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Technical Interview Questions and Answers :: C

    Question :: 11
    Other than in a for statement, when is the comma operator used?
    Answer:

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    Question :: 12
    What is the difference between declaring a variable and defining a variable?
    Answer:

    Declaring a variable is initializing a variable where as defining a variable is defining what variables you are initialized.



     

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    Tags:TCS Capgemini

    Question :: 13
    What is a static variable?
    Answer:

    By default the value unchanged means we can give as static.
    Variable which is declared as static and no further initialisation then static variable takes value from zero.

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    Question :: 14
    What is a register variable?
    Answer:

    Register variables are a special case of automatic variables. Automatic variables are allocated storage in the memory of the computer; however, for most computers, accessing data in memory is considerably slower than processing in the CPU. These computers often have small amounts of storage within the CPU itself where data can be stored and accessed quickly. These storage cells are called registers.

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    Question :: 15
    Where is an auto variable stored?
    Answer:

    Each program is allocated two types of storage stack and heap .Auto variables are also known as local variable
    and  are stored in stack.

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    Question :: 16
    What is scope & storage allocation of extern and global variables?
    Answer:

    Scope: it defines the life time of a variable depends on declaration of a variable.If it is declared inside the variable it is local variable,If it is outside it is global variable.
    Extern variables: belong to the External storage class and are stored in the main memory

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    Question :: 17
    What is scope & storage allocation of register, static and local variables?
    Answer:

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    Question :: 18
    What are storage memory, default value, scope and life of Automatic and Register storage class?
    Answer:

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    Question :: 19
    What is memory leak?
    Answer:

    a failure in a program to release discarded memory, causing impaired performance or failure.



     

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    Question :: 20
    What is the difference between 'break' and 'continue' statements?
    Answer:

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