Cracking the C, C++, and Java Interview

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Some directive names require arguments. View answers in details. As we know that c allows us to make functions and cal them where ever needed, it prevents rework by calling the same function again and again where ever requires intead for example if we make a funtion that adds two numbers, it can be called anywhere in the program where ever the addintion is needed and we do not need to code again for adding any number.

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It also shortens the length of the program as we do not need to code again the same thing for next time we can simple call the funtion and use it whenever needed. Keyword Mean In Declaration? This keyword indicated that the function or the variable is implemented externally and it emphasizes that the variable ot the function exits external to the file or function.

We use this keyword when we want to make anything global in the project, it does not lie within any function. Can Union Be Self Referenced? No, Union cannot be self referenced because it shares a single memory for all of its data members. Pointes are special type of variables that are used to store the memory address of the other variables. The auto keyword declares a local variable whose scope remains within the block of code, it is a variable with the local scope. When we declare a variable with the auto keyword it specify that it belongs to an auto storage class.

These variables are visible only within the bolck in which they are declared. These types of variables are not initialised automatically instead need to be initialised xplicitly.

Register keyword signifies that of possible to store variable in the register than store it in register. Variables are usually stored in stacks and are passed to and fro to processor whenever required. Also register keyword when used redused code size which is an important thing in embeded system.

These are the variables which remains visible throughout the program and are not recreated when they are recalled. These types are by default initialised to zero and allocated memory on Data Segment. Static is an access qualifier that limits the scope of the variable but causes the variable to exist for the lifetime of the program. This means a static variable is one that is not seen outside the function in which it is declared as its scopeis limited to the block of code in which it has been created but its lifespan remains until the program terminates.

The value of such a variable will remain and may be seen even after calls to a function also the declaration statement of such type of a variable inside a function is executed only once. The scope of the variable describes that the variable is accessible at certain point in the program or not. The difference between global variables and static variables lies in this concept only.

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The scope of the global variables remains through out the program also the life span of these variables is through out the program. The scope of the static Variables remains within the block of code in which they are created but the life span remains through out the program.

Thus, the main difference is between the scope of both type of variables. First, Global variables are the variables which can be accessed from anywhere through out the program whereas local variables are those which can only be accessed within the block of code in which they are created.

Second, global variables are visible throughout the program whereas local variables are not known to the other functions in the programs i. Third, global variables are allocated memory on Data Segament whereas local variables are allocated memory on the stack. Variables prefixed with the keyword volatile acts as a data type qualifier.

The volatile keyword attempts to alter the default way in which the variables are stored and the way the compiler handles the variables.

Prototype of printf function is: In this the Second parameter: Macros are the identifiers that represent statements or expressions in other words macros are fragment of code which is been given a name. Example, we have define a macro i. Here the macro determines the square of the given number.

Cracking the C, C++, and Java interview

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Cracking The C, C++, And Java Interview

Explore the Home Gift Guide. Amazon Music Stream millions of songs. Amazon Advertising Find, attract, and engage customers. The book comprises of multiple choice questions and questions on programming aptitude and programming theory. In addition, the book has additional information on entry level certification courses and suggested reading.

This book is essential for final year computer science engineers preparing for campus recruitment interviews. Ganesh Samarthyam has over eleven years of working experience in IT industry. He is a consultant in the US based startup Zinemind. Subhash K U is an Indian academic author, teacher and entrepreneur. He completed his electrical engineering and has co-authored this book.

Data Structures Questions 3. Object Oriented Programming Questions. C Problem-solving Questions 6. C Multiple Choice Questions 7. C Programming-aptitude Questions 8.

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