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Barclays PLC Full Stack Developer Interview Questions and Answers

Updated 13 Mar 2024

Barclays PLC Full Stack Developer Interview Experiences

1 interview found

Interview experience
4
Good
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Mar 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Asked about simple sorting question and one based on two pointers.

Round 2 - Technical 

(3 Questions)

  • Q1. In this asked about basic concepts of OOPS like runtime and compile time polymorphism, basic operating system concepts, some java related questions and DBMS.
  • Q2. What is difference between DDL and DML commands in DBMS?
  • Ans. 

    DDL commands are used to define the structure of the database, while DML commands are used to manipulate the data within the database.

    • DDL (Data Definition Language) commands are used to create, modify, and delete database objects such as tables, indexes, and views.

    • Examples of DDL commands include CREATE, ALTER, and DROP.

    • DML (Data Manipulation Language) commands are used to retrieve, insert, update, and delete data in t...

  • Answered by AI
  • Q3. Difference between delete, drop and truncate.
  • Ans. 

    Delete removes specific rows from a table, drop removes the entire table, and truncate removes all rows from a table.

    • Delete is a DML command used to remove specific rows from a table based on a condition.

    • Drop is a DDL command used to remove an entire table along with its structure and data.

    • Truncate is a DDL command used to remove all rows from a table but keeps the table structure intact.

    • Example: DELETE FROM table_name...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Be calm during the interview.

Skills evaluated in this interview

Interview questions from similar companies

Interview Preparation Tips

Round: Technical Interview
Experience: Technical on paper test questions:(dis was only for 12 among d 26 shortlisted ppl after apti...others directly had interviews)
5 wer selected in this test who wer nw sent for interviews
TECHNICAL INTERVIEW: (pls list the questions asked in all the rounds)
26 shortlisted after apti (14 directly for interviews & 12 had one more technical on paper test...mentioned above)
der wer min 2 technical rounds for each of them...max were 5

- You are given course dependencies
A->B,C
B->D
C->A
D->nothing
The above dependencies mean...if you want to take course A...you should take courses B and C first....To take B,Course D must be taken first....D is an independent course and can be taken without any prior requirements.
Now you are told these dependencies.Come up with an appropriate data structure to represent these dependencies.Then write a code that finds out all the courses that the student can take up...in this case the student can first take course D because its independent.Now that course D has been taken he can next take up B as it depends on B alone...But the courses A and C can never be taken because they depend on each other...So here all the courses that can be taken are B and D.
After i wrote the code....he asked for all possible test cases
-Given an array of length N....It can be filled with nos. only from 1 to N....find which nos are repeated in the array
-Given pointers to two nodes in a binary tree....find their least common ancestor...each node has pointer to only the parent node...not the left and right child..
-In a binary tree(Not necessarily a BST)...suppose the weight of any node is defined as the product of the key value of the node and the level of the node(Root at level 1)...find the node with maximum weight in the binary tree
-A sorted array of size n is right circularly rotated k times and this rotated array is given to you as input...Find out the value of k in log n time .
-There are some processes running at time T....and there are processes running at time T+30.
You have to find out
1)Which processes died at time T+30,which were alive at time T
2)Which are the new processes at time T+30,which were not there at time T
3)Which are the processes that were there at time T and are still running at time T+30
What data structure will you use to represent the process lists and write code to find out the answers to the 3 questions above
-Given a binary search tree...and a target sum...starting at the root...which all paths add up to the target sum?...if there are multiple paths....return the path with least no. of nodes.


College Name: Veermata Jijabai Technological Institute, Mumbai [ VJTI ]

Interview Questionnaire 

11 Questions

  • Q1. What is the difference between multi tasking, multi processing and multi programming operating systems with examples ?
  • Ans. 

    Multi tasking, multi processing, and multi programming are different approaches to managing tasks in an operating system.

    • Multi tasking allows multiple tasks to run concurrently on a single processor.

    • Multi processing involves multiple processors running tasks simultaneously.

    • Multi programming allows multiple programs to be loaded into memory and executed concurrently.

    • Examples of multi tasking operating systems include Wi...

  • Answered by AI
  • Q2. Tell me about memory allocation (stack vs. heap)?
  • Ans. 

    Memory allocation refers to the process of assigning memory to programs during runtime.

    • Stack allocation is done automatically and is limited in size.

    • Heap allocation is done manually and is larger in size.

    • Stack memory is used for local variables and function calls.

    • Heap memory is used for dynamic memory allocation.

    • Memory leaks can occur if heap memory is not properly managed.

  • Answered by AI
  • Q3. You have two threads one printing even numbers in order and other odd numbers. Design an algorithm so that it prints numbers in natural order?
  • Ans. 

    Use a shared variable and synchronization mechanisms to ensure natural order printing of numbers.

    • Create two threads, one for printing even numbers and the other for printing odd numbers.

    • Use a shared variable to keep track of the current number to be printed.

    • Implement synchronization mechanisms like locks or semaphores to ensure only one thread can access the shared variable at a time.

    • Each thread should check if it is i...

  • Answered by AI
  • Q4. Print a matrix in spiral order?
  • Ans. 

    Printing a matrix in spiral order

    • Start from the first element and print it

    • Move in a spiral order towards the center of the matrix

    • Repeat until all elements are printed

  • Answered by AI
  • Q5. Thread class and Runnable Interface?
  • Ans. 

    Thread class and Runnable Interface are used for multithreading in Java.

    • Thread class is a predefined class in Java that provides methods to create and control threads.

    • Runnable interface is used to define a task that can be executed by a thread.

    • Thread class implements Runnable interface.

    • Thread class provides more control over threads than Runnable interface.

    • Example: Thread t = new Thread(new MyRunnable()); t.start();

    • Exa...

  • Answered by AI
  • Q6. What’s the difference between a Linked List and an ArrayList and give me an example of when to use which?
  • Ans. 

    Linked List is a dynamic data structure while ArrayList is a static data structure.

    • Linked List is best for frequent insertion and deletion operations.

    • ArrayList is best for frequent access operations.

    • Linked List uses more memory than ArrayList.

    • ArrayList is faster than Linked List for accessing elements.

    • Use Linked List when you need to frequently add or remove elements from the list.

    • Use ArrayList when you need to frequen

  • Answered by AI
  • Q7. Questions of OS concepts?
  • Q8. A role play scenario was given. With a clear instruction on I don’t need to know the basis and the hypothetical assumption was presented. I was told that I was expected to respond to the given scenario, in...
  • Q9. Why are you interested in a career in investment banking?
  • Ans. 

    I am not interested in a career in investment banking.

    • I am more interested in a career in software development

    • I enjoy problem-solving and creating innovative solutions through coding

    • Investment banking does not align with my passion and skill set

  • Answered by AI
  • Q10. Why have you chosen to apply to J.P. Morgan?
  • Ans. 

    I have chosen to apply to J.P. Morgan because of their reputation, global presence, and opportunities for growth.

    • J.P. Morgan has a strong reputation in the financial industry.

    • They have a global presence with offices in multiple countries.

    • The company offers various opportunities for career growth and development.

    • J.P. Morgan is known for its innovative technology solutions in the financial sector.

    • I am impressed by their ...

  • Answered by AI
  • Q11. Have you ever made a mistake? Tell us about it?
  • Ans. 

    Yes, I have made a mistake in my previous project.

    • I underestimated the complexity of a task and ended up missing the deadline.

    • I failed to properly test a feature, resulting in a bug that affected user experience.

    • I accidentally deleted an important file without having a backup.

    • I misunderstood a requirement and implemented a feature incorrectly.

  • Answered by AI

Interview Preparation Tips

Round: Test
Total Questions: 1

General Tips: Interview Process: Aptitude test, followed by 3 rounds of interview. Interview process was very good. Just be positive to clear the interview.
Check this link before appearing for interview with JP Morgan. It will help  -----
Skills: Algorithm, Data structure, Stack
College Name: Na

Skills evaluated in this interview

I was interviewed before Jan 2021.

Round 1 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This was a typical DS/Algo where I was asked to solve two questions related to Binary Trees and write the pseudo code for both of them followed by some theoretical questions related to Operating Systems.

  • Q1. 

    K-th Largest Number in a BST

    Given a binary search tree (BST) consisting of integers and containing 'N' nodes, your task is to find and return the K-th largest element in this BST.

    If there is no K-th la...

  • Ans. 

    Find the K-th largest element in a BST.

    • Perform reverse in-order traversal of the BST to find the K-th largest element.

    • Keep track of the count of visited nodes to determine the K-th largest element.

    • Return -1 if there is no K-th largest element in the BST.

  • Answered by AI
  • Q2. 

    Is Height Balanced Binary Tree Problem Statement

    Determine if the given binary tree is height-balanced. A tree is considered height-balanced when:

    1. The left subtree is balanced.
    2. The right subtree is bala...
  • Ans. 

    Determine if a given binary tree is height-balanced by checking if left and right subtrees are balanced and their height difference is at most 1.

    • Check if the left subtree is balanced

    • Check if the right subtree is balanced

    • Calculate the height difference between the left and right subtrees

    • Return 'True' if all conditions are met, otherwise return 'False'

  • Answered by AI
  • Q3. Can you explain the concepts of Zombie Process and Orphan Process in operating systems?
  • Ans. 

    Zombie process is a terminated process that has completed execution but still has an entry in the process table. Orphan process is a process whose parent process has terminated.

    • Zombie process is created when a child process completes execution but its parent process has not yet read its exit status.

    • Zombie processes consume system resources and should be cleaned up by the parent process using wait() system call.

    • Orphan p...

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This was also a Data Structures and Algorithm round where I was asked to solve 3 medium to hard level problems along with their pseudo code within 60 minutes .

  • Q1. 

    Longest Substring Without Repeating Characters Problem Statement

    Given a string S of length L, determine the length of the longest substring that contains no repeating characters.

    Example:

    Input:
    "abac...
  • Ans. 

    Find the length of the longest substring without repeating characters in a given string.

    • Use a sliding window approach to keep track of the longest substring without repeating characters.

    • Use a hashmap to store the index of each character in the string.

    • Update the start index of the window when a repeating character is found.

    • Calculate the maximum length of the window as you iterate through the string.

    • Return the maximum le

  • Answered by AI
  • Q2. 

    Problem: Search In Rotated Sorted Array

    Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer Q queries. Each query is represented by an integer Q[i], and you must ...

  • Ans. 

    Search for integers in a rotated sorted array efficiently.

    • Use binary search to efficiently search for integers in the rotated sorted array.

    • Handle the rotation of the array while performing binary search.

    • Return the index of the integer if found, else return -1.

  • Answered by AI
  • Q3. 

    Count Subarrays with Sum Divisible by K

    Given an array ARR and an integer K, your task is to count all subarrays whose sum is divisible by the given integer K.

    Input:

    The first line of input contains an...
  • Ans. 

    Count subarrays with sum divisible by K in an array.

    • Iterate through the array and keep track of the prefix sum modulo K.

    • Use a hashmap to store the frequency of each prefix sum modulo K.

    • For each prefix sum, increment the count by the frequency of (prefix sum - K) modulo K.

    • Handle the case when prefix sum itself is divisible by K.

    • Return the total count of subarrays with sum divisible by K.

  • Answered by AI
Round 3 - Face to Face 

(2 Questions)

Round duration - 50 Minutes
Round difficulty - Medium

In this round , I was asked to code a simple question related to BST . After that I was asked the internal implementation of a Hash Map where I was supposed to design a Hash Map using any of the Hashing Algorithms that I know . This was preety challenging for me but I got to learn so much from it.

  • Q1. 

    Ceil Value from BST Problem Statement

    Given a Binary Search Tree (BST) and an integer, write a function to return the ceil value of a particular key in the BST.

    The ceil of an integer is defined as the s...

  • Ans. 

    Ceil value of a key in a Binary Search Tree (BST) is found by returning the smallest integer greater than or equal to the given number.

    • Traverse the BST to find the closest value greater than or equal to the key.

    • Compare the key with the current node value and update the ceil value accordingly.

    • Recursively move to the left or right subtree based on the comparison.

    • Return the ceil value once the traversal is complete.

  • Answered by AI
  • Q2. 

    Design a Constant Time Data Structure

    Create a data structure that maintains mappings between keys and values, supporting the following operations in constant time:

    1. INSERT(key, value): Add or update t...
  • Ans. 

    Design a constant time data structure to maintain mappings between keys and values with various operations.

    • Use a hash table to achieve constant time complexity for INSERT, DELETE, SEARCH, and GET operations.

    • Keep track of the number of key-value pairs for GET_SIZE operation.

    • Check if the hash table is empty for IS_EMPTY operation.

    • Return true or false for SEARCH operation based on key existence.

    • Return the value associated...

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAFlipkart 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 was interviewed before Jan 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 Minutes
Round difficulty - Hard

I found the online coding round of Flipkart to be quite difficult based on the constraints of the problem and their time limits. I coded the first problem quite easily but on the second and the third problem , my code could only pass a few test cases and gave TLE for most of them. Both the questions required very efficient solution and the last 5 to 10 Test Cases carried more weight than the rest so I didn't get through this round.

  • Q1. 

    Print the Kth Digit

    Given three non-negative integers N, M, and K, compute the Kth digit from the right in the number obtained from N raised to the power M (i.e., N ^ M).

    Input:

    The first line contains ...
  • Ans. 

    The task is to find the Kth digit from the right in the number obtained from N raised to the power M.

    • Iterate through the digits of N^M from right to left

    • Keep track of the position of the current digit

    • Return the digit at position K from the right

  • Answered by AI
  • Q2. 

    The Skyline Problem

    Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette when viewed from a distance. Each building is ...

  • Ans. 

    Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette.

    • Iterate through the buildings and create a list of critical points (x, y) where the height changes.

    • Sort the critical points based on x-coordinate and process them to form the skyline.

    • Merge consecutive horizontal segments of equal height into one to ensure no duplicates.

    • Return the fin...

  • Answered by AI
  • Q3. 

    Longest Palindromic Substring Problem Statement

    You are provided with a string STR of length N. The goal is to identify the longest palindromic substring within this string. In cases where multiple palind...

  • Ans. 

    Identify the longest palindromic substring in a given string.

    • Iterate through the string and expand around each character to find palindromes

    • Keep track of the longest palindrome found

    • Return the longest palindrome with the smallest start index

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAFlipkart interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 3 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 interviewRejected

Skills evaluated in this interview

I applied via Campus Placement

Interview Preparation Tips

Round: Test
Experience: It was a good one but both questions would have been easy if we know more libraries in java
Tips: Both the questions were related to bigint. It could have been better if both questions were from different areas
Duration: 90 minutes

Round: Technical Interview
Experience: I felt my interview went fine since i was able to answer most of their questions.They gave many hints even if i didn't get the right one
Tips: Everything was fine

Round: HR Interview
Experience: I was able to see myself how i responded to questions asked regarding me and sometimes i was just blabbering
Tips: nothing

General Tips: One must be good at datastrucures and algorithms
Skill Tips: nothing
Skills: Datastructures and Algorithms
Duration: 2
College Name: IIT Madras
Motivation: I wanted to do something for the company where I ordered many of my things
Funny Moments: No funny moments as such but I enjoyed talking to the hr interviewer

Software Developer Interview Questions & Answers

Flipkart user image RAJIVTEJA NAGIPOGU

posted on 25 Aug 2015

I applied via Campus Placement

Interview Preparation Tips

Round: Test
Experience: The test started very late due to some technical issues and space issues. So , It helped us to be far more relaxed.
Duration: 11/2 hr minutes
Total Questions: 2

Round: Technical Interview
Experience: The Overall Technical Interview was a mixture of innovation and apprehension and it really helped me to get my strengths and weaknesses out. The questions outsmarted me at the beginning, Later I did.

Round: HR Interview
Experience: HR was very friendly. He asked about my strengths and weaknesses. And then we continued talking about the nature of work and sincerity and technicality expected from my side, while taking a stroll in cool night air.

Skills: Algorithms and DataStructures
Duration: 2 months
College Name: IIT Madras
Motivation: The work specification

I applied via Campus Placement

Interview Questionnaire 

2 Questions

  • Q1. First question was about a robot and tracking his movements.Given a string of moves a robot makes check if he ends up at the location he starts from?
  • Q2. Given a list of stars and their distances from the earth.Find an efficient solution to find the k closest stars to earth?
  • Ans. 

    Efficient solution to find k closest stars to earth from a list of stars and their distances.

    • Use a priority queue to store the distances of stars from earth.

    • Iterate through the list of stars and add their distances to the priority queue.

    • Pop k elements from the priority queue to get the k closest stars to earth.

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: The online coding test is not that difficult. The questions are very easy. Only thing is that you have to come up with an efficient solution.The naive solutions are fairly obvious.
Tips: Practice some algorithms questions.
Duration: 90 minutes
Total Questions: 2

Round: Technical Interview
Experience: First question was very simple. I was asked for the solution first and then to write the code on paper and show it to him.Second question requires more time to think.
Tips: A good knowledge of data structures and algorithms will help you clear the interview with ease.

Round: HR Interview
Experience: The guy asking questions makes you feel relaxed. He will give you a feedback about the test and the questions asked in the test. I appreciated the feedback. He pointed out things i could have done better.
Tips: The HR interview is relatively easy. Its just a chat about you and your interests and some other questions like "why should I hire you?".

General Tips: A good knowledge of Data structures and Algorithms will help clear the interview and the test.
Skill Tips: Practice Data structures and Algorithms questions.
Skills: Data structures and Algorithms, Coming up with efficient solutions
Duration: 2
College Name: IIT Madras
Motivation: I wanted to apply for Flipkart as I have seen its meteoric rise in the past few years. It has transformed the wasy people shop in India.

Skills evaluated in this interview

Interview Questionnaire 

9 Questions

  • Q1. A sentence is given which contains lowercase English letters and spaces. It may contain multiple spaces. Get first letter of every word and return the result as a string. The result should not contain any ...
  • Q2. Find Nth largest element in the BST
  • Ans. 

    Find Nth largest element in the BST

    • Traverse the BST in reverse inorder and keep track of count

    • If count equals N, return the current node's value

    • If count exceeds N, stop traversing and return null

    • If count is less than N, continue traversing

  • Answered by AI
  • Q3. Given a BST, find the node which contains the value which is equal to or greater than the input value?
  • Ans. 

    Find node in BST with value equal to or greater than input value.

    • Start at root node

    • If input value is less than current node value, move to left child

    • If input value is greater than or equal to current node value, move to right child

    • Repeat until node with desired value is found or null is reached

  • Answered by AI
  • Q4. Write a program to check if a binary tree is balanced
  • Ans. 

    Program to check if a binary tree is balanced

    • Calculate height of left and right subtrees recursively

    • Check if the difference in height is not more than 1

    • Repeat for all nodes in the tree

    • Time complexity: O(nlogn) or O(n)

    • Space complexity: O(h) where h is the height of the tree

  • Answered by AI
  • Q5. Given s string, Find max size of a sub-string, in which no duplicate chars present?
  • Ans. 

    Find max size of a sub-string with no duplicate characters in a given string.

    • Use a sliding window approach with two pointers.

    • Maintain a hash set to keep track of unique characters.

    • Update the maximum length of the substring as you iterate through the string.

  • Answered by AI
  • Q6. What is a hash table? Explain how they work (hash function and buckets)?
  • Ans. 

    A hash table is a data structure that stores key-value pairs and uses a hash function to map keys to buckets.

    • Hash function takes a key and returns an index to a bucket

    • Collisions occur when multiple keys map to the same bucket

    • Collision resolution techniques include chaining and open addressing

    • Example: Dictionary in Python uses hash tables to store key-value pairs

  • Answered by AI
  • Q7. WAP to find a continuous subset whose sum is divisible by 7. We are given a array of number (-ve and +ve). calculate the complexity of your algorithm?
  • Ans. 

    WAP to find a continuous subset divisible by 7 from an array of numbers. Calculate algorithm complexity.

    • Iterate through the array and calculate the prefix sum modulo 7 at each index.

    • Store the prefix sum modulo 7 in a hash table with the index as the value.

    • If a prefix sum modulo 7 is already in the hash table, the subarray between the two indices has a sum divisible by 7.

    • Time complexity is O(n) and space complexity is O

  • Answered by AI
  • Q8. Given a 2-dimensional array of integers, find the value 1 in the array, and set all those rows, and columns to 1, which contains one of the values as 1
  • Ans. 

    Given a 2D array of integers, set rows and columns to 1 if they contain 1.

    • Iterate through the array to find the index of 1

    • Use two arrays to keep track of rows and columns with 1

    • Iterate through the rows and columns arrays to set values to 1

  • Answered by AI
  • Q9. How to find a number in a rotated sorted array. He was looking for the binary search kind of solution?

Interview Preparation Tips

General Tips: Flipkart Interview Process :-Telephonic Round : 1F2F : 3 Rounds
Skills: Data structure, Algorithm
College Name: NA

Skills evaluated in this interview

Interview Questionnaire 

9 Questions

  • Q1. Write code to find sum of two numbers stored as linked list.(LSB at last node) and head of each list is given
  • Ans. 

    Code to find sum of two numbers stored as linked list.

    • Traverse both lists simultaneously and add corresponding nodes

    • Keep track of carry and add it to next sum

    • Create a new node for each sum and move to next node

  • Answered by AI
  • Q2. Write code to print elements on the path from root to leaf node having the maximum sum
  • Ans. 

    Code to print elements on path from root to leaf node with max sum

    • Traverse the tree and keep track of the maximum sum path

    • Use recursion to traverse the tree

    • Print the path when a leaf node with maximum sum is reached

  • Answered by AI
  • Q3. What is the complexity of retrieving min element from a max heap
  • Ans. 

    Retrieving min element from a max heap has a time complexity of O(log n).

    • The min element is always the leftmost leaf node in the last level of the heap.

    • To retrieve it, swap it with the last element in the heap and remove it.

    • Then, bubble down the new root to maintain the max heap property.

    • Examples: retrieving the smallest number in a priority queue implemented as a max heap.

    • Examples: retrieving the smallest element in a

  • Answered by AI
  • Q4. Which is the fastet method to sort an almost sorted array: quick sort,bubble sort,merge sort,shell sort
  • Ans. 

    The fastest method to sort an almost sorted array is shell sort.

    • Shell sort has a time complexity of O(n log n) which is faster than bubble sort and insertion sort.

    • Quick sort and merge sort have a time complexity of O(n log n) but they are not optimized for almost sorted arrays.

    • Shell sort works by comparing elements that are far apart first and then gradually reducing the gap between them.

    • Example: If the array is [1, 3,...

  • Answered by AI
  • Q5. Tell about zombie process?
  • Ans. 

    A zombie process is a process that has completed execution but still has an entry in the process table.

    • Zombie processes occur when a parent process does not properly wait for its child process to terminate.

    • The zombie process remains in the process table until the parent process reads its exit status.

    • Zombie processes do not consume system resources but can accumulate if not properly handled.

    • They can be identified using ...

  • Answered by AI
  • Q6. Complexities on hash table?
  • Ans. 

    Hash tables have complexities related to collisions, resizing, and choosing a good hash function.

    • Collisions occur when two keys map to the same index, requiring a collision resolution strategy.

    • Resizing can be expensive as all elements need to be rehashed and moved to new locations.

    • Choosing a good hash function is important to minimize collisions and ensure even distribution of keys.

    • Examples of collision resolution stra...

  • Answered by AI
  • Q7. Reverse linked list and a few questions on tress and dynamic prog and aptitude testing?
  • Q8. Given an array find any three numbers which sum to zero. Give the best algorithm?
  • Ans. 

    Algorithm to find any three numbers in an array that sum to zero.

    • Sort the array in ascending order.

    • Loop through the array and fix the first number.

    • Use two pointers to find the other two numbers that sum to the negative of the fixed number.

    • If found, return the three numbers.

    • If not found, move to the next number and repeat the process.

    • Time complexity: O(n^2)

  • Answered by AI
  • Q9. Given a BST, how would you return the kth smallest element. Cover all the corner cases with time complexity logn?
  • Ans. 

    Returning kth smallest element in a BST with time complexity logn.

    • Perform in-order traversal and keep track of count until kth element is reached

    • If kth element is found, return it

    • If kth element is not found, continue traversal

    • If traversal is complete and kth element is not found, return null

    • Time complexity is logn as we only traverse the height of the tree

  • Answered by AI

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Skills: Programming, Algorithm
College Name: NA

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Barclays PLC Interview FAQs

How many rounds are there in Barclays PLC Full Stack Developer interview?
Barclays PLC interview process usually has 2 rounds. The most common rounds in the Barclays PLC interview process are Coding Test and Technical.
What are the top questions asked in Barclays PLC Full Stack Developer interview?

Some of the top questions asked at the Barclays PLC Full Stack Developer interview -

  1. What is difference between DDL and DML commands in DB...read more
  2. Difference between delete, drop and trunca...read more
  3. In this asked about basic concepts of OOPS like runtime and compile time polymo...read more

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Barclays PLC Full Stack Developer Interview Process

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Barclays PLC Full Stack Developer Salary
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₹13 L/yr - ₹34 L/yr
147% more than the average Full Stack Developer Salary in India
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