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Dayforce Interview Questions and Answers
6 Interview questions
A singleton is a design pattern that restricts the instantiation of a class to one object.
Singleton pattern ensures that a class has only one instance and provides a global point of access to it.
Commonly used in scenarios where only a single instance of a class is needed, such as database connections or logging.
Implemented by creating a static method in the class that returns the same instance every time it is cal...
Cross join is a type of join operation in SQL that returns the Cartesian product of two tables.
Cross join combines each row from the first table with every row from the second table.
It does not require any matching condition like other types of joins.
Cross join can result in a large number of rows if the tables being joined have many rows.
Example: SELECT * FROM table1 CROSS JOIN table2;
Active Directory is a directory service developed by Microsoft for Windows domain networks.
Centralized database for managing network resources
Stores information about users, computers, and other network objects
Allows for authentication, authorization, and access control
Facilitates single sign-on for users across network services
Main method in Java is the entry point for any Java program. It is the method where the program starts execution.
Main method must be declared as public, static, and void.
It must accept an array of strings as an argument.
It is the method where the program starts execution.
Example: public static void main(String[] args) { }
OOPs concept in Java stands for Object-Oriented Programming, which focuses on creating objects that interact with each other.
OOPs concept involves the use of classes and objects
Encapsulation, Inheritance, Polymorphism, and Abstraction are key principles of OOPs
Example: Creating a class 'Car' with properties like 'make', 'model', and methods like 'startEngine', 'drive'
Different cloud options include public, private, hybrid, and multi-cloud solutions.
Public cloud: services provided over the internet by third-party providers (e.g. AWS, Azure, Google Cloud)
Private cloud: dedicated infrastructure for a single organization, offering more control and security (e.g. VMware, OpenStack)
Hybrid cloud: combination of public and private clouds, allowing data and applications to be shared be...
Dayforce Interview Experiences
3 interviews found
Anonymous
Selected
I applied via Indeed and was interviewed before Aug 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Differences of var and let
- Ans.
var is function scoped, let is block scoped in JavaScript
var is function scoped, let is block scoped
var can be redeclared, let cannot be redeclared
let is recommended for variable declaration in modern JavaScript
- Q2. What is singleton
- Ans.
A singleton is a design pattern that restricts the instantiation of a class to one object.
Singleton pattern ensures that a class has only one instance and provides a global point of access to it.
Commonly used in scenarios where only a single instance of a class is needed, such as database connections or logging.
Implemented by creating a static method in the class that returns the same instance every time it is called.
(2 Questions)
- Q1. What is cross join
- Ans.
Cross join is a type of join operation in SQL that returns the Cartesian product of two tables.
Cross join combines each row from the first table with every row from the second table.
It does not require any matching condition like other types of joins.
Cross join can result in a large number of rows if the tables being joined have many rows.
Example: SELECT * FROM table1 CROSS JOIN table2;
- Q2. Diffrences of class and struct
- Ans.
Classes are reference types with inheritance and access specifiers, while structs are value types with no inheritance and public access by default.
Classes are reference types, while structs are value types
Classes support inheritance, while structs do not
Classes have access specifiers like public, private, protected, while structs are public by default
Skills evaluated in this interview
Java javascript sql aptitude related questions
(2 Questions)
- Q1. What is OOPs concept in java?
- Ans.
OOPs concept in Java stands for Object-Oriented Programming, which focuses on creating objects that interact with each other.
OOPs concept involves the use of classes and objects
Encapsulation, Inheritance, Polymorphism, and Abstraction are key principles of OOPs
Example: Creating a class 'Car' with properties like 'make', 'model', and methods like 'startEngine', 'drive'
- Q2. What is Main method in java?
- Ans.
Main method in Java is the entry point for any Java program. It is the method where the program starts execution.
Main method must be declared as public, static, and void.
It must accept an array of strings as an argument.
It is the method where the program starts execution.
Example: public static void main(String[] args) { }
Skills evaluated in this interview
I applied via Company Website and was interviewed in Feb 2024. There was 1 interview round.
(2 Questions)
- Q1. Compare different cloud options that are available
- Ans.
Different cloud options include public, private, hybrid, and multi-cloud solutions.
Public cloud: services provided over the internet by third-party providers (e.g. AWS, Azure, Google Cloud)
Private cloud: dedicated infrastructure for a single organization, offering more control and security (e.g. VMware, OpenStack)
Hybrid cloud: combination of public and private clouds, allowing data and applications to be shared between...
- Q2. Explain active directory
- Ans.
Active Directory is a directory service developed by Microsoft for Windows domain networks.
Centralized database for managing network resources
Stores information about users, computers, and other network objects
Allows for authentication, authorization, and access control
Facilitates single sign-on for users across network services
Interview Preparation Tips
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I applied via Company Website and was interviewed before Oct 2019. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. 1. Core Java - OOPS features, Abstract classes and Interface, Inner Classes, String and Object Class, Equals and HashCode methods, Runtime and Compile time exception, Method overloading and overriding, Cus...
Interview Preparation Tips
2. Basic DB queries
3. Basic Unix commands
I applied via Naukri.com and was interviewed in Mar 2020. There were 4 interview rounds.
Interview Questionnaire
2 Questions
- Q1. What is web service flow
- Ans.
Web service flow is the sequence of steps involved in the communication between a client and a server over the internet.
Web service flow involves a client sending a request to a server
The server processes the request and sends a response back to the client
The response can be in various formats such as XML, JSON, or plain text
Web service flow can be synchronous or asynchronous
Examples of web services include RESTful API...
- Q2. How to check ports in Solaris or linux machine
- Ans.
To check ports in Solaris or Linux machine, use the netstat command.
Open the terminal and type 'netstat -an' to display all open ports.
Use 'netstat -an | grep
' to check if a specific port is open. To check listening ports, use 'netstat -an | grep LISTEN'.
For Solaris, use 'netstat -an | grep .
' instead of '| grep '.
Interview Preparation Tips
Skills evaluated in this interview
Interview Preparation Tips
Skill Tips: Try to be very good at this subject if you are targeting this company. Challenging algorithm questions were also asked but they were not too hard. A fine knowledge of Java could give you an edge over other candidates.
Skills: VmWare mainly focuses on Operating System.
College Name: NIT SURATHKAL
I appeared for an interview before Mar 2021.
(2 Questions)
Round duration - 45 minutes
Round difficulty - Medium
Technical Interview round with questions on DSA.
- Q1.
Reverse Words in a String: Problem Statement
You are given a string of length
N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o... - Ans.
Reverse words in a string while handling leading, trailing, and multiple spaces.
Split the input string by spaces to get individual words
Reverse the order of the words
Join the reversed words with a single space in between
Handle leading, trailing, and multiple spaces appropriately
- Q2.
Reverse a Stack Using Recursion
You are given a stack of integers. Your task is to reverse the stack using recursion without using any extra space other than the internal stack space used due to recursion...
- Ans.
Reverse a stack using recursion without using any extra space other than the internal stack space.
Use recursion to pop all elements from the original stack and store them in function call stack.
Once the stack is empty, push the elements back in reverse order.
Base case of recursion should be when the original stack is empty.
(2 Questions)
Round duration - 45 minutes
Round difficulty - Medium
Technical Interview round with questions on DSA.
- Q1.
Convert a Binary Tree to its Mirror Tree
Given a binary tree, convert this binary tree into its mirror tree. A binary tree is a tree in which each parent node has at most two children. The mirror of a bin...
- Ans.
Convert a binary tree to its mirror tree by interchanging left and right children of all non-leaf nodes.
Traverse the binary tree in a recursive manner.
Swap the left and right children of each non-leaf node.
Continue this process until all nodes have been processed.
- Q2.
Remove Nth Node from End of Linked List
You are given a singly linked list with 'N' nodes, each containing integer data, and an integer 'K'. Your goal is to remove the 'K'th node counting from the end of ...
- Ans.
Remove the Kth node from the end of a singly linked list.
Use two pointers approach to find the Kth node from the end.
Handle edge cases like removing the head node or removing the last node.
Update the pointers to remove the Kth node and reconnect the list.
Round duration - 30 minutes
Round difficulty - Easy
Typical Managerial round.
Interview Preparation Tips
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.
Skills evaluated in this interview
Interview Preparation Tips
College Name: NIT SURATHKAL
I appeared for an interview before Mar 2021.
(4 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview round with questions based on DSA, OOPS and puzzles.
- Q1.
Reverse Linked List Problem Statement
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
Input:
The first line of input is an intege... - Ans.
Reverse a singly linked list by altering the links between nodes.
Iterate through the linked list and reverse the links between nodes
Use three pointers to keep track of the current, previous, and next nodes
Update the links between nodes until the end of the list is reached
- Q2.
Reverse Number Problem Statement
Ninja is exploring new challenges and desires to reverse a given number. Your task is to assist Ninja in reversing the number provided.
Note:
If a number has trailing ze...
- Ans.
Implement a function to reverse a given number, omitting trailing zeros.
Create a function that takes an integer as input and reverses it while omitting trailing zeros
Use modulo and division operations to extract digits and reverse the number
Handle cases where the reversed number has leading zeros by omitting them
Ensure the reversed number is within the constraints specified
- Q3.
Reverse the String Problem Statement
You are given a string
STRwhich contains alphabets, numbers, and special characters. Your task is to reverse the string.Example:
Input:
STR = "abcde"
Output:
"e...
- Ans.
Reverse a given string containing alphabets, numbers, and special characters.
Iterate through the string from end to start and append each character to a new string.
Use built-in functions like reverse() or slicing to reverse the string.
Handle special characters and numbers while reversing the string.
Ensure to consider the constraints provided in the problem statement.
- Q4. What is overloading in the context of Object-Oriented Programming (OOP)?
- Ans.
Overloading in OOP is the ability to define multiple methods with the same name but different parameters.
Overloading allows multiple methods with the same name but different parameters to coexist in a class.
The compiler determines which method to call based on the number and type of arguments passed.
Example: having multiple constructors in a class with different parameter lists.
(6 Questions)
Round duration - 60 minutes
Round difficulty - Medium
Technical round with question based on Web Dev, Cloud Computing, Networking etc.
- Q1. What is TELNET?
- Ans.
TELNET is a network protocol used to establish a connection with a remote computer over a network.
TELNET stands for Telecommunication Network.
It allows a user to log in to a remote computer and execute commands as if they were directly connected to that computer.
TELNET operates on port 23.
It is not secure as the data is transmitted in plain text.
SSH (Secure Shell) is a more secure alternative to TELNET.
- Q2. What is the difference between TELNET and SSH?
- Ans.
TELNET is insecure, while SSH is secure for remote access to servers.
TELNET sends data in plain text, while SSH encrypts data for secure communication
SSH uses public-key cryptography for authentication, TELNET does not
SSH provides secure remote access to servers, TELNET does not prioritize security
TELNET operates on port 23, while SSH operates on port 22
- Q3.
Problem: Sort an Array of 0s, 1s, and 2s
Given an array/list
ARRconsisting of integers where each element is either 0, 1, or 2, your task is to sort this array in increasing order.Input:
The input sta...
- Ans.
Sort an array of 0s, 1s, and 2s in increasing order.
Use a three-pointer approach to partition the array into sections of 0s, 1s, and 2s.
Iterate through the array and swap elements based on their values.
Time complexity should be O(n) to meet the constraints.
- Q4. What is a hypervisor?
- Ans.
A hypervisor is a software that creates and runs virtual machines on a physical host machine.
Hypervisors allow multiple operating systems to run on a single physical machine
They provide isolation between virtual machines
Examples include VMware ESXi, Microsoft Hyper-V, and KVM
- Q5. Can you explain cloud computing in layman’s terms?
- Ans.
Cloud computing is like renting a computer over the internet instead of owning one.
Cloud computing allows users to access and store data and applications over the internet instead of on their own physical computer.
It offers scalability, flexibility, and cost-effectiveness as users can easily adjust their storage and computing needs.
Examples include services like Amazon Web Services (AWS), Microsoft Azure, and Google Cl...
- Q6. What are the stages in the Software Development Life Cycle?
- Ans.
The stages in the Software Development Life Cycle include planning, design, development, testing, deployment, and maintenance.
1. Planning: Define project scope, requirements, and timelines.
2. Design: Create architecture, UI/UX, and database design.
3. Development: Write code based on design specifications.
4. Testing: Verify functionality, performance, and security.
5. Deployment: Release the software to users or clients.
...
(3 Questions)
Round duration - 60 minutes
Round difficulty - Medium
Technical Interview round with questions based on DSA and OOPS. A detailed discussion on my projects was also carried out.
- Q1.
Common Elements in Three Sorted Arrays
Given three sorted arrays
A,B, andCof lengthsN,M, andKrespectively, your task is to find all elements that are present in all three arrays.Input:
The first... - Ans.
Find common elements in three sorted arrays and output them in order.
Iterate through all three arrays simultaneously using three pointers.
Compare elements at pointers and move pointers accordingly.
If elements are equal, add to result and move all pointers forward.
If elements are not equal, move pointer of smallest element forward.
- Q2. What is a volatile variable?
- Ans.
A volatile variable is a variable that can be modified by multiple threads simultaneously.
Volatile variables are used in multithreading to ensure visibility of changes made by one thread to other threads.
They are not cached in thread's local memory, but always read from main memory.
They are typically used for flags or status variables that are accessed by multiple threads.
Example: 'volatile boolean flag = true;'
- Q3. Can you explain the concept of multithreading in Java?
- Ans.
Multithreading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.
Multithreading allows multiple threads to run concurrently within a single process.
Threads share the same memory space, allowing for efficient communication and data sharing.
Java provides built-in support for multithreading through the Thread class and Runnable interface.
Example: Creating a new thread using ...
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
Interview Preparation Tips
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.
Skills evaluated in this interview
I appeared for an interview before Mar 2021.
(2 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Need to write working code on a shared document so that the interviewer can see if you can put your ideas into code. In this round, they are not bothered about time complexity of your algorithm. They just wanted to know if you can code whatever you think. So if you do not find best solution also it is OK but write the code for average case at-least.
- Q1.
Problem: Search In Rotated Sorted Array
Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer
Qqueries. Each query is represented by an integerQ[i], and you must ... - Ans.
Search for integers in a rotated sorted array efficiently.
Use binary search to find the pivot point where the array is rotated.
Based on the pivot point, apply binary search on the appropriate half of the array.
Return the index of the integer if found, else return -1.
Time complexity should be O(logN) for each query.
- Q2.
Pair Sum in Binary Search Tree
Given a Binary Search Tree (BST) and a target value 'K', determine if there exist two unique elements in the BST such that their sum equals the target 'K'.
Explanation:
A ...
- Ans.
Check if there exist two unique elements in a BST that sum up to a target value 'K'.
Traverse the BST in-order to get a sorted array of elements.
Use two pointers approach to find the pair sum in the sorted array.
Consider edge cases like duplicate elements or negative values.
Time complexity can be optimized to O(n) using a HashSet to store visited nodes.
(5 Questions)
Round duration - 60 minutes
Round difficulty - Medium
I was interviewed for vcloud team so they asked me questions on Cloud, DSA etc.
- Q1.
Reverse List In K Groups Problem Statement
You are provided with a linked list having 'N' nodes and an integer 'K'. Your task is to reverse the linked list in groups of size K. If the list is numbered fro...
- Ans.
Reverse a linked list in groups of size K
Iterate through the linked list in groups of size K
Reverse each group of nodes
Handle cases where the last group may have fewer than K nodes
- Q2.
Reverse Stack with Recursion
Reverse a given stack of integers using recursion. You must accomplish this without utilizing extra space beyond the internal stack space used by recursion. Additionally, you ...
- Ans.
Reverse a given stack of integers using recursion without using extra space or loops.
Use recursion to pop all elements from the original stack and store them in function call stack
Once the stack is empty, push the elements back in reverse order using recursion
Use the top(), pop(), and push() methods to manipulate the stack
- Q3. What is cloud computing?
- Ans.
Cloud computing is the delivery of computing services over the internet, including storage, databases, networking, software, and more.
Cloud computing allows users to access resources on-demand without the need for physical infrastructure.
Examples of cloud computing services include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform.
Cloud computing offers scalability, flexibility, cost-effectiveness, ...
- Q4. What are the benefits of cloud computing?
- Ans.
Cloud computing offers scalability, cost-efficiency, flexibility, and improved collaboration.
Scalability: Easily scale resources up or down based on demand without the need for physical infrastructure.
Cost-efficiency: Pay only for the resources you use, reducing upfront costs and maintenance expenses.
Flexibility: Access data and applications from anywhere with an internet connection, enabling remote work and collaborat...
- Q5. What are the challenges of cloud computing?
- Ans.
Challenges of cloud computing include security concerns, data privacy issues, and potential downtime.
Security concerns: Data breaches and unauthorized access are major risks in cloud computing.
Data privacy issues: Ensuring compliance with regulations like GDPR can be challenging when data is stored in the cloud.
Potential downtime: Dependence on internet connectivity and cloud service providers can lead to downtime affe...
Interview Preparation Tips
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.
Skills evaluated in this interview
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