Related Questions

Which one of the following functions will you use to check that the class exists before you work with it?
A class_exist()
B class_exists()
C exist()
D exists_class()
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel and $$\varphi $$ = Pressure angle)
A $$\frac{{\left( {{{\text{r}}^2} + {{\text{R}}^2}} \right)\cos \varphi }}{2}$$
B $$\frac{{\left( {{{\text{r}}^2} + {{\text{R}}^2}} \right)\sin \varphi }}{2}$$
C $$\frac{{\left( {{\text{r}} + {\text{R}}} \right)\cos \varphi }}{2}$$
D $$\frac{{\left( {{\text{r}} + {\text{R}}} \right)\sin \varphi }}{2}$$
You use the $_SERVER superglobal and your _______ property to create your path to check.
A $load_dir
B $load
C $save
D $save_dir
Who said, "The State exists because crime exists in society, otherwise there would be no need of a State"?
A Herbert Spencer
B J. S. Mill
C John Locke
D Tocqueville
If you call a method and it doesn’t exist it’ll cause a problem. To check the method which function will you use?
A _method()
B methodexists()
C is_callable()
D is_method()
The coriolis component of acceleration exists whenever a point moves along a path that has
A linear displacement
B rotational motion
C gravitational acceleration
D tangential acceleration
You use the get_class_methods() function to return the names of all the methods in the class. Which function will you use to print it on the screen?
A printf()
B print_ar
C print_r
D echo
'Check whether the windows are locked.' If you rewrite the sentence beginning with 'Make sure that,' what should the next words in the sentence be?
A you are locking the windows
B the windows are locked
C are checking the windows
D you checked that the windows was locked
To check whether a file was uploaded, you look in the _______ superglobal array.
A $_FILES
B $_DOCS
C $_DOCUMENTS
D $_FOLDERS
Which one of the following functions is used to determine whether a class exists?
A exist()
B exist_class()
C class_exist()
D __exist()

Next steps