Operators in C Programming
40 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the purpose of an operator in programming?

  • To perform operations (correct)
  • To define functions
  • To declare variables
  • To display output on the screen

    • Which type of operator is used to add two operands?

  • Relational operator
  • Logical operator
  • Assignment operator
  • Arithmetic operator (correct)

    • What does the term 'precedence of operators' refer to?

  • Order of evaluation of operators (correct)
  • Speed of execution
  • Number of operands an operator takes
  • Type of data used in a program

    • In 'int value = 10+20*20;', why is the value 210?

    <p>Multiplicative operator is evaluated before Additive operator</p> Signup and view all the answers

    Which type of operator checks the relationship between two operands?

    <p>Relational operator</p> Signup and view all the answers

    What does the Unary + operator do?

    <p>Finds the absolute value of a number</p> Signup and view all the answers

    Which type of operator is used to assign a value to a variable?

    <p>= operator</p> Signup and view all the answers

    What is the purpose of Turnery or Conditional Operators?

    <p>Make decisions based on conditions</p> Signup and view all the answers

    What is the purpose of the sizeof operator in C?

    <p>To find the memory space allocated for data types</p> Signup and view all the answers

    In C, how is the bitwise AND operator denoted?

    <p>&amp;</p> Signup and view all the answers

    Which operand is greater in the expression 'A' + 2?

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

    What output would be generated by the bitwise OR operator if one operand is 0?

    <p>1</p> Signup and view all the answers

    Which operator is used to perform left shift in C?

    <p>&lt;&lt;</p> Signup and view all the answers

    What is true about the modulo-arithmetic operator in C?

    <p>It operates on integer operands as required</p> Signup and view all the answers

    How are invalid arithmetic expressions often represented?

    <p>With missing operators connecting operands</p> Signup and view all the answers

    What role does the comma operator play in C?

    <p>It links related expressions together</p> Signup and view all the answers

    What is the purpose of the getchar() function in C programming?

    <p>To read a single character from the keyboard</p> Signup and view all the answers

    Which function in C is used to display a character value on the screen or console?

    <p>putchar()</p> Signup and view all the answers

    What will be the output of the code snippet provided?

    <p>Enter a value : this is test You entered: t</p> Signup and view all the answers

    What is the main purpose of the gets() function in C programming?

    <p>To read a single string from the keyboard</p> Signup and view all the answers

    Which format specifier is used for signed integer values in formatted input and output operations?

    <p>%d</p> Signup and view all the answers

    What does the printf() function do in C programming?

    <p>Display any value on the console screen</p> Signup and view all the answers

    Which function can be used to write output to the standard output stream in C?

    <p>printf()</p> Signup and view all the answers

    '%lf' is used in C programming for which type of data?

    <p>Double (floating data)</p> Signup and view all the answers

    What is the first step to convert a given valid C expression to its mathematical form?

    <p>Determine the order in which the operators are bound to their operands</p> Signup and view all the answers

    Which operators have the next highest precedence after unary operators?

    <p>Multiplicative operators</p> Signup and view all the answers

    In the given expression -a+ b * c - d I e + f, what is the associativity of additive operators + and -?

    <p>Left-to-right</p> Signup and view all the answers

    Why does the expression -a-+ -b++ * -c appear invalid?

    <p>The excessive use of operators</p> Signup and view all the answers

    Which operator in C has the highest precedence?

    <ul> <li></li> </ul> Signup and view all the answers

    If a simple expression can be directly converted to its mathematical form, what does it imply?

    <p>The expression is complex</p> Signup and view all the answers

    What does it mean when two operators are said to have 'right-to-left associativity'?

    <p>Operators are bound to their operands from right to left</p> Signup and view all the answers

    Why do we need operator precedence and associativity rules in C expressions?

    <p>To determine the order in which operations are performed</p> Signup and view all the answers

    What is the purpose of the printf() function in C programming?

    <p>Printing values on the console screen</p> Signup and view all the answers

    Which header file contains the pre-defined function printf() in C programming?

    <p>stdio.h</p> Signup and view all the answers

    What is the purpose of using the & symbol in scanf() function in C?

    <p>To store variable values in memory</p> Signup and view all the answers

    Which function prints a string into a character array instead of displaying it on the console screen?

    <p>sprintf()</p> Signup and view all the answers

    In the C programming language, what does sscanf() function do?

    <p>Reads data from strings or arrays</p> Signup and view all the answers

    What happens if a wrong format specifier is used with printf() function?

    <p>It displays garbage values on screen</p> Signup and view all the answers

    Which operator is used to store variable values at their respective memory locations in scanf() function?

    <p>&amp;</p> Signup and view all the answers

    What output would be expected from the given code snippet? C program to implement scanf() function #include int main() { char str; int a = 2, b = 8; sprintf(str, "%d and %d are even number", a, b); printf("%s", str); return 0; }

    <p>&quot;2 and 8 are even numbers&quot;</p> Signup and view all the answers

    Study Notes

    Operators in Programming

    • Operators perform operations on one or more operands in programming languages.
    • The addition operator (+) is used to add two operands together.
    • Precedence of operators determines the order in which operations are processed in expressions.

    Expression Evaluation

    • In the expression int value = 10 + 20 * 20;, multiplication takes precedence, resulting in value being 210 (10 + 400).
    • Relational operators check the relationship between two operands, such as equality or inequality.

    Unary and Assignment Operators

    • The Unary + operator signifies a positive value or operates with a single operand.
    • The assignment operator (=) assigns a value to a variable.

    Conditional and Sizeof Operators

    • The ternary (conditional) operator evaluates a condition and returns one of two values based on the result.
    • The sizeof operator determines the size, in bytes, of a data type or variable in C.

    Bitwise Operators

    • In C, the bitwise AND operator is represented by "&".
    • The output from the bitwise OR operator (|) with a zero operand is the value of the other operand.
    • The left shift operator (<<) shifts bits to the left in C.

    Modulo and Invalid Expressions

    • The modulo operator (%) returns the remainder of a division operation.
    • Invalid arithmetic expressions may appear as syntax errors.

    Comma Operator and Input/Output Functions

    • The comma operator allows two expressions to be evaluated in a single statement, returning the value of the second expression.
    • The getchar() function reads a single character from standard input.
    • The putchar() function displays a character value on the console.

    String and Formatted Input/Output

    • The gets() function reads a string from the input until a newline is encountered.
    • The format specifier '%d' is used for signed integer values in formatted input/output.

    printf() Function

    • The printf() function formats and outputs data to the console.
    • '%lf' is used for specifying double-precision floating-point numbers.

    Expression Conversion and Operator Precedence

    • The first step in converting a valid C expression to its mathematical form involves identifying and grouping operands.
    • Unary operators have the highest precedence, followed by multiplicative and then additive operators (+/-).
    • Operators with right-to-left associativity process from right to left in expressions.

    Function and Header File Usage

    • The scanf() function uses the & symbol to get the memory address of variables for input.
    • sscanf() reads formatted data from a string instead of standard input.
    • A wrong format specifier in printf() may lead to unexpected output or errors.

    Memory Storage and Example Code

    • The memory location storing variable values is managed by the scanf() function through the use of &'s.
    • Example code with sprintf() incorrectly writes into a string due to lacking proper memory allocation, leading to undefined behavior.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge on different types of operators used in C programming, including arithmetic, relational, shift, logical, bitwise, ternary, assignment, and miscellaneous operators. Learn about the precedence of operators in C language.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser