Dear Readers, Welcome to C++ Interview questions with answers and explanation. These 73 solved C++ Programming questions will help you prepare for technical interviews and online selection tests during campus placement for freshers and job interviews for professionals. - Simplified view of an object in userâs language is called abstraction.
C++ Interview Questions & Answers What is C++? Released in 1985, C++ is an object-oriented programming language created by Bjarne Stroustrup. C++ maintains almost all aspects of the C language, while simplifying memory management and adding several features - including a new. This blog will cover all important aspects of 'C' 'C++', 'Data Structures in C' and other Technical stuffs. In this blog you will find good C Interview Questions Answers. I will be posting both multiple choice and subjective type C interview questions and answers. Tutorials will be posted from time to time that will focus on problem solving. C Language Questions and Answers Abstract This PDF contains 100+ Q&A on C Language to help you remind yourself of basic concepts and definitions. Especially helpful for Interviews and quick references. IndiaBIX provides you lots of fully solved C Programming interview questions and answers with explanation. Lots of mock tests (sample test, model test) with detailed explanation are given and it would be easy to understand. All students, freshers can download C Programming quiz questions with answers as PDF files and eBooks. Top C Programming Interview Questions: C programming language was developed in between 1969 and 1973 by Dennis Ritchie at Bell Labs. He uses this new programming language for re-implement UNIX operating system. C is a high-level structured oriented programming language use to general purpose programming requirements.
1) Explain what is a class in C++?
A class in C++ can be defined as a collection of function and related data under a single name. It is a blueprint of objects. A C++ program can consist of any number of classes.
2) How can you specify a class in C++?
By using the keyword class followed by identifier (name of class) you can specify the class in C++.
Inside curly brackets, body of the class is defined. It is terminated by semi-colon in the end.
⢠Bool: Variable to store boolean values (true or false)
⢠Char: Variable to store character types ⢠int : Variable with integral values ⢠float and double: Types of variables with large and floating point values
8) What is namespace std; and what is consists of?
Namespace std; defines your standard C++ library, it consists of classes, objects and functions of the standard C++ library. You can specify the library by using namespace std or std: : throughout the code. Namespace is used to differentiate the same functions in a library by defining the name.
9) Explain what is Loop function? What are different types of Loops?
In any programming language, to execute a set of statements repeatedly until a particular condition is satisfied Loop function is used. The loop statement is kept under the curly braces { } referred as Loop body.
In C++ language, three types of loops are used
⢠While loop
⢠For loop ⢠Do-while loop
How to boot a pebuilder iso from ram. The content of winnt.sif is: [SetupData] BootDevice = 'ramdisk(0)' BootPath = ' i386 System32 ' OsLoadOptions = '/noguiboot /fastdetect /minint /rdexportascd /rdpath=PE.ISO' I also put PE.ISO ( which is the original pebuilder.iso, i.e: without the setupldr.bin, ramdisk.sys from windows server 2003 sp2, and no winnt.sif), in the root of pebuilder.iso. When I boot, I can see 'Loading RAMDISK image', then 'Starting Windows XPE [The Hosre Power]', and finally, 'please wait', and it stops, I mean, it always 'please wait' I also tried the setupldr.bin and ramdisk.sys from windows server 2003 sp1, but it doesn't work.
10) Explain how functions are classified in C++ ?
In C++ functions are classified as
11) Explain what are Access specifiers in C++ class? What are the types?
Access specifiers determine the access rights for the statements or functions that follow it until the end of class or another specifier is included. Access specifiers decide how the members of the class can be accessed. There are three types of specifiers
⢠Private
⢠Public ⢠Protected
12) Explain what are Operators and explain with an example?
Operators are specific operands in C++ that is used to perform specific operations to obtain a result. The different types of operators available for C++ are Assignment Operator, Compound Assignment Operator, Arithmetic Operator, Increment Operator and so on.
For example arithmetic operators, you want to add two values a+b
Elixir industries power converter. On executing this code it will give the result likeï Greeting message: Hello
14) Explain what is a reference variable in C++?
A reference variable is just like a pointer with few differences. It is declared using & Operator. In other words, reference is another name for an already existing variable.
15) Explain what is Polymorphism in C++?
Polymorphism in C++ is the ability to call different functions by using only one type of the function call. Polymorphism is referred to codes, operations or objects that behave differently in a different context.
For example, the addition function can be used in many contests like
⢠5+5 ï Integer addition
⢠Medical+Internship ï The same ( + ) operator can be used with different meaning with strings ⢠3.14 + 2.27 ï The same ( + ) operator can be used for floating point addition
16) Explain what is data abstraction in C++?
Data abstraction is a technique to provide essential information to the outside world while hiding the background details. Here in below example you donât have to understand how cout display the text âHello guru99â on the user screen and at the same time implementation of cout is free to change
For example,
The problem that arises during execution of a program is referred as exceptional handling. The exceptional handling in C++ is done by three keywords.
⢠Try: It identifies a block of code for which particular exceptions will be activated
⢠Catch: The catch keyword indicates the catching of an exception by an exception handler at the place in a program ⢠Throw: When a problem exists while running the code, the program throws an exception
18) Explain what is data encapsulation in C++?
Encapsulation is an object oriented programming concept (oops) which binds together the data and functions. It is also referred as data hiding mechanism.
19) Mention what are the types of Member Functions?
The types of member functions are
⢠Simple functions
⢠Static functions ⢠Const functions ⢠Inline functions ⢠Friend functions
20) Mention what are the decision making statements in C++? Explain if statement with an example?
The decision making statements in C++ are
⢠if statement
⢠switch statement ⢠conditional operator C Language Interview Questions With Answers
For example, we want to implement if condition in C++
⢠Process-based: It handles the concurrent execution of the program
⢠Thread-based: It deals with the concurrent execution of pieces of the same program
22) Explain what is upcasting in C++?
Upcasting is the act of converting a sub class references or pointer into its super class reference or pointer is called upcasting.
23) Explain what is pre-processor in C++?
Pre-processors are the directives, which give instruction to the compiler to pre-process the information before actual compilation starts.
C Programming Interview Questions Answers Pdf Free Download
24) Explain what is COPY CONSTRUCTOR and what is it used for?
C Programming Questions And Answers
COPY CONSTRUCTOR is a technique that accepts an object of the same class and copies its data member to an object on the left part of the assignment.
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