Apnapaisa Interview Questions and Answers

Concatenate the largest digit from three numbers to form a new number.

• Find the largest digit in each number 'A', 'B', and 'C'.

• Concatenate the largest digits in the order 'A', 'B', and 'C' to form the new number.

• Return the final concatenated number as the output.

Retrieve the second highest salary from a database table

• Use a SQL query with ORDER BY and LIMIT to retrieve the second highest salary

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1, 1

The time taken for the clock to tick from 8'o clock to 11'o clock is 105 seconds.

• Each tick represents 1/8th of an hour (45 minutes) on the clock.

• From 8'o clock to 11'o clock, there are 3 hours, so the total time taken is 3 * 45 = 135 minutes = 135 * 60 = 8100 seconds.

• The time taken for the clock to tick from 8'o clock to 11'o clock is 8100 - 35 = 8065 seconds.

Use SQL query to select a particular column from a table and get the count of entries.

• Use SELECT statement to specify the column you want to retrieve.

• Use COUNT() function to get the count of entries in that column.

• Combine both in a single query to achieve the desired result.

Encapsulation is a mechanism in Java that binds data and methods together, hiding the internal details of an object.

• Encapsulation helps in achieving data hiding and abstraction.

• It allows the object to control its own state and behavior.

• Data members are made private and accessed through public methods (getters and setters).

• Encapsulation provides better maintainability, flexibility, and security.

• Example: Class with private variables and public methods to access and modify them.

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

• Inheritance is a fundamental concept in object-oriented programming.

• It promotes code reusability and allows for the creation of hierarchical relationships between classes.

• The class that is being inherited from is called the superclass or parent class, while the class that inherits is called the subclass or child class.

• The subclass can access the public and protected members of the supercla...read more

Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.

• Allows a class to inherit properties and behaviors from another class

• Promotes code reusability and reduces redundancy

• Derived class can add its own unique attributes and methods

• Example: Class 'Car' can inherit from class 'Vehicle' and gain attributes like 'color' and methods like 'drive'

Reverse a string using array manipulation

• Create an array of characters from the input string

• Iterate through the array in reverse order and append each character to a new string

• Return the reversed string