C Language Fundamentals Unit 1 Quiz
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Questions and Answers

What must be considered in the naming of identifiers in C?

  • Identifiers are case-sensitive. (correct)
  • Identifiers can begin with any numeric digit.
  • Identifiers must include at least one numeric digit.
  • Identifiers can have unlimited length.

    • What is the maximum number of significant characters allowed in C identifiers?

  • 64
  • 128
  • 16
  • 32 (correct)

    • Which of the following is NOT a fundamental data type in C?

  • string (correct)
  • double
  • int
  • char

    • Which data type is optimized for storing single precision floating point numbers in C?

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

    How are the storage and interpretation of variables determined in C?

    <p>By the type of variable declared.</p> Signup and view all the answers

    What is the main purpose of the I/O controller?

    <p>To decide process allocation for devices.</p> Signup and view all the answers

    Which function is NOT typically associated with file management in an operating system?

    <p>Controlling system performance.</p> Signup and view all the answers

    What does the operating system use to prevent unauthorized access?

    <p>Security techniques like passwords.</p> Signup and view all the answers

    What aspect of resource management does an operating system handle?

    <p>Both allocation and de-allocation of resources.</p> Signup and view all the answers

    Job accounting by an operating system is primarily concerned with what?

    <p>Tracking time and resources used by jobs.</p> Signup and view all the answers

    Which of the following is an example of a common service provided by an operating system?

    <p>Program execution.</p> Signup and view all the answers

    Which task is NOT performed by an operating system in relation to I/O operations?

    <p>Executing hardware diagnostics.</p> Signup and view all the answers

    How does an operating system manage error detection?

    <p>By producing error messages and debugging aids.</p> Signup and view all the answers

    What is the output of the program that performs an implicit conversion of an integer to a double?

    <p>Implicit value is 20</p> Signup and view all the answers

    What does explicit conversion in C require?

    <p>Use of type casting operator</p> Signup and view all the answers

    In the expression 'x = (float) 7 / 5', what is the purpose of the type casting?

    <p>To produce a float result from an integer operation</p> Signup and view all the answers

    What defines implicit conversions in C language?

    <p>Automatically performed without an operator</p> Signup and view all the answers

    What is a characteristic of usual arithmetic conversions in C?

    <p>Converts lower size type to higher size type</p> Signup and view all the answers

    What happens when an integer is assigned to a double variable in C?

    <p>An implicit conversion takes place</p> Signup and view all the answers

    What is the result of the expression 'p = (short) i' when i is 20?

    <p>Short value is set to 20</p> Signup and view all the answers

    Which statement correctly describes inbuilt typecast functions?

    <p>They facilitate data type conversion</p> Signup and view all the answers

    What does 'call by value' mean in C programming?

    <p>A copy of the argument is passed to the function.</p> Signup and view all the answers

    Which of the following is NOT a fundamental data type in C?

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

    Which of the following correctly describes a 'switch' statement in C?

    <p>It executes code based on the value of a single variable or expression.</p> Signup and view all the answers

    In C, what is the main difference between a structure and a union?

    <p>A structure can hold multiple data types simultaneously, while a union can only hold one at a time.</p> Signup and view all the answers

    What does operator precedence determine in the context of C programming?

    <p>The order in which operators are evaluated in an expression.</p> Signup and view all the answers

    Which loop structure is guaranteed to execute at least once?

    <p>do while loop</p> Signup and view all the answers

    When passed to functions, what advantage do pointers provide in C?

    <p>They allow for the modification of the original variable's value.</p> Signup and view all the answers

    How can multi-dimensional arrays be accessed in C?

    <p>By using multiple nested for loops.</p> Signup and view all the answers

    What type of error occurs when a program abnormally terminates due to incorrect logic, such as division by zero?

    <p>Run-time Error</p> Signup and view all the answers

    Which line is most likely to cause a syntax error in the while loop example provided?

    <p>while(.);</p> Signup and view all the answers

    What will the compiler output when a semicolon is missing in the example provided?

    <p>error: expected ';' before '}'</p> Signup and view all the answers

    What is an example of a run-time error mentioned in the content?

    <p>Division by zero</p> Signup and view all the answers

    What error type is primarily associated with linking different object files?

    <p>Linker Error</p> Signup and view all the answers

    In the absence of a formatted output but proper logic, what type of error might the compiler flag?

    <p>Syntax Error</p> Signup and view all the answers

    What can be inferred about errors that the compiler can catch versus those that arise during execution?

    <p>Run-time errors are typically uncatchable by the compiler.</p> Signup and view all the answers

    Which of the following best describes a syntax error?

    <p>An incorrectly formatted piece of code that cannot compile.</p> Signup and view all the answers

    Study Notes

    Components of C Language

    • C language features fundamental data types including char, int, float, and double.
    • Variables in C correspond to memory locations where data is stored.
    • Understanding type conversion is essential for correct data manipulation.

    Standard I/O in C

    • Standard input/output allows user interaction through functions like printf() and scanf().
    • Control structures such as if, switch, and loops (while, do while, for) facilitate conditional branching and iteration.

    Storage Classes

    • Storage classes in C define variable scope (local or global) and lifetime (automatic, static, external).
    • Knowledge of storage classes is crucial for effective memory management.

    Types of Operators

    • Operators in C include arithmetic, relational, logical, and bitwise operators.
    • Familiarity with operator precedence and associativity is necessary for evaluating complex expressions.

    Functions and Recursion

    • Functions allow modular programming; types include user-defined and library functions.
    • Parameters can be passed by value (creating a copy) or by reference (passing the address).
    • Recursive functions call themselves to solve problems iteratively.

    Arrays and Pointers

    • Arrays (single and multi-dimensional) provide a way to store multiple values in contiguous memory locations.
    • Pointers hold memory addresses, enabling dynamic memory management and efficient array manipulation.
    • Structures and unions are used to group related data, enhancing data organization.

    File Management

    • File systems organize data in directories for easy navigation; an OS manages file data through allocation and deallocation.
    • File management includes tracking file status, resource allocation, and access permissions.

    Error Types in C Programming

    • Syntax Errors: Mistakes in code structure, such as missing semicolons or incorrect syntax.
    • Run-Time Errors: Errors occurring during program execution (e.g., division by zero).
    • Linker Errors: Errors that arise when linking object files post-compilation.

    Identifier Naming Rules

    • C identifiers can include letters, digits, and underscores, with case sensitivity.
    • Up to 32 significant characters are considered in identifiers, with subsequent characters ignored.

    Data Types and Typecasting

    • Fundamental data types in C include char, int, float, and double.
    • Implicit conversion automatically adjusts data types, while explicit conversion requires a cast operator.
    • Common arithmetic conversions promote integer to float conversions when performing calculations.

    Common Services of Operating System

    • Operating systems provide essential services like program execution, file system manipulation, communication, and error detection.
    • Security measures protect against unauthorized access, and job accounting monitors resource usage.

    Algorithm Representation

    • Algorithms can be represented using pseudocode and flowcharts to outline problem-solving steps.
    • Clear algorithm representation aids in translating logical steps into executable code.

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    unit 1.pdf

    Description

    Test your knowledge on the fundamental components of the C language in this Unit 1 quiz. Explore topics like data types, variables, memory locations, type conversion, standard I/O, storage classes, and operators. Perfect for students looking to solidify their understanding of C programming basics.

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