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I applied via Approached by Company and was interviewed in Apr 2024. There was 1 interview round.
A stack is a data structure that follows the Last In, First Out (LIFO) principle, where elements are added and removed from the top.
Elements are added to the top of the stack and removed from the top as well
Common operations on a stack include push (add element) and pop (remove element)
Examples of stacks include the call stack in programming and a stack of plates
VPC stands for Virtual Private Cloud, it is needed to securely isolate resources within the cloud environment.
VPC allows you to create a private network in the cloud.
It provides control over network settings such as IP address range, subnets, route tables, and network gateways.
VPC helps in securing resources by setting up security groups and network access control lists.
It enables you to connect your on-premises networ...
A load balancer is a device or software that distributes network or application traffic across multiple servers to ensure no single server is overwhelmed.
Balances traffic across multiple servers
Improves performance and reliability
Can be hardware or software based
Examples: F5 BIG-IP, NGINX, HAProxy
IAM stands for Identity and Access Management. Policies are rules that determine who has access to what resources.
IAM is a framework for managing digital identities and controlling access to resources
IAM policies are rules that define the permissions and access levels for different users or groups
IAM policies can be attached to users, groups, or resources to control access
IAM helps organizations ensure that only author...
DNS server is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.
DNS servers store a database of domain names and their corresponding IP addresses.
When a user enters a domain name in a web browser, the DNS server is queried to find the corresponding IP address.
DNS servers help in the efficient routing of internet traffic by translating domain names to IP ...
Types of lookup tables include direct mapping, associative arrays, and hash tables.
Direct mapping: uses a key to directly access the corresponding value in the table
Associative arrays: store key-value pairs where keys are unique
Hash tables: use a hash function to map keys to values for efficient retrieval
Troubleshooting steps for network issues
Check physical connections (cables, ports)
Verify network settings (IP address, subnet mask)
Restart networking devices (modem, router)
Run network diagnostics tools (ping, traceroute)
Check for software conflicts or firewall issues
Top trending discussions
I appeared for an interview in Jul 2019.
Design a traffic signal system
Identify the number of lanes and intersections
Determine the traffic flow and peak hours
Choose appropriate sensors and controllers
Implement a synchronization algorithm
Consider emergency vehicle prioritization
Include pedestrian crossing signals
Ensure compliance with local regulations
Hashmap is a data structure that stores key-value pairs and provides constant time complexity for insertion, deletion, and retrieval.
Hashmap uses hashing function to map keys to indices in an array
Collisions can occur when multiple keys map to the same index, which can be resolved using separate chaining or open addressing
Java implementation: HashMap
Printing patterns using code
Identify the pattern to be printed
Use loops to print the pattern
Adjust the loop variables to control the pattern
Use conditional statements to modify the pattern
Examples: printing stars, triangles, squares, etc.
Common point in linked list refers to the node where two or more linked lists intersect.
The common point can be found by traversing both linked lists and comparing the nodes.
The common point can also be found by using two pointers, one for each linked list, and moving them until they meet at the common point.
Examples include finding the intersection point of two linked lists or finding the loop in a linked list.
I applied via Campus Placement and was interviewed before Jun 2020. There were 4 interview rounds.
I applied via Approached by Company and was interviewed before Jun 2021. There were 2 interview rounds.
Frameworks provide structure and pre-built components for software development, but can also limit flexibility and require learning curve.
Advantage: Provides structure and pre-built components for faster development
Advantage: Can improve code quality and maintainability
Disadvantage: Can limit flexibility and customization
Disadvantage: Requires learning curve and potential dependency issues
Example: ReactJS provides a fr...
Oops stands for Object-Oriented Programming. It is a programming paradigm that uses objects to represent real-world entities.
Advantages: code reusability, modularity, encapsulation, inheritance, polymorphism
Disadvantages: complexity, steep learning curve, performance overhead
Example: creating a class 'Car' with properties like 'make', 'model', and 'year', and methods like 'start_engine' and 'stop_engine'
I applied via Naukri.com and was interviewed before Oct 2019. There was 1 interview round.
I applied via Company Website and was interviewed before Jul 2021. There were 2 interview rounds.
Data Structure related questions
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.
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.
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
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
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.
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
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
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
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