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I appeared for an interview before Apr 2021.
Round duration - 60 minutes
Round difficulty - Easy
The second round is also written but you need to write programming based on their concept.
Given a positive integer N
, your task is to identify all prime numbers less than or equal to N
.
A prime number is a natural number greater than 1 that has no po...
Determine if a given string 'S' is a palindrome, considering only alphanumeric characters and ignoring spaces and symbols.
The string 'S' should be evaluated in a case...
Round duration - 60 minutes
Round difficulty - Easy
Technical round with questions mainly on Java and OOPS concepts.
Static methods belong to the class itself, while instance methods belong to individual objects of the class.
Static methods are called using the class name, while instance methods are called using object references.
Static methods cannot access instance variables directly, while instance methods can access both static and instance variables.
Static methods are shared among all instances of the class, while instance method...
ClassNotFoundException occurs when a class is not found during runtime, while NoClassDefFoundError occurs when a class was found during compilation but not during runtime.
ClassNotFoundException is a checked exception, while NoClassDefFoundError is an Error.
ClassNotFoundException occurs when a class is not found at runtime, usually due to a missing classpath or incorrect class name.
NoClassDefFoundError occurs when a cla...
Error is a serious issue that cannot be handled at runtime, while Exception is a recoverable issue that can be caught and handled.
Error is a subclass of Throwable and is usually caused by the environment or system, such as running out of memory or stack overflow.
Exception is also a subclass of Throwable but is caused by the application code, such as invalid input or file not found.
Errors are unchecked and are not meant...
SerialVersionUID is a unique identifier used by Java to ensure the compatibility of serialized objects.
SerialVersionUID is a static final long variable in a class that implements Serializable interface.
It is used to ensure that the serialized object can be deserialized correctly even if the class definition has changed.
If the SerialVersionUID of the serialized object does not match the one in the class, an InvalidClass...
Requirements for creating an immutable class in Java
Make the class final so it cannot be extended
Make all fields private and final
Do not provide setter methods, only getter methods
Ensure that mutable objects are not returned in getter methods
Override equals() and hashCode() methods for proper comparison
Consider making defensive copies of mutable fields in constructor or getter methods
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
I appeared for an interview before Apr 2021.
Round duration - 90 minutes
Round difficulty - Easy
It was on online objective test consisting of 4 sections: Aptitude, Technical MCQs, Code snippet based MCQs and Coding part.
Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.
The first line contains an...
Determine if a given singly linked list of integers is a palindrome. Return true
if it is a palindrome, otherwise return false
.
1 -> 2 -> ...
Check if a given singly linked list of integers is a palindrome.
Use two pointers to find the middle of the linked list.
Reverse the second half of the linked list.
Compare the first half with the reversed second half to determine if it is a palindrome.
Round duration - 60 minutes
Round difficulty - Easy
This was a technical and managerial round. The interviewer gave me a situation where I am in testing team and I found that customer requirement was drop down list at a place but developer has used bullet selection, and is not ready to change it. How will you manage? I gave some good replies and he was convinced.
Abstract classes in C++ are classes that cannot be instantiated and are designed to be base classes for other classes.
Abstract classes may contain pure virtual functions, making them incomplete and unable to be instantiated.
Derived classes must implement all pure virtual functions from the abstract class in order to be concrete classes.
Abstract classes can have non-virtual functions and member variables like regular cl...
Round duration - 60 minutes
Round difficulty - Easy
This was also a technical round. He asked to optimize the code I wrote in coding round. Then he asked me a few puzzles and questions on OOPS, OS and DBMS.
Paging and segmentation are memory management techniques in operating systems.
Paging divides physical memory into fixed-size blocks called pages, while segmentation divides logical memory into variable-size segments.
Paging allows for efficient memory allocation and management, while segmentation provides protection and sharing of memory.
Paging is simpler to implement but can lead to internal fragmentation, while segmen...
Concurrency control is a technique used in databases to manage simultaneous access and modification of data by multiple users or processes.
Concurrency control ensures that transactions are executed in a way that maintains data consistency and integrity.
Techniques like locking, timestamp ordering, and optimistic concurrency control are used to implement concurrency control.
For example, in a banking system, concurrency c...
String Buffer is synchronized and thread-safe, while String Builder is not synchronized and faster.
String Buffer is synchronized, making it thread-safe for use in multi-threaded environments.
String Builder is not synchronized, resulting in faster performance but not thread-safe.
String Builder is preferred for single-threaded operations, while String Buffer is preferred for multi-threaded operations.
Smart pointers in C++ are objects that act like pointers but provide automatic memory management.
Smart pointers help prevent memory leaks by automatically managing memory allocation and deallocation.
Examples include unique_ptr, shared_ptr, and weak_ptr.
unique_ptr is used for exclusive ownership, shared_ptr for shared ownership, and weak_ptr to prevent circular references.
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
To check if a directed graph is cyclic or not
Use Depth First Search (DFS) algorithm to traverse the graph
Maintain a visited set to keep track of visited nodes
Maintain a recursion stack to keep track of nodes in the current DFS traversal
If a node is visited and is already in the recursion stack, then the graph is cyclic
If DFS traversal completes without finding a cycle, then the graph is acyclic
Return a random byte from a stream of bytes with equal probability.
Create a variable to store the count of bytes read
Create a variable to store the current random byte
For each byte read, generate a random number between 0 and the count of bytes read
If the random number is 0, store the current byte as the random byte
Return the random byte
Algorithm to find Nth-to-Last element in a singly linked list of unknown length
Traverse the list and maintain two pointers, one at the beginning and one at Nth node from beginning
Move both pointers simultaneously until the second pointer reaches the end of the list
The first pointer will be pointing to the Nth-to-Last element
If N=0, return the last element
Parse the list only once
Print all possible permutations of an array of integers
Use recursion to swap elements and generate permutations
Start with the first element and swap it with each subsequent element
Repeat the process for the remaining elements
Stop when all elements have been swapped with the first element
Print each permutation as it is generated
Design a stack that prints the minimum element pushed in O(1)
Use two stacks, one for storing elements and another for storing minimums
When pushing an element, compare it with the top of minimum stack and push the smaller one
When popping an element, pop from both stacks
To get the minimum element, just return the top of minimum stack
To find the starting point of a loop in a linked list, use Floyd's cycle-finding algorithm.
Use two pointers, one moving at twice the speed of the other.
When they meet, move one pointer to the head of the list and keep the other at the meeting point.
Move both pointers one step at a time until they meet again, which is the starting point of the loop.
To find a number in a matrix where all rows and columns are sorted non-decreasingly. Complexity of the solution.
Use binary search to find the number in each row and column
Start from the top-right corner or bottom-left corner to optimize search
Time complexity: O(m log n) or O(n log m) depending on the starting corner
Program for snake traversal of binary tree
Use a stack to keep track of nodes to be visited
Start with the root node and push it onto the stack
While the stack is not empty, pop a node and print its value
If the level is even, push the left child first and then the right child onto the stack
If the level is odd, push the right child first and then the left child onto the stack
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
Current affairs - relevant things going on in the world especially financial/Fintech domain
I appeared for an interview before Feb 2022.
Yes, I am proficient in Excel and Excel macros.
I have extensive experience in using Excel for data analysis and manipulation.
I am skilled in creating and modifying Excel macros to automate repetitive tasks.
I am familiar with advanced Excel functions such as VLOOKUP, PivotTables, and conditional formatting.
I have used Excel to create charts and graphs to visualize data.
I am comfortable working with large datasets in Exc...
posted on 6 Jun 2023
I applied via Referral and was interviewed before Jun 2022. There were 2 interview rounds.
Cloud technologies offer different services like IaaS, PaaS, and SaaS for varying levels of control and management.
IaaS (Infrastructure as a Service) provides virtualized computing resources over the internet, such as virtual servers and storage.
PaaS (Platform as a Service) offers a platform allowing customers to develop, run, and manage applications without dealing with infrastructure.
SaaS (Software as a Service) deli...
I appeared for an interview in Mar 2023.
Prime Focus Technologies
MapmyIndia
Yodlee
Bravura Solutions