CoolInterview.com - World's Largest Collection of Interview Questions & Answers, FAQs, queries, sample papers, exam papers, dumps, what, why, how, where, when questions
Our Services
Get 9,000 Interview Questions & Answers in an eBook.




Get it now !!
Send your Resume to 6000 Companies

Search Interview Questions

Question: What is the difference between a.Equals(b) and a == b?

Answer: a=b is used for assigning the values (rather then comparison) and a==b is for comparison.

Or
a == b is used to compare the references of two objects
a.Equals(b) is used to compare two objects
Or

a equals b -> copies contents of b to a
a == b -> checks if a is equal to b



Category DotNet Interview Questions & Answers - Exam Mode / Learning Mode
Rating (0.6) By 554 users
Added on 12/21/2010
Views 5832
Rate it!
Question: What is the difference between a.Equals(b) and a == b?
Answer:

a=b is used for assigning the values (rather then comparison) and a==b is for comparison.

Or
a == b is used to compare the references of two objects
a.Equals(b) is used to compare two objects
Or

a equals b -> copies contents of b to a
a == b -> checks if a is equal to b
Source: CoolInterview.com


a==b is same as the symbol = used in mathematics Source: CoolInterview.com

Answered by: R.Karunakaran | Date: 11/29/2009 | Contact R.Karunakaran Contact R.Karunakaran

a.Equals(b) handles NULL values

a==b does not handle NULL values.It will throw NULL Reference Exception. Source: CoolInterview.com

Answered by: Abhijeet N. Pawar | Date: 1/21/2010 | Contact Abhijeet N. Pawar Contact Abhijeet N. Pawar

a==b used to compare the reference of the object

a.equals(b) used to compare the values
For string comparison a.equals(b) is prefered

Source: CoolInterview.com

Answered by: esakkirajak | Date: 2/25/2010 | Contact esakkirajak Contact esakkirajak

equal is best b'coz it contain 1 byte memory rather than compare(==)which cover 4 byte memory Source: CoolInterview.com

Answered by: rajni | Date: 3/31/2010 | Contact rajni Contact rajni

a==b is used to compare the references of two objects
a.equals(b)is used to compare twoobjects Source: CoolInterview.com

Answered by: jajala venkatamuni | Date: 4/9/2010 | Contact jajala venkatamuni Contact jajala venkatamuni

a==b is to compare the references of two objects.
a.equals(b) is used to compare the objects (value of fields within the objects).

ie., If a and b are the objects of a class named class1 which is having two Fields Name and Age, the a.equals(b) will compare the values Name and Age fields value of this two objects.
Source: CoolInterview.com

Answered by: Kannan | Date: 4/14/2010 | Contact Kannan Contact Kannan

a==b is used to compare the references of two objects
a.equals(b)is used to compare twoobjects Source: CoolInterview.com

Answered by: Rohit SIngh | Date: 6/28/2010 | Contact Rohit SIngh Contact Rohit SIngh

a=b->is for assigning values
a==b->is for comparing Source: CoolInterview.com

Answered by: Nagendran | Date: 7/20/2010 | Contact Nagendran Contact Nagendran

a==b can be used for all datatypes where as a.Equals(b) can be used to string .

a==b will produce null reference Exception if either of values is Null
a.Equals(b) will not produce any Exception Source: CoolInterview.com

Answered by: Arif | Date: 8/6/2010 | Contact Arif Contact Arif


If you have the better answer, then send it to us. We will display your answer after the approval

Rules to Post Answers in CoolInterview.com:-

  • There should not be any Spelling Mistakes.
  • There should not be any Gramatical Errors.
  • Answers must not contain any bad words.
  • Answers should not be the repeat of same answer, already approved.
  • Answer should be complete in itself.

Post your answer here

Inform me about updated answers to this question.
Related Questions
View Answer
How does the lifecycle of Windows services differ from Standard EXE?
View Answer
What is a Windows Service and how does its lifecycle differ from a ?standard? EXE?
View Answer
What is CLR?
View Answer
Explain the differences between Server-side and Client-side code?
View Answer
What type of code (server or client) is found in a Code-Behind class?
View Answer
Should validation (did the user enter a real date) occur server-side or client-side? Why?
View Answer
What does the EnableViewState Means?
View Answer
What is the difference between Servers? Transfer and Response. Redirect? Why would I choose one over the other?
View Answer
Can you give an example of when it would be appropriate to use a web service as opposed to a non-serviced .NET component
View Answer
Can you explain the difference between an ADO.NET Dataset and an ADO Recordset?
View Answer
Can you give an example of what might be best suited to place in the Application Start and Session Start subroutines?
View Answer
What are ASP.NET Web Forms? How is this technology different than what is available though ASP (1.0-3.0)?
View Answer
How does VB.NET/C# achieve polymorphism?
View Answer
How would you implement inheritance using VB.NET/C#?
View Answer
Whats an assembly ..?
View Answer
Describe the difference between inline and code behind - which is best in a loosely coupled solution.
View Answer
How would you implement inheritance using VB.NET/C#?
View Answer
Explain what a diffgram is, and a good use for one
View Answer
Where would you use an iHTTPModule, and what are the limitations of any approach you might take in implementing one
View Answer
Can you explain what inheritance is and an example of when you might use it?
View Answer

Please Note: We keep on updating better answers to this site. In case you are looking for Jobs, Pls Click Here Vyoms.com - Best Freshers & Experienced Jobs Website.

View All DotNet Interview Questions & Answers - Exam Mode / Learning Mode




India News Network
Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
Cache = 0.046875 Seconds