Question

1) Does convex lens give real image
2) Does convex lens give virtual image
3) Does concave lens give real image
4) Does concave lens give virtual image​

Answer 1

A concave lens forms an image that is reduced in size, or smaller than the original object. The image formed is also virtual 

Convex (converging) lenses can form either real or virtual images (cases 1 and 2, respectively), whereas concave (diverging) lenses can form only virtual images (always case 3). Real images are always inverted, but they can be either larger or smaller than the object.