History of C Programming Language
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Questions and Answers

What is the significance of ANSI C standard?

  • It limits the capabilities of C to system software only.
  • It defines the grammar and core libraries for the C language. (correct)
  • It introduces a whole new programming language.
  • It focuses on high-level constructs only.

    • Which organization is responsible for the establishment of the ANSI C standard?

  • American National Standards Institute (ANSI) (correct)
  • Kernighan and Ritchie
  • C9X committee
  • International Standards Organization (ISO)

    • What does the preprocessor section in a C program primarily contain?

  • Main function
  • User-defined functions
  • Header files (correct)
  • Global declarations

    • Why is C considered a highly portable language?

    <p>Code written on one machine can easily run on a different machine.</p> Signup and view all the answers

    Which section of a C program includes the declaration of global variables?

    <p>Global declaration section</p> Signup and view all the answers

    Who proposed the C language at Bell Laboratories in 1972?

    <p>Dennis Ritchie</p> Signup and view all the answers

    Which book, published in 1978, was the first book on C programming?

    <p>The C Programming Language</p> Signup and view all the answers

    What was the primary goal of the committee established by ANSI in 1983 regarding the C language?

    <p>To produce a machine independent definition of C</p> Signup and view all the answers

    Which operating system is most frequently associated with the C programming language?

    <p>UNIX</p> Signup and view all the answers

    Why was UNIX considered one of the first portable operating systems?

    <p>Because C language is not tied to any specific hardware architecture</p> Signup and view all the answers

    Where are local declarations made?

    <p>Within the main function</p> Signup and view all the answers

    Which section of a program contains if, else, while, and for statements?

    <p>Statements</p> Signup and view all the answers

    What does the return function do?

    <p>Ends the execution of the function</p> Signup and view all the answers

    Which file is created by the C compiler after checking for errors in a program file?

    <p>.obj file</p> Signup and view all the answers

    What is the role of the Linker in program execution?

    <p>Links object files to library functions</p> Signup and view all the answers

    What is the purpose of the 'ceil' function in C math?

    <p>Rounds up the given number</p> Signup and view all the answers

    What is the role of identifiers in C programming?

    <p>Name variables and program elements</p> Signup and view all the answers

    Which data type is commonly used to store whole numbers in C programs?

    <p>int</p> Signup and view all the answers

    What should be avoided when naming variables in C programming?

    <p>Starting the identifier with a digit</p> Signup and view all the answers

    Which keyword has a predefined meaning in C language and should not be used as an identifier?

    <p>return</p> Signup and view all the answers

    Which type of variable retains its value between multiple function calls?

    <p>Static variable</p> Signup and view all the answers

    What is the scope of automatic variables in C?

    <p>Limited to the block in which they are defined</p> Signup and view all the answers

    Which storage class in C allocates memory automatically at runtime?

    <p>Automatic</p> Signup and view all the answers

    What is the range of an unsigned char data type in C?

    <p>0 to 255</p> Signup and view all the answers

    Which type of data type is used to store a set of data values in C?

    <p>Derived Data Types</p> Signup and view all the answers

    What is the default initialization value for static variables in C?

    <p>Zero</p> Signup and view all the answers

    How are external variables declared in C to be shared across multiple source files?

    <p>By declaring them as global variables</p> Signup and view all the answers

    What is the purpose of the 'typedef' keyword in C?

    <p>Create user-defined data type names</p> Signup and view all the answers

    Which suffix indicates a 'float' constant in C?

    <p>'f'</p> Signup and view all the answers

    What is the purpose of an Enumeration constant in C?

    <p>Associate constant integer values with names</p> Signup and view all the answers

    What will be printed when the first code snippet is executed?

    <p>garbage garbage garbage</p> Signup and view all the answers

    Which statement about static variables is FALSE?

    <p>All static variables have global visibility.</p> Signup and view all the answers

    In the second code snippet, what will be the output of the code?

    <p>0 0 0.000000(null)</p> Signup and view all the answers

    Which of the following is NOT true regarding register variables?

    <p>Static variables can be stored in the CPU register.</p> Signup and view all the answers

    What does the 'extern' storage class indicate in C programming?

    <p>'extern' variables are declared with an external linkage elsewhere in the program.</p> Signup and view all the answers

    Which type of variable has the fastest access time compared to others?

    <p>'register' variables</p> Signup and view all the answers

    What happens if an external variable is declared multiple times?

    <p>The last declaration is used for linking.</p> Signup and view all the answers

    Which type of variable has limited visibility to the file it's declared in?

    <p>'static' variable</p> Signup and view all the answers

    What is the default initial value of a static integral variable?

    <p>+0</p> Signup and view all the answers

    Which keyword is used to define a static variable?

    <p>static</p> Signup and view all the answers

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