TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 5

INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 5

1. Automatic conversion from priitive type to an object of the corresponding wrapper class is called

(A)  coercing

(B)  casting

(C) boxing

(D) widening 

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ANSWER IS (C)

2.  The fact that any program can print using system.out.print , implies that 

(A)  system is defined in the package java.lang

 (B) system is a class name

(C) out is an object 

(D) print is a method 

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ANSWER IS  (A) , (B), (C) AND (D)

3. Which of the following are valid identifers?

(A) $ABC 

(B) _____(5 consecutive underscores)

(C) main

(D) protected

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ANSWER IS (A) ,(B) AND (C)

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 4

     TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 4

1. Exceptions that are expected to possibly occur are called

(A)  checked exceptions
(B) unchecked eceptions
(C) runtime exceptions
(D) errors

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ANSWER IS (A)

2. The following statements

String wer = "12\u3456\u78910 ";
System .out .println (wer. lenght());


(A)  print 4
(B) print 13
(C) print5
(D) print 15

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ANSWER IS (C)

3.Garbage collectors frees the programmer from worrying about

(A) memory leaks
(B) dangling refrences
(C) creating new objects
(D)  recursion

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ANSWER IS (D)

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 3

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 3

1.The given statements

   double whatIsThis = -1.0/0.0;
    system .out .println(whatIsThis);


(A) -Math .floor(-x)
(B)  -Math .cell(-x)
(c)  prints -Infinity
(D)  prints a garbage value

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ANSWER IS (C)

2.Math .cell(X) has the same value as


(A)  -Math .floor(-x)
(B) -Math .cell(-x)
(C) -Math .floor(-x)
(D) -Math .cell(x)

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ANSWER IS (A)

3. Let m be a variable of datatype byte .The value of m<<4 is same as


(A)  m x 2^4        (B)  4m             (C)   m^4              (D)   4+ m

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ANSWER IS (A)

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 2

  

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA 

 SET 2

1. Consider the following statement

    system .out.print ( math .round (math .random()));

This can print

(A)  only 0

(B) only 1

(C) only 0 or 1

(D) Any non-negative integer

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ANSWER IS (C)

2. Is null an object?

(A)  Yes

(B) No

(C) Sometimes yes

(D) None of these

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ANSWER IS (B)

3. Which of the following is used to get the error message for exception that was thrown?

(A) printMessage 

(B) extractMessage

(C) thrownMessage 

(D)  getMessage

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ANSWER IS (D)

4. Subclass is also called as

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA - SET 1

TECHNICAL INTERVIEW AND PRACTICE QUESTIONS ON JAVA

 SET 1

1. Which of the following is not a primitive data type ?

(A)  boolean

(B)  byte

(c)  string

(D)double

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ANSWER IS (C)

2. The given statement 

byte var = ~9

system.out.println(var);

(A)  prints -9

(B)  prints -10

(C) prints -119

(D) prints 118

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ANSWER IS (B)

3. The operators || , && , * , ! , if arranged in the ascending order of precendence, read

(A)  && , || , * , !

(B) || , && , * , !

(C)  || , && , ! , *

(D)  ! , || , && , *

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ANSWER IS (B)