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Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order. Merge sort is a divide and conquer algorithm that divides the input array into two halves, recursively sorts the two halves, and then merges the sorted halves.
Bubble sort has a time complexity of O(n^2) in worst case scenario, while merge sort has a time complexity ...
The Like function is used in SQL to search for a specified pattern in a column.
Used in SQL to search for a specified pattern in a column
Can use wildcards like % and _ for pattern matching
Example: SELECT * FROM table WHERE column LIKE 'abc%'
Group by is a clause in SQL used to arrange identical data into groups based on one or more columns.
Group by is used in conjunction with aggregate functions like COUNT, SUM, AVG, etc.
It is commonly used to summarize data and perform calculations on grouped data.
For example, SELECT department, COUNT(employee_id) FROM employees GROUP BY department;
Cloud technology refers to the use of remote servers hosted on the internet to store, manage, and process data.
Allows for on-demand access to a shared pool of resources
Enables scalability and flexibility for businesses
Examples include Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform
Corecard Software interview questions for popular designations
Joins are used in databases to combine rows from two or more tables based on a related column between them.
Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
INNER JOIN returns rows when there is at least one match in both tables
LEFT JOIN returns all rows from the left table and the matched rows from the right table
RIGHT JOIN returns all rows from the right table and the matched rows from the left t...
I applied via Naukri.com and was interviewed in May 2022. There were 3 interview rounds.
I applied via Campus Placement and was interviewed in Aug 2022. There was 1 interview round.
A virtual function is a function in a base class that is overridden by a derived class, allowing polymorphic behavior.
Virtual functions are used in object-oriented programming to achieve runtime polymorphism.
They are declared in the base class with the 'virtual' keyword and can be overridden in derived classes.
When a virtual function is called through a base class pointer or reference, the appropriate derived class fun...
Operator overloading is the ability to redefine operators for user-defined types.
Allows operators to be used with user-defined types
Can simplify code and make it more readable
Examples include overloading the + operator for string concatenation
Function overreading refers to the ability of a function to read beyond the end of an array.
Function overreading can lead to security vulnerabilities and crashes.
It can occur when a function does not properly check the bounds of an array before accessing its elements.
For example, if an array has 10 elements and a function tries to access the 11th element, it may read data from an unintended memory location.
This can be ...
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