What is positive check of authorization?

What is negative check of authorization?

Does String is thread safe in Java?

Does String is thread safe in Java?

Can we use String in switch case?

What are different ways to create String Object?

Which among the following is the fundamental quantity
?
(a) Volume
(b) Time
(c) Velocity
(d) Force

For which Diode is used ?
(a)modulation
(b)oscillation
(c)amplification
(d)purification

For which Diode is used ?
(a)modulation
(b)oscillation
(c)amplification
(d)purification

Which among the following types of coal produces most
heat per unit?
(a) Coal
(b) Lignite
(c) Anthracite
(d) Pit

Which among the following waves is used for
communication by artificial satellites ?
(a)Microwaves
(b)Radio waves
(c)A. M.
(d)Frequency of 101 series