Prabhakaran Balasubramaniam

About Life

noreply@blogger.com (Prabhakaran Balasubramaniam) — Mon, 28 Jan 2013 21:00:00 -0800

The acts of this life are the destiny of next.

We make a living…

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sat, 19 May 2012 08:07:00 -0700

What we have done for ourselves dies with us,

But what we have done for others remains forever.

We make a living by what we got,

But we make a life by what we give

Follow Your Dreams

noreply@blogger.com (Prabhakaran Balasubramaniam) — Mon, 21 Nov 2011 03:31:00 -0800

Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world.

Harriet Tubman

Happiness Quotes

noreply@blogger.com (Prabhakaran Balasubramaniam) — Tue, 15 Nov 2011 17:35:00 -0800

When one door of happiness closes, another opens, but often we look so long at the closed door that we do not see the one that has been opened for us.
Helen Keller

Hub and Its Types

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sat, 8 Oct 2011 20:42:00 -0700

A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

A passive hub serves simply as a conduit for the data, enabling it to go from one device (or segment) to another. So-called intelligent hubs include additional features that enables an administrator to monitor the traffic passing through the hub and to configure each port in the hub. Intelligent hubs are also called manageable hubs.

A third type of hub, called a switching hub, actually reads the destination address of each packet and then forwards the packet to the correct port.

C++ OBJECTIVE TYPE QUESTIONS

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sat, 1 Oct 2011 06:41:00 -0700

1. In the code fout.open("scores.dat", ios::out);

a. ios::out is the stream operation mode b. fout is the header file reference

c. ios::out is the stream variable name d. fout is the name of the file.

Answer : a

2. ifstream fin would be used when

a. creating a file b. reading a file

c. appending a file d. removing a file

Answer : b

3. eof( ) is the function used for

a. asserting no errors in a file b. appending data to a file

c. counting the amount of data in a file d. checking for end of file

Answer : d

4. How many files can be accessed at a time?.

a. Zero b. One c. Two d. Many

Answer : d

5. Which of the following header files is required for creating and reading data files?

a. ofstream.h b. fstream.h c. ifstream.h d. console.h

Answer : b

RDBMS Concepts

noreply@blogger.com (Prabhakaran Balasubramaniam) — Thu, 15 Sep 2011 07:25:00 -0700

1. What is database?

A database is a logically coherent collection of data with some inherent meaning, representing some aspect of real world and which is designed, built and populated with data for a specific purpose.

2. What is DBMS?

It is a collection of programs that enables user to create and maintain a database. In other words it is general-purpose software that provides the users with the processes of defining, constructing and manipulating the database for various applications.

3. What is a Database system?

The database and DBMS software together is called as Database system.

4. Advantages of DBMS?

Redundancy is controlled.

Unauthorised access is restricted.

Providing multiple user interfaces.

Enforcing integrity constraints.

Providing backup and recovery.

5. Disadvantage in File Processing System?

Data redundancy & inconsistency.

Difficult in accessing data.

Data isolation.

Data integrity.

Concurrent access is not possible.

Security Problems.

Apple iCup

noreply@blogger.com (Prabhakaran Balasubramaniam) — Mon, 12 Sep 2011 03:56:00 -0700

iCup is an innovative concept specially designed for Apple. It’s key point that you can heat up any drink inside the cup by connecting it with the user’s notebook, as well as any device that supports USB connection, via a USB cable(in Park,at office,at library etc.) The key goal of the project is to ease life with more manageable features that ensure uninterrupted working opportunity, doesn’t matter the user goes to the park, library or working in the office. The featured Apple logo of the cup is actually a heat indicator that shows the temperature of the inside content, blue for cool, orange for warm and pink for hot, while enhancing the aesthetics. Moreover, it incorporates a displaceable handle that offers convenient fit into any small area and the changeable upper portion allows easy washing.

Every part of the iCup from Onur Karaalioglu is enhanced with advanced technologies and innovative ideas. The Apple cup has got everything like a heatproof body which anyone can touch and hold while being connected to the netbook, a heat filter, allochrous logo for easy handling, a heat coil and a durable base.

A person, sitting in a library, in their office, in a park or while working at home on their netbook will not have to long for a hot cup of tea or coffee or will no longer have to keep ordering for a fresh cup every time when finding it getting cold. For heating up your drink this special cup named as the iCup would hopefully not just be a concept and will soon be available at the Apple store. The specialty of this cup is that it is easy to use, easy to connect and most importantly, easy to wash. For washing the iCup, one will just have to bring out the inner part of the cup as it is of removable kind. So, once the washing process is done and it gets dry, you can easily place it again in the heatproof body. For further ease of use, this Apple iCup has been designed with a removable handle too.

C++

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sun, 11 Sep 2011 00:57:00 -0700

1)The meaning of conversion character for data input is

(A) Data item is a long integer

(B) Data item is an unsigned decimal integer

(D) None of the above

Ans : C

2) The conversion characters for data input means that the data item is

(A) An unsigned decimal integer

(B) A short integer

(D) A string followed by white space

Ans : D

3) An expression contains relational, assignment and arithmetic operators. If Parenthesis are not present, the order will be

(A) Assignment, arithmetic, relational

(B) Relational, arithmetic, assignment

C) Assignment, relational, arithmetic

(D) Arithmetic, relational, assignment

Ans : D

4) Which of the following is a key word is used for a storage class

(A) Printf

(B) External

(D) Scanf

Ans : C

5) In the C language 'a’ represents

(A) A digit

(B) An integer

(D) A word

Ans : C

SYNONYMS

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sat, 27 Aug 2011 06:03:00 -0700

1.Moribund – declining, dilapidated, waning

2.Repudiate – reject, disclaim, renounce, deny

3.Translucent – transparent, semi- transparent, lucid, lucent, clear, see through

4. Mitigate- alleviates, lessen, ease, alley, tune down, dull, Assuage

5. Inundate – flood, overwhelm, swamp, submerge

6. Bilk – deceive, trick, swindle, con

7.Nettle – annoy, irritate, vex

8.Impugn – hold responsible, charge, censure, accuse

9. Mulch

10.Tenacity – stubbornness, resolve, firmness, persistence, insistence, determination

SYNONYMS

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sat, 27 Aug 2011 06:01:00 -0700

Admonish = usurp (reprove) merry = gay

Alienate = estrange (isolate) instigate = incite

Dispel = dissipate (dismiss) belief = conviction

Covet= crave (desire) belated = too late

Solicit = beseech (seek) brim = border

Subside = wane (drop) renounce= reject

Hover = linger (stay close) divulge = reveal

Heap = to pile (collect) adhesive = bonding agent

Veer = diverge (turn) hamper = obstruct

Caprice = whim (impulse) to merit= to deserve

Stifle = suffocate (smother) inert = passive

Latent = potential (inactive) latitude = scope

Concur = acquiesce (accept) momentary = transient

Tranquil = serene (calm) overt = obvious

Lethargy = stupor (lazy) volume = quantity

Furtive= stealthy (secret) meager = scanty

Cargo = freight (load) baffle = frustrate

Efface = obliterate (wipe out) misery = distress

Pretentious = ostentatious (affected) discretion = prudence

Compunction = remorse (regret) amiable = friendly

Cajole = coax (wheedle – sweet talk) incentive = provocation

C++ Questions

noreply@blogger.com (Prabhakaran Balasubramaniam) — Fri, 26 Aug 2011 19:09:00 -0700

1.class base

{

public:

int bval;

base(){ bval=0;}

};

class deri:public base

{

public:

int dval;

deri(){ dval=1;}

};

void SomeFunc(base *arr,int size)

{

for(int i=0; i

cout<bval;

cout<

}

int main()

{

base BaseArr[5];

SomeFunc(BaseArr,5);

deri DeriArr[5];

SomeFunc(DeriArr,5);

}

Answer:

00000

01010

Explanation:

The function SomeFunc expects two arguments.The first one is a pointer to an array of base class objects and the second one is the sizeof the array.The first call of someFunc calls it with an array of bae objects, so it works correctly and prints the bval of all the objects. When Somefunc is called the second time the argument passed is the pointeer to an array of derived class objects and not the array of base class objects. But that is what the function expects to be sent. So the derived class pointer is promoted to base class pointer and the address is sent to the function. SomeFunc() knows nothing about this and just treats the pointer as an array of base class objects. So when arr++ is met, the size of base class object is taken into consideration and is incremented by sizeof(int) bytes for bval (the deri class objects have bval and dval as members and so is of size >= sizeof(int)+sizeof(int) ).

C++

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sun, 3 Jul 2011 06:00:00 -0700

1) class base

{

public:

void baseFun(){ cout<<"from base"<

};

class deri:public base

{

public:

void baseFun(){ cout<< "from derived"<

};

void SomeFunc(base *baseObj)

{

baseObj->baseFun();

}

int main()

{

base baseObject;

SomeFunc(&baseObject);

deri deriObject;

SomeFunc(&deriObject);

}

Answer:

from base

Explanation:

As we have seen in the previous case, SomeFunc expects a pointer to a base class. Since a pointer to a derived class object is passed, it treats the argument only as a base class pointer and the corresponding base function is called.

2) class base

{

public:

virtual void baseFun(){ cout<<"from base"<

};

class deri:public base

{

public:

void baseFun(){ cout<< "from derived"<

};

void SomeFunc(base *baseObj)

{

baseObj->baseFun();

}

int main()

{

base baseObject;

SomeFunc(&baseObject);

deri deriObject;

SomeFunc(&deriObject);

}

Answer:

from base

from derived

Explanation:

Remember that baseFunc is a virtual function. That means that it supports run-time polymorphism. So the function corresponding to the derived class object is called.

SYNONYMS

noreply@blogger.com (Prabhakaran Balasubramaniam) — Mon, 27 Jun 2011 07:25:00 -0700

Admonish= usurp
Adhesive = tenacious, sticky, glue, gum, bonding agent
Alienate = estrange
Bileaf = big screen, big shot, big success
Belief = conviction
Baffle = puzzle
Brim = edge
Covet = to desire
Caprice = whim
Concur = similar, acquiesce
Confiscate = appropriate, to take charge, to annex
Cargo = load, luggage
Dispel = scatter
Divulge = reveal, make known, disclose

ANALOGY

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sun, 26 Jun 2011 07:11:00 -0700

1 . Moon : Satellite : : Earth :?
(A) Sun (B) Planet (C)Solar System (D) Asteroid
Ans: (B)
Explanation: Moon is a satellite and Earth is a Planet .

2 . Forecast : Future : : Regret :?
(A) Present (B) Atone (C)Past (D)Sins
Ans: (C)
Explanation: Forecast is for Future happenings and Regret is for past actions .

3. Influenza : Virus : : Typhoid : ?
(A) Bacillus (B)Parasite (C)Protozoa (D) Bacteria
Ans: (D)
Explanation: First is the disease caused by the second .

4. Fear : Threat : : Anger : ?
(A)Compulsion (B)Panic (C)Provocation (D)Force
Ans: (C)
Explanation: First arises from the second .

5. Melt : Liquid : : Freeze : ?
(A)Ice (B)Condense (C)Solid (D)Crystal
Ans: (C)
Explanation: First is the process of formation of the second .

C Aptitude

noreply@blogger.com (Prabhakaran Balasubramaniam) — Wed, 22 Jun 2011 07:23:00 -0700

Predict the output or error(s) for the following:
1. void main()
{
int const * p=5;
printf("%d",++(*p));
}
Answer:
Compiler error: Cannot modify a constant value.
Explanation:
p is a pointer to a "constant integer". But we tried to change the value of
the "constant integer".

2. main()
{
char s[ ]="man";
int i;
for(i=0;s[ i ];i++)
printf("\n%c%c%c%c",s[ i ],*(s+i),*(i+s),i[s]);
}
Answer:
mmmm
aaaa
nnnn
Explanation:
s[i], *(i+s), *(s+i), i[s] are all different ways of expressing the same idea.
Generally array name is the base address for that array. Here s is the base address. i is the
C Aptitude
12
index number/displacement from the base address. So, indirecting it with * is same as
s[i]. i[s] may be surprising. But in the case of C it is same as s[i].

3. main()
{
float me = 1.1;
double you = 1.1;
if(me==you)
printf("I love U");
else
printf("I hate U");
}
Answer:
I hate U
Explanation:
For floating point numbers (float, double, long double) the values cannot
be predicted exactly. Depending on the number of bytes, the precession with of the value
represented varies. Float takes 4 bytes and long double takes 10 bytes. So float stores 0.9
with less precision than long double.
Rule of Thumb:
Never compare or at-least be cautious when using floating point numbers
with relational operators (== , >, <, <=, >=,!= ) .

4. main()
{
static int var = 5;
printf("%d ",var--);
if(var)
main();
}
Answer:
5 4 3 2 1
Explanation:
When static storage class is given, it is initialized once. The change in the
value of a static variable is retained even between the function calls. Main is also treated
like any other ordinary function, which can be called recursively.

5. main()
{
int c[ ]={2.8,3.4,4,6.7,5};
int j,*p=c,*q=c;
for(j=0;j<5;j++) {
printf(" %d ",*c);
++q; }
for(j=0;j<5;j++){
printf(" %d ",*p);
++p; }
13
}
Answer:
2 2 2 2 2 2 3 4 6 5
Explanation:
Initially pointer c is assigned to both p and q. In the first loop, since only q
is incremented and not c , the value 2 will be printed 5 times. In second loop p itself is
incremented. So the values 2 3 4 6 5 will be printed.

Data Structures Aptitude

noreply@blogger.com (Prabhakaran Balasubramaniam) — Tue, 21 Jun 2011 18:49:00 -0700

1. What is data structure?
A data structure is a way of organizing data that considers not only the items stored, but also their relationship to each other. Advance knowledge about the relationship between data items allows designing of efficient algorithms for the manipulation of data.

2. List out the areas in which data structures are applied extensively?
Compiler Design,
Operating System,
Database Management System,
Statistical analysis package,
Numerical Analysis,
Graphics,
Artificial Intelligence,
Simulation

3. What are the major data structures used in the following areas : RDBMS, Network data model & Hierarchical data model.
RDBMS – Array (i.e. Array of structures)
Network data model – Graph
Hierarchical data model – Trees
4. If you are using C language to implement the heterogeneous linked list, what pointer type will you use?
The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointers for this. So we go for void pointer. Void pointer is capable of storing pointer to any type as it is a generic pointer type.

5. Minimum number of queues needed to implement the priority queue?
Two. One queue is used for actual storing of data and another for storing priorities.

C Programming :: Bitwise Operators

noreply@blogger.com (Prabhakaran Balasubramaniam) — Mon, 20 Jun 2011 06:16:00 -0700

1.In which numbering system can the binary number 1011011111000101 be easily converted to?
A. Decimal system B. Hexadecimal system
C. Octal system D. No need to convert
Answer & Explanation

Answer: Option B

Explanation:

Hexadecimal system is better, because each 4-digit binary represents one Hexadecimal digit.

2.Which bitwise operator is suitable for turning off a particular bit in a number?
A. && operator B. & operator
C. || operator D. ! operator
Answer :

Answer: Option B

3.Which bitwise operator is suitable for turning on a particular bit in a number?
A. && operator B. & operator
C. || operator D. | operator
Answer
Answer: Option D

Java Programming :: Threads

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sun, 19 Jun 2011 06:04:00 -0700

1.What is the name of the method used to start a thread execution?
A. init(); B. start();
C. run(); D. resume();
Answer & Explanation

Answer: Option B

Explanation:

Option B is Correct. The start() method causes this thread to begin execution; the Java Virtual Machine calls the run method of this thread.

Option A is wrong. There is no init() method in the Thread class.

Option C is wrong. The run() method of a thread is like the main() method to an application. Starting the thread causes the object's run method to be called in that separately executing thread.

Option D is wrong. The resume() method is deprecated. It resumes a suspended thread.
2.Which two are valid constructors for Thread?

1. Thread(Runnable r, String name)
2. Thread()
3. Thread(int priority)
4. Thread(Runnable r, ThreadGroup g)
5. Thread(Runnable r, int priority)

A. 1 and 3 B. 2 and 4
C. 1 and 2 D. 2 and 5
Answer & Explanation

Answer: Option C

Explanation:

(1) and (2) are both valid constructors for Thread.

(3), (4), and (5) are not legal Thread constructors, although (4) is close. If you reverse the arguments in (4), you'd have a valid constructor.

Java Programming :: Garbage Collections

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sun, 12 Jun 2011 05:33:00 -0700

1.void start() {
A a = new A();
B b = new B();
a.s(b);
b = null; /* Line 5 */
a = null; /* Line 6 */
System.out.println("start completed"); /* Line 7 */
}

When is the B object, created in line 3, eligible for garbage collection?

A. after line 5
B. after line 6
C. after line 7
D. There is no way to be absolutely certain.
Answer & Explanation

Answer: Option D

Explanation:

Option D is correct. I think there are too many unknowns about the method s and the classes A and B to be able to answer this question with any certainty.

2.class HappyGarbage01
{
public static void main(String args[])
{
HappyGarbage01 h = new HappyGarbage01();
h.methodA(); /* Line 6 */
}
Object methodA()
{
Object obj1 = new Object();
Object [] obj2 = new Object[1];
obj2[0] = obj1;
obj1 = null;
return obj2[0];
}
}

Where will be the most chance of the garbage collector being invoked?

A. After line 9
B. After line 10
C. After line 11
D. Garbage collector never invoked in methodA()
Answer & Explanation

Answer: Option D

Explanation:

Option D is correct. Garbage collection takes place after the method has returned its reference to the object. The method returns to line 6, there is no reference to store the return value. so garbage collection takes place after line 6.

Option A is wrong. Because the reference to obj1 is stored in obj2[0]. The Object obj1 still exists on the heap and can be accessed by an active thread through the reference stored in obj2[0].

Option B is wrong. Because it is only one of the references to the object obj1, the other reference is maintained in obj2[0].

Option C is wrong. The garbage collector will not be called here because a reference to the object is being maintained and returned in obj2[0].

Complicated Declarations

noreply@blogger.com (Prabhakaran Balasubramaniam) — Sat, 11 Jun 2011 07:35:00 -0700

1.What do the following declaration signify?

int *ptr[30];

A. ptr is a pointer to an array of 30 integer pointers.
B. ptr is a array of 30 pointers to integers.
C. ptr is a array of 30 integer pointers.
D. ptr is a array 30 pointers.
Answer & Explanation

Answer: Option B

2.What do the following declaration signify?

char *arr[10];

A. arr is a array of 10 character pointers.
B. arr is a array of function pointer.
C. arr is a array of characters.
D. arr is a pointer to array of characters.
Answer & Explanation

Answer: Option A

3.What do the following declaration signify?

int (*pf)();

A. pf is a pointer to function.
B. pf is a function pointer.
C. pf is a pointer to a function which return int
D. pf is a function of pointer variable.
Answer & Explanation

Answer: Option C

Data Structures Basics

noreply@blogger.com (Prabhakaran Balasubramaniam) — Fri, 10 Jun 2011 05:41:00 -0700

1. What is data structure?

A data structure is a way of organizing data that considers not only the items stored, but also their relationship to each other. Advance knowledge about the relationship between data items allows designing of efficient algorithms for the manipulation of data.

2. List out the areas in which data structures are applied extensively?

Compiler Design,
Operating System,
Database Management System,
Statistical analysis package,
Numerical Analysis,
Graphics,
Artificial Intelligence,
Simulation

3. What are the major data structures used in the following areas : RDBMS, Network data model and Hierarchical data model.

RDBMS = Array (i.e. Array of structures)
Network data model = Graph
Hierarchical data model = Trees

4. If you are using C language to implement the heterogeneous linked list, what pointer type will you use?

The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointers for this. So we go for void pointer. Void pointer is capable of storing pointer to any type as it is a generic pointer type.

5. Minimum number of queues needed to implement the priority queue?

Two. One queue is used for actual storing of data and another for storing priorities.

Flow Control in Java

noreply@blogger.com (Prabhakaran Balasubramaniam) — Thu, 9 Jun 2011 06:10:00 -0700

1.public void foo( boolean a, boolean b)
{
if( a )
{
System.out.println("A"); /* Line 5 */
}
else if(a && b) /* Line 7 */
{
System.out.println( "A && B");
}
else /* Line 11 */
{
if ( !b )
{
System.out.println( "notB") ;
}
else
{
System.out.println( "ELSE" ) ;
}
}
}

A. If a is true and b is true then the output is "A && B"
B. If a is true and b is false then the output is "notB"
C. If a is false and b is true then the output is "ELSE"
D. If a is false and b is false then the output is "ELSE"
Answer & Explanation

Answer: Option C

Explanation:

Option C is correct. The output is "ELSE". Only when a is false do the output lines after 11 get some chance of executing.

Option A is wrong. The output is "A". When a is true, irrespective of the value of b, only the line 5 output will be executed. The condition at line 7 will never be evaluated (when a is true it will always be trapped by the line 12 condition) therefore the output will never be "A && B".

Option B is wrong. The output is "A". When a is true, irrespective of the value of b, only the line 5 output will be executed.

Option D is wrong. The output is "notB".

2. public void test(int x)
{
int odd = 1;
if(odd) /* Line 4 */
{
System.out.println("odd");
}
else
{
System.out.println("even");
}
}

Which statement is true?

A. Compilation fails.
B. "odd" will always be output.
C. "even" will always be output.
D. "odd" will be output for odd values of x, and "even" for even values.
Answer & Explanation

Answer: Option A

Explanation:

The compiler will complain because of incompatible types (line 4), the if expects a boolean but it gets an integer.

Exceptions

noreply@blogger.com (Prabhakaran Balasubramaniam) — Wed, 8 Jun 2011 06:02:00 -0700

1. What will be the output of the program?

public class Foo
{
public static void main(String[] args)
{
try
{
return;
}
finally
{
System.out.println( "Finally" );
}
}
}

A. Finally
B. Compilation fails.
C. The code runs with no output.
D. An exception is thrown at runtime.

Answer & ExplanationAnswer: Option A

Explanation:
If you put a finally block after a try and its associated catch blocks, then once execution enters the try block, the code in that finally block will definitely be executed except in the following circumstances:

An exception arising in the finally block itself.
The death of the thread.
The use of System.exit()
Turning off the power to the CPU.

2. What will be the output of the program?

try
{
int x = 0;
int y = 5 / x;
}
catch (Exception e)
{
System.out.println("Exception");
}
catch (ArithmeticException ae)
{
System.out.println(" Arithmetic Exception");
}
System.out.println("finished");

A. finished B. Exception
C. Compilation fails. D. Arithmetic Exception

Answer & ExplanationAnswer: Option C

Explanation:
Compilation fails because ArithmeticException has already been caught. ArithmeticException is a subclass of java.lang.Exception, by time the ArithmeticException has been specified it has already been caught by the Exception class.

If ArithmeticException appears before Exception, then the file will compile. When catching exceptions the more specific exceptions must be listed before the more general (the subclasses must be caught before the superclasses).

Java Programming :: Flow Control

noreply@blogger.com (Prabhakaran Balasubramaniam) — Mon, 6 Jun 2011 07:50:00 -0700

1.public void foo( boolean a, boolean b)
{
if( a )
{
System.out.println("A"); /* Line 5 */
}
else if(a && b) /* Line 7 */
{
System.out.println( "A && B");
}
else /* Line 11 */
{
if ( !b )
{
System.out.println( "notB") ;
}
else
{
System.out.println( "ELSE" ) ;
}
}
}

A. If a is true and b is true then the output is "A && B"
B. If a is true and b is false then the output is "notB"
C. If a is false and b is true then the output is "ELSE"
D. If a is false and b is false then the output is "ELSE"
Answer & Explanation

Answer: Option C

Explanation:

Option C is correct. The output is "ELSE". Only when a is false do the output lines after 11 get some chance of executing.

Option A is wrong. The output is "A". When a is true, irrespective of the value of b, only the line 5 output will be executed. The condition at line 7 will never be evaluated (when a is true it will always be trapped by the line 12 condition) therefore the output will never be "A && B".

Option B is wrong. The output is "A". When a is true, irrespective of the value of b, only the line 5 output will be executed.

Option D is wrong. The output is "notB".

2.switch(x)
{
default:
System.out.println("Hello");
}

Which two are acceptable types for x?

byte
long
char
float
Short
Long

A. 1 and 3 B. 2 and 4
C. 3 and 5 D. 4 and 6
Answer & Explanation

Answer: Option A

Explanation:

Switch statements are based on integer expressions and since both bytes and chars can implicitly be widened to an integer, these can also be used. Also shorts can be used. Short and Long are wrapper classes and reference types can not be used as variables.