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Questions and Answers
What will be the result of the expression true && false?
What will be the result of the expression true && false?
- true only if both operands are true
- true
- false (correct)
- undefined
Under which condition does the OR operator (||) return false?
Under which condition does the OR operator (||) return false?
- When both operands are false (correct)
- When at least one operand is true
- When one operand is false
- When both operands are true
In the conditional ternary operator, what does the expression evaluate to when the condition is false?
In the conditional ternary operator, what does the expression evaluate to when the condition is false?
- result2 (correct)
- undefined
- result1
- true
What final value does the comma operator return when multiple expressions are evaluated?
What final value does the comma operator return when multiple expressions are evaluated?
Which of the following statements about the && operator is correct?
Which of the following statements about the && operator is correct?
Which expression correctly uses the conditional ternary operator?
Which expression correctly uses the conditional ternary operator?
What is the output of the expression false || true?
What is the output of the expression false || true?
What is a common misconception about the && operator?
What is a common misconception about the && operator?
What is the primary function of the assignment operator '=' in C++?
What is the primary function of the assignment operator '=' in C++?
Which of the following operators cannot be inherited in C++?
Which of the following operators cannot be inherited in C++?
Which operator in C++ is used for logical NOT?
Which operator in C++ is used for logical NOT?
What do relational operators in C++ do?
What do relational operators in C++ do?
Which of the following is NOT a compound assignment operator?
Which of the following is NOT a compound assignment operator?
What are the operators in C++ that perform comparisons called?
What are the operators in C++ that perform comparisons called?
In the expression 'int a = 10;', what does '10' represent?
In the expression 'int a = 10;', what does '10' represent?
What do bitwise operators modify in C++?
What do bitwise operators modify in C++?
Which operator would you use to check if two values are equal in C++?
Which operator would you use to check if two values are equal in C++?
Which operator is used to perform a bitwise AND operation in C++?
Which operator is used to perform a bitwise AND operation in C++?
What is the purpose of the sizeof operator in C++?
What is the purpose of the sizeof operator in C++?
The output of the sizeof operator is returned in which format?
The output of the sizeof operator is returned in which format?
What is the equivalent assembly instruction for the bitwise NOT operator (~)?
What is the equivalent assembly instruction for the bitwise NOT operator (~)?
Which of the following is a true statement about bitwise operators?
Which of the following is a true statement about bitwise operators?
In C++, which operator can be used to shift bits to the right?
In C++, which operator can be used to shift bits to the right?
When nesting sizeof operators in C++, what will the output be?
When nesting sizeof operators in C++, what will the output be?
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Study Notes
C++ Operators
- An operator is a symbol that performs mathematical or logical operations.
- Operators are special functions that accept one or more arguments and return a value.
Assignment operator
- The assignment operator
=copies a value from the right-hand side (rvalue) to the left-hand side (lvalue). - It is the only operator that can be overloaded, but not inherited.
Compound Assignment Operators
- Shorten code by combining assignment with other operators.
- Examples:
+=,-=,*=,/=,%=,>>=,<<=
Relational and Comparison Operators
- Compare values and return a Boolean result (true or false).
- Operators include:
<(less than),>(greater than),<=(less than or equal to),>=(greater than or equal to),==(equal to),!=(not equal to).
Logical Operators
- Combine multiple Boolean expressions.
- Operators include:
!(NOT): Inverts the truth value of an expression.&&(AND): Returns true if both operands are true.||(OR): Returns true if at least one operand is true.
Conditional Ternary Operator
- Evaluates an expression and returns one of two values based on the result.
- Syntax:
condition ? result1 : result2.
Comma Operator
- Separates two or more expressions.
- Evaluates all the expressions and returns the value of the rightmost expression.
Bitwise Operators
- Modify variables by working on their bit patterns.
- Operators include:
&(AND): Performs a bitwise AND operation.|(OR): Performs a bitwise inclusive OR operation.^(XOR): Performs a bitwise exclusive OR operation.~(NOT): Performs a bitwise complement (inverts all bits).<<(Shift left): Shifts bits to the left.>>(Shift right): Shifts bits to the right.
Sizeof Operator
- Calculates the size of a data type or variable.
- Returns the size as an integer.
- Is a keyword and can be nested.
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