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A Primary Key uniquely identifies each record (or tuple) in a table and cannot contain NULL values. It enforces entity integrity, ensuring that every row in a table has a unique identifier. For example, in a table of employees, an employee ID serves as a primary key, ensuring no duplicate or NULL entries exist. Why Other Options Are Incorrect:
Size of MD5 message digest
Purpose of Scope resolution operator
In deep learning, which type of neural network is most suitable for sequential data like time series?
In a CI/CD pipeline, which of the following represents the most critical failure point that could delay the entire software release cycle?
Which of the following is not a method of inter-process communication (IPC) in modern operating systems?
Which of the following design patterns violates the Open/Closed Principle of SOLID principles in object-oriented design?
Which of the following statements correctly describes a major difference between public and private clouds?
In the context of containerization, what is the role of an orchestration tool?
In a mission-critical network requiring fault tolerance and multiple redundant paths, which of the following topologies provides the highest level of re...