Questions

The interviewer asks the queries to interviewee to know the interest of an individual. This is because if an individual has more interest in a particular part, then there will be more chances of getting a job in an area of interest and specialization. The employer wants to know you're serious about pursuing a career in fashion. Companies spend a lot of time and money training employees, so before they make that investment, they want to make sure you're not just applying for a job in the industry on a whim.

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer.

The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

Candidate Key – A Candidate Key can be any column or a combination of columns that can qualify as unique key in database. There can be multiple Candidate Keys in one table. Each Candidate Key can qualify as Primary Key. 

Primary Key – A Primary Key is a column or a combination of columns that uniquely identify a record. Only one Candidate Key can be Primary Key.

• One needs to be very careful in selecting the Primary Key as an incorrect selection can adversely impact the database architect and future normalization. For a Candidate Key to qualify as a Primary Key, it should be Non-NULL and unique in any domain.

There are many isotopes of uranium and all of them have same atomic number i.e, sum of nmber of neutrons and protons.