OOPS Common Interview Questions and Answers

What is the difference between procedural and object-oriented programs?- a) In procedural program, programming logic follows certain procedures and the instructions are executed one after another. In OOP program, unit of program is object, which is nothing but combination of data and code. b) In procedural program, data is exposed to the whole program whereas in OOPs program, it is accessible with in the object and which in turn assures the security of the code. What are Encapsulation, Inheritance and Polymorphism?- Encapsulation is the mechanism that binds together code and data it manipulates and keeps both safe from outside interference and misuse. Inheritance is the process by which one object acquires the properties of another object. Polymorphism is the feature that allows...

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C++ Interview Questions and Answers (FAQ)

1. What is virtual constructors/destructors? Virtual destructors: If an object (with a non-virtual destructor) is destroyed explicitly by applying the delete operator to a base-class pointer to the object, the base-class destructor function (matching the pointer type) is called on the object. There is a simple solution to this problem – declare a virtual base-class destructor. This makes all derived-class destructors virtual even though they don’t have the same name as the base-class destructor. Now, if the object in the hierarchy is destroyed explicitly by applying the delete operator to a base-class pointer to a derived-class object, the destructor for the appropriate class is called. Virtual constructor: Constructors cannot be virtual. Declaring a constructor as a virtual function...

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Resume Writing Tricks and Tips

What is a Resume? The word “resume” is a French word meaning “summary”. Often times, you’ll hear a resume referred to as a “vitale”; a Latin word meaning “data about life”. They are both the same thing - a simple, well-organized profile of your experiences and qualifications. A resume is your calling card when you apply for a job. Usually, your resume has to sell an employer on giving you an interview. Interviews get the job; resumes can only get an interview. Very often, personnel people will pattern the interview on the resume they have received from you. Thus, it is essential that you have a resume and that it be a good one. A resume should contain brief but sufficient information to tell a prospective employer: • Who you are • What type of job you would like to do • What you...

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Tricky C interview questions

How do you write a program which produces its own source code as its output? How can I find the day of the week given the date? Why doesn’t C have nested functions? What is the most efficient way to count the number of bits which are set in a value? How can I convert integers to binary or hexadecimal? How can I call a function, given its name as a string? How do I access command-line arguments? How can I return multiple values from a function? How can I invoke another program from within a C program? How can I access memory located at a certain address? How can I allocate arrays or structures bigger than 64K? How can I find out how much memory is available? How can I read a directory in a C program? How can I increase the allowable number of simultaneously open files? What’s wrong with...

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Tricky C interview questions

How do you write a program which produces its own source code as its output? How can I find the day of the week given the date? Why doesn’t C have nested functions? What is the most efficient way to count the number of bits which are set in a value? How can I convert integers to binary or hexadecimal? How can I call a function, given its name as a string? How do I access command-line arguments? How can I return multiple values from a function? How can I invoke another program from within a C program? How can I access memory located at a certain address? How can I allocate arrays or structures bigger than 64K? How can I find out how much memory is available? How can I read a directory in a C program? How can I increase the allowable number of simultaneously open files? What’s...

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