Interview Questions and Answers

Use a stored procedure in SQL to find the maximum salary in a database table.

• Create a stored procedure that selects the maximum salary from the table.

• Use the MAX() function in SQL to find the maximum salary value.

• Execute the stored procedure to retrieve the maximum salary.

Oops stands for Object-Oriented Programming. Polymorphism is the ability of a function to behave differently based on the object it is called with.

• Oops is a programming paradigm that uses objects and classes to design applications.

• Polymorphism allows a function to take different forms based on the object it is called with.

• Example: Inheritance is a form of polymorphism where a subclass can override a method from its superclass.

OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.

• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the nece...read more

OOPs concepts include inheritance, polymorphism, encapsulation, and abstraction. SQL is a language used to manage databases.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects to take on multiple forms.

• Encapsulation is the practice of hiding data and methods within a class.

• Abstraction is the process of hiding complex implementation details and only showing the necessary information.

• SQL is used to create, modify, and quer...read more

Reverse an array of strings

• Create a new array and iterate through the original array in reverse order, adding each element to the new array

• Use built-in array methods like reverse() or spread operator for a more concise solution

• Alternatively, you can swap elements from start to end and end to start until you reach the middle of the array

Sorting algorithm is a method to arrange elements in a specific order.

• Sorting algorithms can be categorized as comparison-based or non-comparison-based.

• Examples of sorting algorithms include Bubble Sort, Merge Sort, and Quick Sort.

• Efficiency of sorting algorithms is measured in terms of time complexity and space complexity.