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1) Here is a numerical expression in C: x << 1 containing an unknown number x. If the value of the whole expression x << 1 ) is 42, what is the value of x?

1) Here is a numerical expression in C: x << 1 containing an unknown number x. If the value of the whole expression x << 1 ) is 42, what is the value of x?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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These are bitwise operations using C syntax

**Problem 2 (Bitwise)** **Which number?** 1) Here is a numerical expression in C: `x << 1` containing an unknown number x. If the value of the whole expression `(x << 1)` is 42, what is the value of x? [Input Box] 2) Here are a couple of numerical expressions in C: `x % 5` and `x / 5` containing an unknown number x. If the value of the first expression is 4 and the value of the second is 3, what is the value of x? [Input Box] 3) Here are a couple of numerical expressions in C: `x & 25` and `x | 25`. If the value of the first expression is 17 and the value of the second is 29, what is the numerical value of this expression? Lay out the bit patterns of 25, 17, and 29. Consider the bitwise OR first: this will fix all but three of the bits of x. Considering the bitwise AND will fix the remaining three. [Input Box] **Save** [Button] **Reset** [Button]
Transcribed Image Text:**Problem 2 (Bitwise)** **Which number?** 1) Here is a numerical expression in C: `x << 1` containing an unknown number x. If the value of the whole expression `(x << 1)` is 42, what is the value of x? [Input Box] 2) Here are a couple of numerical expressions in C: `x % 5` and `x / 5` containing an unknown number x. If the value of the first expression is 4 and the value of the second is 3, what is the value of x? [Input Box] 3) Here are a couple of numerical expressions in C: `x & 25` and `x | 25`. If the value of the first expression is 17 and the value of the second is 29, what is the numerical value of this expression? Lay out the bit patterns of 25, 17, and 29. Consider the bitwise OR first: this will fix all but three of the bits of x. Considering the bitwise AND will fix the remaining three. [Input Box] **Save** [Button] **Reset** [Button]
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