AKGVG & Associates Interview Questions and Answers

Program to demonstrate method overloading and overriding

• Method overloading is when multiple methods have the same name but different parameters

• Method overriding is when a subclass provides its own implementation of a method already defined in the superclass

• Method overloading is resolved at compile-time while method overriding is resolved at runtime

The query to get the second highest salary in a given table.

• Use the SELECT statement to retrieve the salary column from the table.

• Sort the salaries in descending order using the ORDER BY clause.

• Use the LIMIT clause to limit the result to the second row.

• Finally, retrieve the second highest salary from the result.

Call by reference and call by value are two ways of passing arguments to a function.

• Call by value passes a copy of the argument to the function, while call by reference passes a reference to the original argument.

• In call by value, changes made to the argument inside the function do not affect the original value, while in call by reference, changes made to the argument inside the function affect the original value.

• Call by value is used for simple data types like integers and f...read more

To delete a file in Python, use the os.remove() method.

• Import the os module

• Use os.remove() method to delete the file

• Specify the file path as the argument to os.remove() method

Program to sort an array of strings

• Use built-in sort function

• Implement bubble sort or insertion sort

• Consider time complexity

Lambda expression is an anonymous function that can be passed as an argument or returned as a value.

• Lambda expressions are used in functional programming languages like Java, Python, and C#.

• They are often used to simplify code and make it more concise.

• Lambda expressions can be used to implement functional interfaces, which have a single abstract method.

• Lambda expressions can also be used with streams to perform operations on collections of data.

• Example: (x, y) -> x + y is a l...read more

Pointers are variables that store memory addresses of other variables.

• Pointers allow direct access to memory locations.

• They can be used to pass values between functions.

• Pointers can be used to create dynamic data structures.

• Example: int *ptr; ptr = # *ptr = 10;

• Example: void swap(int *a, int *b) { int temp = *a; *a = *b; *b = temp; }