Amdocs Software Developer Interview Questions, Process, and Tips

Q1. Reverse linked list and general OOPs and linux
Add your answer

90 minutes of technical mcqs and one coding question

Q1. About arrays stacks
Add your answer

Round duration - 90 minutes
Round difficulty - Medium

This was an online coding round where we had 2 questions to solve under 90 minutes . Both the questions were of easy to medium difficulty .

Q1. 
Find First Unique Character in a String
You are given a string S of length N. Your task is to find the index (considering 1-based indexing) of the first unique character in the string. If there are no uni...read more
Ans. 
Find the index of the first unique character in a given string, return -1 if no unique characters are found.
• Create a hashmap to store the frequency of each character in the string.

• Iterate through the string and find the first character with frequency 1.

• Return the index of the first unique character or -1 if no unique characters are found.
Answered by AI
Add your answer
Q2. 
Pythagorean Triplets Detection
Determine if an array contains a Pythagorean triplet by checking whether there are three integers x, y, and z such that x² + y² = z² within the array.
Input:
The first lin...read more
Ans. 
Detect if an array contains a Pythagorean triplet by checking if there are three integers x, y, and z such that x^2 + y^2 = z^2.
• Iterate through all possible triplets of numbers in the array and check if they form a Pythagorean triplet.

• Use a nested loop to generate all possible combinations of three numbers from the array.

• Check if the sum of squares of two numbers is equal to the square of the third number for each trip...read more
Answered by AI
Add your answer

Round duration - 50 Minutes
Round difficulty - Medium

This round consisted of 1 question from DSA with medium level of difficulty and then the rest of the questions were asked from DBMS and OOPS.

Q1. 
Ways To Make Coin Change
Given an infinite supply of coins of varying denominations, determine the total number of ways to make change for a specified value using these coins. If it's not possible to make...read more
Ans. 
The task is to find the total number of ways to make change for a specified value using given denominations.
• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the number of ways to make change for each value up to the specified value.

• Iterate through each denomination and update the array accordingly.

• The final answer will be in the last cell of the array.

• Consider edge cases such as when
Answered by AI
Add your answer
Q2. What are views in SQL?
Ans. 
Views in SQL are virtual tables that are generated based on the result set of a SELECT query.
• Views are used to simplify complex queries by storing them as virtual tables.

• They can be used to restrict access to certain columns or rows of a table.

• Views do not store data themselves, but display data from the underlying tables.

• Changes made to the underlying tables are reflected in the views.

• Example: CREATE VIEW vw_employee
Answered by AI
Add your answer
Q3. How do you take a backup of a table in MySQL?
Ans. 
To take a backup of a table in MySQL, you can use the mysqldump command.
• Use the mysqldump command followed by the database name and table name to backup a specific table.

• You can also specify the username and password for the MySQL server using the -u and -p flags.

• To backup all tables in a database, use the --all-databases flag with the mysqldump command.
Answered by AI
Add your answer
Q4. What is the difference between a constructor and a method in Object-Oriented Programming?
Ans. 
Constructor is a special method used to initialize objects, while a method is a regular function that performs a specific task.
• Constructor is called automatically when an object is created, while a method needs to be called explicitly.

• Constructors have the same name as the class, while methods have unique names.

• Constructors do not have a return type, while methods have a return type.

• Example: Constructor - public ClassN...read more
Answered by AI
Add your answer

Round duration - 50 Minutes
Round difficulty - Medium

This was a mixed round where I was asked to code to Programming questions and later I was asked some important concepts from OOPS and Java . I was also asked the famous Die-Hard Puzzle in this round .

Q1. 
Intersection of Linked List Problem
You are provided with two singly linked lists containing integers, where both lists converge at some node belonging to a third linked list.
Your task is to determine t...read more
Ans. 
Find the node where two linked lists merge.
• Traverse both lists to find the lengths and the last nodes.

• Align the starting points of the longer list with the shorter list.

• Traverse both lists simultaneously until the nodes match.

• Return the data of the matching node or -1 if no merging occurs.
Answered by AI
Add your answer
Q2. 
Palindrome String Validation
Determine if a given string 'S' is a palindrome, considering only alphanumeric characters and ignoring spaces and symbols.
Note:
The string 'S' should be evaluated in a case...read more
Ans. 
Check if a given string is a palindrome after removing special characters, spaces, and converting to lowercase.
• Remove special characters and spaces from the string

• Convert the string to lowercase

• Check if the modified string is a palindrome by comparing characters from start and end
Answered by AI
Add your answer
Q3. How can you measure exactly 4 liters of water using only a 3-liter can and a 5-liter can?
Add your answer
Q4. What is the garbage collector in Java?
Ans. 
Garbage collector in Java is a part of JVM responsible for automatic memory management by reclaiming unused memory.
• Garbage collector is responsible for identifying and deleting objects that are no longer needed in memory.

• It helps in preventing memory leaks and optimizing memory usage.

• Examples of garbage collectors in Java include Serial, Parallel, CMS, G1, and ZGC.
Answered by AI
Add your answer

Round duration - 30 Minutes
Round difficulty - Easy

This is a cultural fitment testing round .HR was very frank and asked standard questions. Then we discussed about my role.

Q1. Why do you want to work at Amdocs?
Add your answer
Q2. Why should we hire you?
Add your answer

Round duration - 120 minutes
Round difficulty - Medium

1. There was a aptitude , technical and coding test which consist of 20 questions of aptitude , 15 questions of reasoning , 20 question of Java/SQL/Unix and 1 of coding question which are quite easy.
2. Timing for online first round exam is sufficient.

Q1. 
First Unique Character in a Stream Problem Statement
Given a string A consisting of lowercase English letters, determine the first non-repeating character at each point in the stream of characters.
Examp...read more
Ans. 
Given a string of lowercase English letters, find the first non-repeating character at each point in the stream.
• Create a hashmap to store the frequency of each character as it appears in the stream.

• Iterate through the stream and check the frequency of each character to find the first non-repeating character.

• Output the first non-repeating character at each point in the stream.
Answered by AI
Add your answer

Round duration - 40 minutes
Round difficulty - Medium

1. Tell me about yourself (Mention your project or training )
2. What is primary key?
3. Difference between delete and truncate.
4. What is normalization?
5. What is Abstract class (Java)?
6. Explain collection in Java.
7. Differentiate between overloading and overriding
8. Explain about your project
9. Puzzle question
10. Real life example of Linked list.(Train)

Round duration - 10 minutes
Round difficulty - Easy

1. Tell me something not there in your resume.
2. Why do you want tp work at amdocs?
3. Do you work well under pressure?
4. Will you relocate in the future?
5. Do you have any question for us?