C Programming Operators

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Questions and Answers

What is the result of a Bitwise AND operation when both bits have a value of 1?

Null

Undefined

1 (correct)

How are the operations carried out in Bitwise AND, OR, and XOR?

Randomly

Dependently

Independently (correct)

Sequentially

What is the result of a Bitwise OR operation when none of the bits have a value of 1?

0 (correct)

Undefined

Null

What is the result of a Bitwise EXCLUSIVE OR operation when both bits have a value of 1?

0 Signup and view all the answers

What is the purpose of the second operand in Bitwise shift operations?

Indicates the number of displacements Signup and view all the answers

How many Bitwise shift operators are there?

2 Signup and view all the answers

What is the purpose of parentheses in arithmetic expressions?

To group expressions and alter the evaluation hierarchy Signup and view all the answers

Which of the following input/output functions returns a single character from a standard input device?

getchar() Signup and view all the answers

What is the order of evaluation preference for arithmetic operators in C?

*, /, %, +, - Signup and view all the answers

What is the purpose of the scanf() function?

To read formatted input Signup and view all the answers

Which of the following is an unformatted input function?

gets() Signup and view all the answers

What is the role of the hierarchy rules in the evaluation of arithmetic expressions?

To determine the order of evaluation Signup and view all the answers

What is the result of the expression `c = 13 >> 2`?

3 Signup and view all the answers

What is the purpose of the bitwise complement operator (~) in C?

To switch all the bits in a binary pattern Signup and view all the answers

What is the output of the statement `printf("a value is %d", ++a);` when `a = 5`?

a value is 6 Signup and view all the answers

What is the order of evaluation of expressions in a comma operator?

Left to right Signup and view all the answers

What is the purpose of the ternary operator (?:)?

To act as a conditional statement (if-else) Signup and view all the answers

What is the purpose of the sizeof operator in C?

To determine the size of a data type or variable in bytes Signup and view all the answers

How many categories can bitwise operators be divided into?

Three Signup and view all the answers

What is the result of the expression `i = (j = 3, j + 2)`?

i = 5 Signup and view all the answers

What is the output of the statement `(a > b? printf("a is larger") : printf("b is larger"));` when `a = 5` and `b = 3`?

a is larger Signup and view all the answers

What is the effect of the postfix increment operator `a++` on the value of `a`?

It increments the value of <code>a</code> after the statement is executed Signup and view all the answers

What is an expression in C programming?

A collection of data objects and operators that can be evaluated to lead a single new data object Signup and view all the answers

What is the name of the operator that operates on each bit of data?

Bitwise operator Signup and view all the answers

What is the general form of an assignment statement?

variable name = arithmetic expression Signup and view all the answers

What is the primary function of conditional statements?

To make decisions based on conditions Signup and view all the answers

What happens when the condition in an if statement is false?

The statements are skipped and execution continues with the next statements Signup and view all the answers

What is the purpose of the if-else statement?

To execute one of two statements based on a condition Signup and view all the answers

What is the general structure of an if statement?

if (condition) { statement; } Signup and view all the answers

What is the function of the switch statement?

To execute one of multiple statements based on a value Signup and view all the answers

Study Notes

Bitwise Operators

Bitwise AND (&) returns 1 if both bits have a value of 1, otherwise, it returns 0.
Bitwise OR (|) returns 1 if one or more of the bits have a value of 1, otherwise, it returns 0.
Bitwise EXCLUSIVE OR (^) returns 1 if one of the bits has a value of 1 and the other has a value of 0, otherwise, it returns 0.

Bitwise Shift Operations

Shift left (<<) and shift right (>>) operators require two operands: the bit pattern to be shifted and the number of displacements.
The shift operators are used to shift the bits of a binary pattern to the left or right.

Arithmetic Expressions

Evaluation of arithmetic expressions follows the hierarchy rules governed by the C compiler.
The hierarchy rules are:
Scan the expression from left to right.
Evaluate the operators *, /, % first, then +, -.
Use parentheses to overcome the precedence rules.

Input/Output Functions

Input/output functions can be accessed from anywhere within a program by writing the function name followed by a list of arguments enclosed in parentheses.
Some input/output functions do not require arguments, but the empty parentheses must still appear.
Examples of input/output functions include scanf(), getchar(), gets(), printf(), putchar(), and puts().

Bitwise Complement

The bitwise complement operator (~) switches all the bits in a binary pattern, i.e., all 0's become 1's and all 1's become 0's.

Comma Operator

A set of expressions separated by commas is a valid construction in C language.
The expressions are evaluated from left to right.

Size of Operator

The size of operator (sizeof) gives the size of the data type or variable in terms of bytes occupied in the memory.

Expressions

An expression is a collection of data objects and operators that can be evaluated to lead to a single new data object.
Examples of expressions include arithmetic expressions, conditional expressions, and bitwise expressions.

Conditional Operator (Ternary Operator)

The conditional operator (?:) is called ternary because it uses three expressions.
The ternary operator acts like an if-else construction.
The syntax is: (expression-1 ? expression-2 : expression-3).

Conditional Statements

Conditional statements are used for decision making.
Examples of conditional statements include if, if-else, nested if-else, switch, and conditional operator.
The if statement is used to express conditional expressions.
The if-else statement is used to execute one of the two statements depending on the value of the expression.

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Description

Test your understanding of increment, decrement, and conditional operators in C programming with these examples. Learn how to use them correctly in your code. Practice with these exercises to improve your C programming skills.