Challenge for ZEND PHP5 Certification - 038

[hinom 5]

Exercise 38

 

What will be the result of following operation?

 

print 4<< 5;

 

A. 3

B. 128

C. 120

D. 6

[hinom 5]

Answer: B

 

Explanation

 

1. 4 * 2 = 8

2. 8 * 2 = 16

3. 16 * 2 = 32

4. 32 * 2 = 64

5. 64 * 2 = 128

 

http://php.net/language.operators.bitwise