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Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.
Array is a static data structure with a fixed size, while ArrayList is a dynamic data structure that can grow or shrink in size.
Arrays can hold primitive data types and objects, while ArrayList can only hold objects.
Arrays are faster than ArrayList for accessing elements, but ArrayList is more flexible and easier to work ...
Encapsulation, Inheritance, and Polymorphism are the OOP concepts used in POM.
Encapsulation: Encapsulating web elements and their related methods in page classes
Inheritance: Extending base page class to create specific page classes
Polymorphism: Using method overriding in page classes
Index in SQL is a data structure that improves the speed of data retrieval operations on a database table.
Indexes are created on columns in a database table to quickly retrieve data based on the values in those columns.
They can be unique or non-unique, clustered or non-clustered.
Examples of indexes include primary keys, foreign keys, and indexes created for frequently searched columns.
Dynamic means constantly changing or active.
Constantly changing or evolving
Active or lively
Responsive to input or stimuli
Opposite of static or fixed
Examples: Dynamic websites that update in real-time, dynamic pricing in e-commerce
Merge two sorted arrays a and b into a single sorted array
Create a new array to store the merged result
Use two pointers to iterate through arrays a and b, comparing elements and adding the smaller one to the result array
Handle cases where one array is longer than the other by appending the remaining elements to the result array
The behavior of the equal method in an overridden method will change.
When the equal method is incremented in an overridden method, the comparison logic will be different from the parent class.
This can lead to unexpected behavior if not implemented correctly.
Make sure to thoroughly test the new equal method to ensure it functions as intended.
The method will no longer be considered as an override and will be treated as a new method.
The method will no longer have the same signature as the method it is supposed to override.
The compiler will not throw any error as it will treat the method as a new method.
The superclass method will be called instead of the overridden method.
A generic collection in Java is a collection that can hold objects of any data type.
Generic collections are defined with a type parameter that specifies the type of objects it can hold.
Examples of generic collections in Java include ArrayList
Using generic collections helps ensure type safety and avoids the need for explicit type casting.
I applied via Company Website and was interviewed in Jul 2024. There was 1 interview round.
Yes, the super keyword can be used in the same constructor method.
The super keyword is used to call the constructor of the parent class.
It is commonly used to initialize the parent class's instance variables.
Example: super(parameter1, parameter2);
The method will no longer be considered as an override and will be treated as a new method.
The method will no longer have the same signature as the method it is supposed to override.
The compiler will not throw any error as it will treat the method as a new method.
The superclass method will be called instead of the overridden method.
A generic collection in Java is a collection that can hold objects of any data type.
Generic collections are defined with a type parameter that specifies the type of objects it can hold.
Examples of generic collections in Java include ArrayList
Using generic collections helps ensure type safety and avoids the need for explicit type casting.
The behavior of the equal method in an overridden method will change.
When the equal method is incremented in an overridden method, the comparison logic will be different from the parent class.
This can lead to unexpected behavior if not implemented correctly.
Make sure to thoroughly test the new equal method to ensure it functions as intended.
Index in SQL is a data structure that improves the speed of data retrieval operations on a database table.
Indexes are created on columns in a database table to quickly retrieve data based on the values in those columns.
They can be unique or non-unique, clustered or non-clustered.
Examples of indexes include primary keys, foreign keys, and indexes created for frequently searched columns.
Encapsulation, Inheritance, and Polymorphism are the OOP concepts used in POM.
Encapsulation: Encapsulating web elements and their related methods in page classes
Inheritance: Extending base page class to create specific page classes
Polymorphism: Using method overriding in page classes
Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.
Array is a static data structure with a fixed size, while ArrayList is a dynamic data structure that can grow or shrink in size.
Arrays can hold primitive data types and objects, while ArrayList can only hold objects.
Arrays are faster than ArrayList for accessing elements, but ArrayList is more flexible and easier to work with.
Dynamic means constantly changing or active.
Constantly changing or evolving
Active or lively
Responsive to input or stimuli
Opposite of static or fixed
Examples: Dynamic websites that update in real-time, dynamic pricing in e-commerce
Merge two sorted arrays a and b into a single sorted array
Create a new array to store the merged result
Use two pointers to iterate through arrays a and b, comparing elements and adding the smaller one to the result array
Handle cases where one array is longer than the other by appending the remaining elements to the result array
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I applied via Monster and was interviewed before Apr 2020. There was 1 interview round.
posted on 14 May 2018
A generic swap function swaps two values of any data type.
The function should take two parameters of any data type.
Use a temporary variable to store the value of one parameter.
Assign the value of the second parameter to the first parameter.
Assign the value of the temporary variable to the second parameter.
Search for an element in a rotated sorted linked list.
Find the pivot point where the list is rotated.
Divide the list into two sublists based on the pivot point.
Perform binary search on the appropriate sublist.
Handle edge cases such as empty list and list with only one element.
Search an element in a rotated sorted array
Find the pivot point where the array is rotated
Divide the array into two sub-arrays based on pivot point
Perform binary search on the appropriate sub-array
Repeat until element is found or sub-array size is 1
Given a Sudoku board, find possible numbers for an empty cell.
Iterate through empty cells and check possible numbers using row, column, and box constraints.
Use a set to keep track of possible numbers for each empty cell.
Return the set of possible numbers for the given empty cell.
Find integer average of 4 unsigned integers without typecasting
Add all the integers and divide by 4
Use bit shifting to divide by 4
Handle overflow by using long long data type
Use unsigned int data type for input
Code to identify 32 bit or 64 bit architecture of a processor
Check if the operating system is 32 bit or 64 bit
If OS is 32 bit, processor is 32 bit
If OS is 64 bit, check if processor supports 64 bit architecture
Use CPUID instruction to check if processor supports 64 bit architecture
Convert binary number to base 64 integer
Divide the binary number into groups of 6 bits
Convert each group of 6 bits to decimal
Map the decimal value to the corresponding base 64 character
Concatenate the base 64 characters to form the final integer
Creating test cases for random scenarios ensures software reliability and robustness through diverse input validation.
Identify edge cases: Test with minimum and maximum input values, e.g., an empty array vs. a large array.
Use random data: Generate random inputs to simulate real-world usage, e.g., random user names or passwords.
Test invalid inputs: Ensure the system handles unexpected inputs gracefully, e.g., negative n...
I applied via Referral
posted on 15 Nov 2015
I applied via Campus Placement
Print all downward paths from any node in a binary tree with sum of elements equal to N.
Traverse the binary tree and keep track of the sum of elements in the path from root to current node.
If the sum equals N, print the path from root to current node.
Recursively traverse the left and right subtrees with updated sum.
Use a stack to keep track of the current path being traversed.
Example: Binary tree with root 1, left chil...
Yes, it is possible to get the accurate result from the given data.
The coordinates (i,j,k) where metallic balls are present can be determined by finding the set elements in both matrix1 and matrix2.
Additional data is not required as the given data is sufficient to determine the coordinates.
The coordinates can be obtained by iterating through the elements of matrix1 and matrix2 and checking for set elements.
posted on 15 Nov 2015
Backend server code for a tic tac toe game
Create a RESTful API using a framework like Express.js
Implement game logic to check for winning conditions
Use a database to store game state and user information
Handle user authentication and authorization
Implement real-time updates using WebSockets
Program to store and reconstruct a tree from a file with efficient techniques.
Use a recursive approach to traverse the tree and write each node to the file
Include information about the node's parent and children in the file
Use a unique identifier for each node to reconstruct the tree from the file
Use a data structure like a hash table to store the nodes and their identifiers for efficient reconstruction
Some of the top questions asked at the TransImpact Senior Qa Software Tester interview -
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