Automatic Data Processing (ADP) Application Developer Interview Questions and Answers

Q1. Difference between class & interface
Ans. 
Classes can have both implementation and data members, while interfaces can only have method signatures.
• Classes can have constructors, interfaces cannot.

• Classes can have access modifiers for their members, interfaces cannot.

• A class can implement multiple interfaces, but can only inherit from one class.

• Interfaces are used to achieve abstraction and multiple inheritance in Java.

• Example: Class 'Animal' can have methods li...read more
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Q1. About current project
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Q1. Valid Anagrams was asked
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Q2. Make a pattern logic
Ans. 
Create a pattern logic using arrays of strings
• Start by defining the pattern you want to create

• Use loops and conditional statements to generate the pattern

• Test the pattern with different inputs to ensure it works correctly
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Q1. Questions about internships, Projects were asked
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Q1. Stacks queues data structures
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Asked QRE question and some query questions

Q1. Introduce yourself
Ans. 
I am a passionate application developer with experience in creating innovative solutions for various industries.
• Experienced in developing web and mobile applications using languages such as Java, JavaScript, and Swift

• Proficient in database management and integration with applications

• Strong problem-solving skills and ability to work in a team environment

• Familiar with Agile development methodologies and continuous integr
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Q2. What are the technology you are familiar with
Ans. 
I am familiar with a variety of technologies including Java, Python, SQL, HTML, CSS, JavaScript, and Git.
• Java

• Python

• SQL

• HTML

• CSS

• JavaScript

• Git
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Q1. No of days workers do like A works 10 days B works 10 days
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Q2. Graph based question
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Q1. Merge two sorted arrays
Ans. 
Merge two sorted arrays into a single sorted array
• Create a new array to store the merged result

• Use two pointers to iterate through both arrays and compare elements

• Add the smaller element to the new array and move the pointer for that array
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Q2. Max heap based question
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Q1. Maximum length of subarray of given sum
Ans. 
Find the maximum length of a subarray with a given sum in an array.
• Use a hashmap to store the running sum and its corresponding index.

• Iterate through the array and update the hashmap with the running sum.

• Check if the difference between the current sum and the target sum exists in the hashmap to find the subarray length.
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Q2. Oops implementation question not theory question
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Parent and Child Trees

Q1. Random Pointer Linked List
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Q2. Find area using co ordinates
Ans. 
Calculate the area of a shape using coordinates
• Determine the type of shape (e.g. rectangle, triangle, circle)

• Use the appropriate formula for the shape to calculate the area

• Input the coordinates into the formula to get the area
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There were 2 coding questions and 8 mcq
level - HIGH

Q1. Detailed OOPS concepts
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Q2. Questions on CLOUD technologies
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Q3. Discussion on projects
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Q1. Asked me about which field i am more comfortable I said dbms thorough discussion on different concepts of DBMS also some queries
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