these

MCQ 19 The bitwise AND operator is represented by a single ampersand (&) and is surrounded on both sides by

(A) Integer expression (B) Colons (C) Semicolons (D) Commas

MCQ 20 What are the exceptions which have to be handled in a RMI client program?

(A) RemoteException (B) NotBoundException (C) MalFormedURLException (D) All mentioned above

MCQ 21 Which of the following is an advantage of the statement – Separation of business logic from JSP ?

(A) Custom Tags in JSP (B) JSP Standard Tag Library (C) All the above (D) All of the above

MCQ 22 The java variable is/are

(A) Instance variables (B) Class variables (C) Local variables (D) All of these

MCQ 23 Which variables are created when an object is created with the use of the keyword 'new' and destroyed when the object is destroyed?

(A) Local variables (B) Instance variables (C) Class Variables (D) Static variables

MCQ 24 The state of left cycle of a thread is

(A) Runable state (B) Running state (C) Blocked state (D) All of these

MCQ 25 POP is a/an

(A) Object oriented programming (B) Object optional programming (C) Optional object programming (D) None of these