Quiz -2 Arithmetic Expressions Evaluation in C

What is the operator precedence of the multiplication (*) operator in C?

• Multiplication (*) operator has a higher precedence

• Multiplication (*) operator has the same precedence as addition (+) operator

• Multiplication (*) operator has a lower precedence

• Multiplication (*) operator has the lowest precedence

Explain the concept of operator associativity with an example involving addition and subtraction operators.

• In the expression 10 + 5 - 3, both addition and subtraction operators are evaluated simultaneously, resulting in an error.

• In the expression 10 + 5 - 3, the subtraction operator is evaluated first, resulting in 2. Then, the addition operator is evaluated, resulting in a final answer of 12.

• In the expression 10 + 5 - 3, the addition operator is evaluated first, resulting in 15. Then, the subtraction operator is evaluated, resulting in a final answer of 12.

• Operator associativity only applies to multiplication and division, not addition and subtraction.

Evaluate the arithmetic expression: 5 * 2 + 3 - 1

• 15

• 10

• 7

• 12

How do parentheses affect the evaluation of arithmetic expressions in C?

• They are used to group subexpressions and ensure they are evaluated first.

• They are used to concatenate strings

• They are used to subtract the operands inside them

• They are used to multiply the operands inside them

What is the result of the expression: 4 * (3 + 2) / 2

• 8

• 10

• 12

• 6

Discuss the role of unary operators in arithmetic expressions.

• Unary operators in arithmetic expressions are used to perform operations on individual numbers, such as negation (-) or increment/decrement (++/--). They act on a single operand and have a higher precedence than binary operators.

• Unary operators are only used in logical expressions

• Unary operators are used to perform operations on multiple operands

• Unary operators have lower precedence than binary operators

Simplify the expression: -2 * -3 + 5

• -1

• 15

• 7

• 11

Explain the difference between prefix and postfix unary operators.

• Postfix operators are used for incrementing values.

• Prefix operators are placed after the operand.

• Prefix unary operators are placed before the operand, such as ++x, while postfix unary operators are placed after the operand, such as x++.

• Postfix operators are placed before the operand.

Evaluate the expression: 10 / 2 * 3

• 12

• 20

• 5

• 15

What is the associativity of the assignment operator (=) in C?

• inside-out

• right-to-left

• left-to-right

• top-to-bottom