(A) Concave lenses
(B) Convex lenses
(C) Cylindrical lenses
(D) Bifocal lenses
Author:
Optical fibers are based on the phenomenon of?
(A) Dispersion
(B) Diffraction
(C) Interference
(D) Total internal reflection
A mirage occurs because of?
(A) Interference of light
(B) Diffraction of light
(C) Reflection by hot ground
(D) Total internal reflection by layers of air
Among following which is a function of DBMS?
(A) Providing multi users access control
(B) Storing data
(C) Data integrity
(D) All of the above
Among following which is a procedural language?
(A) Tuple relational calculus
(B) Relational algebra
(C) Query language
(D) Domain relational calculus
What is relational calculus?
(A) It is a kind of procedural language
(B) It is a high level language
(C) It is a non-procedural language
(D) It is data definition language