Question
Who discovered the ‘ABO Blood Group
System’?Solution
The ABO blood group system is widely credited to have been discovered by the Austrian scientist Karl Landsteiner, who identified the O, A, and B blood types in 1900. Landsteiner originally described the O blood type as type "C", and in parts of Europe it is rendered as "0" (zero), signifying the lack of A or B antigen. Landsteiner was awarded the Nobel Prize in Physiology or Medicine in 1930 for his work. Alfred von Decastello and Adriano Sturli discovered the fourth type, AB, in 1902.
A PL/SQL `TRIGGER` is a stored program that automatically executes in response to:
Which SQL command is used to retrieve data from a table?
Which SQL clause is used to group rows based on one or more columns?
Which type of attack exploits software bugs to execute arbitrary code on a system?
A system is in a safe state when:
A "diamond" shape in an E-R Diagram typically represents a:
Which of the following is a significant disadvantage of using a traditional file system compared to an RDBMS?
What is a page fault?
What will re.findall(r'\d+', 'abc123def45ghi') return?Â
Which of the following is a type of phishing attack?
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