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24/7 Customer Software Developer Intern Interview Questions and Answers for Freshers

Updated 16 Sep 2021

24/7 Customer Software Developer Intern Interview Experiences for Freshers

1 interview found

I appeared for an interview before Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 90 mintues
Round difficulty - Easy

Timing it is around 11 am and Environment is good .

  • Q1. 

    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.

    • Make use of the top(), pop(), and push() stack methods provided.

    • Example: If the input stack is [1, 2, 3], after reversal it should be [3, 2, 1].

  • Answered by AI
Round 2 - Face to Face 

(2 Questions)

Round duration - 90 minutes
Round difficulty - Medium

Environment was very friendly but questions asked are very hard.

  • Q1. 

    Maximum Subarray Problem Statement

    Ninja has been given an array, and he wants to find a subarray such that the sum of all elements in the subarray is maximum.

    A subarray 'A' is considered greater than a...

  • Ans. 

    Find the subarray with maximum sum in an array, considering length if sums are equal.

    • Iterate through the array and keep track of the maximum sum subarray seen so far

    • Consider the length of subarrays if the sums are equal to determine the maximum subarray

    • Handle edge cases like negative numbers in the array

  • Answered by AI
  • Q2. 

    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...

  • Ans. 

    Find the node where two linked lists merge, return -1 if no merging occurs.

    • 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 a common node is found

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - Intern in HyderabadEligibility criteriaAbove 5 CGPA[24]7.ai interview preparation:Topics to prepare for the interview - Linked List, Binary Search Tree ,Queue, Array ,DP ,Graph ,RecursionTime required to prepare for the interview - 1 monthInterview preparation tips for other job seekers

Tip 1 : Practice Atleast 500 Questions
Tip 2 : Do atleast 1 good projects
Tip 3 : You should be able to explain your project

Application resume tips for other job seekers

Tip 1 : Do not put false things on resume.
Tip 2 : Have some projects on resume.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview questions from similar companies

I appeared for an interview before Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 90 minutes
Round difficulty - Easy

Pretty easy questions.

  • Q1. 

    Kth Smallest Element Problem Statement

    You are provided with an array of integers ARR of size N and an integer K. Your task is to find and return the K-th smallest value present in the array. All elements...

  • Ans. 

    Find the K-th smallest element in an array of distinct integers.

    • Sort the array and return the element at index K-1.

    • Use a min-heap to find the K-th smallest element efficiently.

    • Implement quickselect algorithm for optimal performance.

  • Answered by AI
Round 2 - Coding Test 

(1 Question)

Round duration - 20 Minutes
Round difficulty - Easy

1 coding question

  • Q1. 

    IP Address Formation from String

    Given a string S consisting only of digits from 0 to 9, your task is to find all potential IP addresses that can be formed from S and list them in lexicographical order. I...

  • Ans. 

    Given a string of digits, find all potential valid IP addresses that can be formed from it.

    • Split the string into four parts and check if each part is a valid IP segment (0-255).

    • Use backtracking to generate all possible combinations of valid IP addresses.

    • Ensure that the IP address does not contain leading zeroes.

    • Return the valid IP addresses in lexicographical order.

  • Answered by AI
Round 3 - Face to Face 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Easy

Total Discussion on OS concepts

  • Q1. Can you explain the concepts related to memory management in operating systems?
  • Ans. 

    Memory management in operating systems involves allocation, deallocation, and optimization of memory usage.

    • Memory allocation: OS allocates memory to processes based on their requirements.

    • Memory deallocation: OS frees up memory when it is no longer needed by a process.

    • Memory optimization: OS optimizes memory usage through techniques like paging, segmentation, and virtual memory.

    • Examples: Paging in which memory is divide...

  • Answered by AI
Round 4 - Face to Face 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Easy

Easy in office environment

  • Q1. 

    Find the Lone Set Bit

    Your task is to identify the position of the only '1' bit in the binary representation of a given non-negative integer N. The representation contains exactly one '1' and the rest are...

  • Ans. 

    Find the position of the lone '1' bit in the binary representation of a given non-negative integer.

    • Iterate through the bits of the integer to find the position of the lone '1'.

    • Use bitwise operations to check if there is exactly one '1' bit in the binary representation.

    • Return the position of the lone '1' or -1 if there isn't exactly one '1'.

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in HyderabadEligibility criteria7 CGPAMicrosoft interview preparation:Topics to prepare for the interview - Trees, graphs, dynamic programming, stacks, queuesTime required to prepare for the interview - 1 MonthInterview preparation tips for other job seekers

Tip 1 : Do a good project.
Tip 2 : Master the topics you are preparing.

Application resume tips for other job seekers

Tip 1 : Avoid writing things you do not know
Tip 2 : Follow a proper format for Resume.

Final outcome of the interviewRejected

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. Basic oops,basic MFC

I appeared for an interview before Jan 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 120 Minutes
Round difficulty - Medium

The test included MCQ questions from SQL, Linux Commands, C/C++ programming, Logical Reasoning, Aptitude
questions. The other section was the coding round, where 2 SQL queries and 2 coding questions were there.

  • Q1. 

    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...
  • 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 any three numbers is equal to the square of another number.

    • Return 'y...

  • Answered by AI
  • Q2. 

    First Unique Character in a String Problem Statement

    Given a string STR consisting of lowercase English letters, identify the first non-repeating character in the string and return it. If no such characte...

  • Ans. 

    Identify the first non-repeating character in a string and return it, or '#' if none exists.

    • Iterate through the string to count the frequency of each character

    • Iterate through the string again to find the first character with frequency 1

    • Return the first non-repeating character or '#' if none exists

  • Answered by AI
Round 2 - Face to Face 

(5 Questions)

Round duration - 70 Minutes
Round difficulty - Medium

This was a standard DSA round where I was asked to solve 2 questions and also code it in a production ready manner . After DS and Algo , I was asked some questions from OOPS and Java followed by some Unix Commands and basic concepts from Operating Systems.

  • Q1. 

    Find Duplicates in an Array

    Given an array ARR of size 'N', where each integer is in the range from 0 to N - 1, identify all elements that appear more than once.

    Return the duplicate elements in any orde...

  • Ans. 

    Find duplicates in an array of integers within a specified range.

    • Iterate through the array and keep track of the count of each element using a hashmap.

    • Return elements with count greater than 1 as duplicates.

    • Time complexity can be optimized to O(N) using a set to store duplicates.

  • Answered by AI
  • Q2. 

    Reverse Linked List Problem Statement

    Given a singly linked list of integers, return the head of the reversed linked list.

    Example:

    Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
    Reversed link...
  • Ans. 

    Reverse a singly linked list of integers and return the head of the reversed linked list.

    • Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.

    • Use three pointers - prev, current, and next to reverse the linked list in O(N) time and O(1) space complexity.

    • Update the head of the reversed linked list as the last node encountered during the reversal process.

  • Answered by AI
  • Q3. What are Serialization and Deserialization in Java?
  • Ans. 

    Serialization is the process of converting an object into a byte stream, while deserialization is the reverse process.

    • Serialization is used to persist object state or transmit objects over a network.

    • Deserialization reconstructs the object from the byte stream.

    • Java provides Serializable interface for serialization and ObjectInputStream/ObjectOutputStream classes for deserialization.

    • Example: Serializing an object to a fi

  • Answered by AI
  • Q4. Can you explain the Singleton Class in Java?
  • Ans. 

    Singleton class in Java ensures that a class has only one instance and provides a global point of access to it.

    • Singleton class restricts the instantiation of a class to one object.

    • It provides a way to access its unique instance globally.

    • Commonly implemented using a private constructor and a static method to return the instance.

    • Example: Logger class in a multi-threaded application.

  • Answered by AI
  • Q5. Can you explain piping in Unix/Linux?
  • Ans. 

    Piping in Unix/Linux allows the output of one command to be used as the input for another command.

    • Piping is done using the | symbol

    • It helps in connecting multiple commands together to perform complex operations

    • Example: ls -l | grep .txt - This command lists all files in long format and then filters out only the .txt files

  • Answered by AI
Round 3 - HR 

(1 Question)

Round duration - 30 Minutes
Round difficulty - Easy

This was a typical HR round with some standard Behavioral questions .

  • Q1. What is something about you that is not included in your resume?

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAAmdocs interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 MonthsInterview preparation tips for other job seekers

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.

Application resume tips for other job seekers

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.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Mar 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. What is rotational shifts. What is web service flow. How will you check ports on Unix or Solaris machine.
  • Ans. 

    Rotational shifts refer to working in different shifts at different times. Web service flow is the sequence of steps involved in a web service request. Checking ports on Unix or Solaris machine involves using the netstat command.

    • Rotational shifts involve working in different shifts at different times, such as day shift, night shift, and swing shift.

    • Web service flow involves a sequence of steps, such as sending a reques...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Total pathetic experience. Have heard of negative reviews from a number of people, but didn't believed. Unfortunately had to share same pain with them. What job description is given to you, doesn't matters because you won't be asked for that. Your resume will get shortlisted and then it doesn't matter what u have covered up in your career path, because interview rounds will consist of questions out of your scope. Your resume doesn't needs to be shortlisted at first end if it doesn't suit thier needs. HR people, they are on another level. You share your resume to them, and they will never ever reply back to you. Not a single HR, but it seems everyone has same culture. You keep trying to connect them for support. But they will just keep finding smarter ways to avoid.

Skills evaluated in this interview

I appeared for an interview in Jul 2019.

Interview Questionnaire 

4 Questions

  • Q1. 1. Java questions basee on interfaces, Exception Handling, inheritance, Steam API;
  • Q2. 2. SQL questions related to joins, sub-queries, nth highest salary;
  • Q3.  3. Basic algorithms questions based on Arrays/Linked List.
  • Q4. 4. Puzzles based on basic aptitudes test.

Interview Preparation Tips

Interview preparation tips for other job seekers - I was interviewed for Java Developer. I had 4 rounds (all technical rounds). Each rounds comprises questions related to Java/Puzzles/Algorithms and my experience of project.

Go through your resume. Things should be relevant and one should have clear understanding of basics.

I applied via Campus Placement

Interview Preparation Tips

Round: Test
Experience: It consists of quant, reasoning, C/C++, Englisg and Unix.
Tips: Go through basics and practice well
Duration: 1:30 hrs minute
Total Questions: 60-70

Round: Technical Interview
Experience: Have thorough knowledge about your project.

Round: HR Interview
Experience: Just a casual talk like about your personal details, hobbies etc.

General Tips: Be confident.
Skills:
College Name: NIT Durgapur

I applied via Referral

Interview Preparation Tips

Round: Test
Experience: I appeared for Amdocs through Campus Recruitment Process. Section 1,2,3 was not tough, if you have practiced RD Sharma then don't worry about these sections as it was the easiest part of the written test. After that there were two coding questions in which you can choose any language(C/C++/Java) to write your code. The code were easy, I mean it wasn't like Codechef problems. If you have ever made the programming assignments by yourself then you would definitely be able to crack this section. Even if you didn't make it then you can practice coding questions like finding H.C.F, L.C.M, Removing redundant number from array, finding whether the string is palindrome or not, finding whether the number is Armstrong number or not,etc,. Now comes the technical section that was little bit tough for those who haven't studied about UNIX ever. It was consisting of C, DBMS and Unix. C questions can easily be attempt by completing "Test your C Skills by Yashwant Kanedtkar", In DBMS most of the questions were query based, some PL/SQL questions were also there, in Unix most of the questions were from VI editor commands and some linux commands like sed, uniq, fdisk and very few questions were from shell scripting like, what will be the output of echo*. Overall the test was easy, since it is easy for everyone so you need to do lots of practice because out of more than 200 students only 39 cleared the written test in our campus.
Duration: 2:30 minutes
Total Questions: 82

Skills: Implementation Of Code Using OOPS, Coding Skills, Database Management, Ability To Think, Ability To Cope Up With Stress, Ability To Deal Diplomatically, 1)communication
College Name: NIT Sikkim

I appeared for an interview in Nov 2016.

Interview Questionnaire 

11 Questions

  • Q1. General technical questions.
  • Q2. Java string class
  • Q3. Java singleton pattern
  • Q4. LinkedIn list loop
  • Q5. Array list operations and search
  • Q6. Tomcat server related
  • Q7. Situations based
  • Q8. Salary negotiation
  • Q9. Location based
  • Q10. Reason for leaving
  • Ans. 

    Seeking better growth opportunities and challenges

    • Limited growth potential in current role

    • Desire to work on more challenging projects

    • Looking for a company with a better cultural fit

    • Relocating to a new area

  • Answered by AI
  • Q11. Expectation

Interview Preparation Tips

Round: Test
Experience: Online test for basic knowledge Check on SQL, UNIX, oops.
Apptitude, reasoning and English.
Tips: Learn UNIX basic commands and vi editor.
SQL query for index, update, delete and stored procedure.
Java exception and oops.
Duration: 2 hours 30 minutes
Total Questions: 90

Round: Technical Interview
Experience: General questions search any interview site.
Tips: Please share your thoughts before answering any question.

Round: HR Interview
Experience: NA
Tips: NA

Skills: Java Programming

Software Engineer Interview Questions & Answers

Adobe user image Devendra Bendkhale

posted on 4 Dec 2015

Interview Questionnaire 

8 Questions

  • Q1. WRITE A GENERIC SWAP FUNCTION
  • Ans. 

    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.

  • Answered by AI
  • Q2. SEARCH AN ELEMENT IN ROTATED SORTED LINKLIST .
  • Ans. 

    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.

  • Answered by AI
  • Q3. SEARCH AN ELEMENT IN ROTATED SORTED ARRAY. WRITED A CODE FOR IT
  • Ans. 

    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

  • Answered by AI
  • Q4. In an Array of size 95 contain numbers in range 1 to 100. each number is at max once in the array. find the 5 missing numbers in array between 1-100
  • Ans. 

    Find 5 missing numbers in an array of size 95 containing numbers in range 1 to 100.

    • Create a boolean array of size 100 and mark the present numbers

    • Iterate through the boolean array and find the missing numbers

    • Alternatively, use a HashSet to store the present numbers and find the missing ones

  • Answered by AI
  • Q5. Given sudoku as id array of size . in a given empty cell find the possible numbers that could be possible. Asked me to write code for it
  • Ans. 

    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.

  • Answered by AI
  • Q6. Given 4 unsigned integers find their integer average (eg. (2,2,2,3) => (2+2+2+3)/4 = 2) consider integer division ) without typecasting
  • Ans. 

    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

  • Answered by AI
  • Q7. Write a code to identify wheter given processor is of 32 bit architecture or 64 bit architecture
  • Ans. 

    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

  • Answered by AI
  • Q8. Convert a binary number into base 64 integer
  • Ans. 

    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

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: SIMPLE CODING QUESTIONS SPEED MATTERS.
Duration: 60 minutes
Total Questions: 3

Skills: Analytics And Coding
College Name: IIT Guwahati

Skills evaluated in this interview

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