Java operators — which two expressions are equivalent among the following? 1) 3/2 2) 3

Q: Java operators — which two expressions are equivalent among the following? 1) 3/2 2) 3<2 3) 34 4) 3<<2 Assume integer arithmetic and Java precedence.

Introduction / Context:This question compares basic arithmetic with shift operations to see which yield the same result for constant integers, reinforcing that left shift by n multiplies by 2^n for non-overflowing operands.Given Data / Assumptions:All literals are int.Left shift by 2 equals multiply by 4 when no overflow occurs.Concept / Approach:Evaluate each expression: integer division truncates, comparison yields boolean, multiplication is straightforward, and left shift scales by a power of two. Compare the numeric outcomes for equality.Step-by-Step Solution:1) 3/2 → integer division → 1.2) 33) 34 → 12.4) 3Thus, 3 and 4 are equivalent.Verification / Alternative check:Binary form: 3 is 0b0011; shifting left by 2 → 0b1100 = 12, matching 3*4.Why Other Options Are Wrong:Options with 1 or 2 cannot equal 12; 1 is 1 and 2 is boolean.Common Pitfalls:Forgetting that is arithmetic scaling for non-overflowing positive ints; also mixing boolean and numeric expressions.Final Answer:3 and 4

Question

Java operators — which two expressions are equivalent among the following?  1) 3/2 2) 3<2 3) 34 4) 3<<2  Assume integer arithmetic and Java precedence.

Accepted Answer

Introduction / Context:This question compares basic arithmetic with shift operations to see which yield the same result for constant integers, reinforcing that left shift by n multiplies by 2^n for non-overflowing operands.Given Data / Assumptions:All literals are int.Left shift by 2 equals multiply by 4 when no overflow occurs.Concept / Approach:Evaluate each expression: integer division truncates, comparison yields boolean, multiplication is straightforward, and left shift scales by a power of two. Compare the numeric outcomes for equality.Step-by-Step Solution:1) 3/2 → integer division → 1.2) 33) 34 → 12.4) 3Thus, 3 and 4 are equivalent.Verification / Alternative check:Binary form: 3 is 0b0011; shifting left by 2 → 0b1100 = 12, matching 3*4.Why Other Options Are Wrong:Options with 1 or 2 cannot equal 12; 1 is 1 and 2 is boolean.Common Pitfalls:Forgetting that is arithmetic scaling for non-overflowing positive ints; also mixing boolean and numeric expressions.Final Answer:3 and 4

Operators and Assignments Questions

Questions

Practice smarter