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General Maths Questions in which you are expected to perform an average
OSI Layers are a model for network communication that defines the functions of each layer.
OSI Layers are a 7-layer model for network communication.
Each layer has a specific function and communicates with the layers above and below it.
The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Examples of functions include: Physical layer handles the transmission of raw data, Transpor...
I applied via Campus Placement and was interviewed before Nov 2023. There were 4 interview rounds.
Basic logical reasoning and aps
Can be any general or trending topic
Use a set to keep track of unique numbers while maintaining original order.
Iterate through the array and add each number to a set if it hasn't been encountered before.
Create a new array by iterating through the original array and only adding numbers that are not in the set.
Return the new array with duplicate numbers removed.
Group discussion on some random topics.
Simple basic program for freshers.
I applied via Recruitment Consulltant and was interviewed in Aug 2022. There were 2 interview rounds.
Interface and abstract are both OOP concepts. Interface defines a contract, abstract class provides partial implementation.
Interface is a blueprint for classes to implement, while abstract class is a class that cannot be instantiated but can be subclassed.
Interface can have only method signatures, while abstract class can have both method signatures and concrete methods.
A class can implement multiple interfaces, but ca...
Alstom Transportation interview questions for designations
I applied via Naukri.com and was interviewed in Dec 2020. There were 5 interview rounds.
Code to reverse string without using string or inbuilt function
Create an array of characters from the given string
Swap the first and last characters, then second and second last, and so on until the middle of the array
Convert the array back to a string
Function to generate all possible combinations of a string with a minimum word length of 2.
Use recursion to generate all possible combinations.
Start with a single character and add one character at a time to generate all possible combinations.
Store the generated combinations in an array of strings.
Top trending discussions
posted on 28 Mar 2024
SDLC stands for Software Development Life Cycle, which is a process used by software development teams to design, develop, and test high-quality software.
SDLC consists of several phases including planning, analysis, design, implementation, testing, and maintenance.
Each phase has its own set of activities and deliverables to ensure the software meets the requirements and quality standards.
Examples of SDLC models include...
CAN protocol is a communication standard used in automotive and industrial applications.
CAN protocol stands for Controller Area Network
It is a message-based protocol used for communication between electronic control units (ECUs)
CAN protocol allows for high-speed communication and real-time data transmission
It is commonly used in automotive applications for functions such as engine control, transmission control, and bod...
posted on 11 Nov 2021
I applied via Referral and was interviewed before Nov 2020. There were 4 interview rounds.
Dependency injection is a design pattern where the dependencies of an object are provided externally.
Dependencies are objects that a class needs to function properly
Dependency injection allows for loose coupling between objects
There are three types of dependency injection: constructor injection, setter injection, and interface injection
Example: Instead of creating a new instance of a dependency within a class, the depe...
Steam API is a set of tools and resources for game developers to integrate Steam features into their games.
Steam API provides access to features such as matchmaking, achievements, and user profiles.
Developers can use Steamworks SDK to integrate Steam features into their games.
Steam API also allows for in-game purchases and microtransactions.
Examples of games that use Steam API include Counter-Strike: Global Offensive a
HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.
Hashing function is used to convert the key into an index of an array where the value is stored.
Collisions occur when two keys have the same hash value, which is resolved using separate chaining or open addressing.
HashMap uses an array of linked lists to handle collisions.
The load factor determines when the HashMap shoul...
I was interviewed in Apr 2017.
I am currently responsible for designing, implementing, and maintaining system infrastructure for our organization.
Designing system architecture to meet business requirements
Implementing new technologies and solutions to improve system performance
Maintaining system infrastructure to ensure high availability and security
Troubleshooting and resolving system issues as they arise
System configuration refers to the process of setting up and arranging hardware and software components to work together efficiently.
System configuration involves setting up hardware and software components to work together efficiently
It includes configuring network settings, installing drivers, and setting up user accounts
Examples of system configuration tools include Microsoft System Center Configuration Manager and ...
The S7 controller has limited scalability and flexibility compared to other controllers.
Limited number of I/O points
Limited memory capacity
Limited processing power
Limited communication options
Limited support for advanced programming languages
Limited compatibility with third-party devices
Limited ability to handle complex control algorithms
Limited fault diagnostics capabilities
Topologies and protocols used in networking
Topologies: Bus, Star, Ring, Mesh, Hybrid
Protocols: TCP/IP, HTTP, FTP, SMTP, DNS
Ethernet, Wi-Fi, Bluetooth are common networking technologies
Network security protocols: SSL, TLS, IPSec
Routing protocols: OSPF, BGP, RIP
I am a dedicated and experienced System Engineer with a strong background in network infrastructure and troubleshooting.
Over 5 years of experience in designing, implementing, and maintaining complex systems
Proficient in network protocols such as TCP/IP, DNS, DHCP
Skilled in troubleshooting hardware and software issues
Certified in Cisco CCNA and CompTIA Network+
Strong communication and problem-solving skills
I come from a close-knit family of four, including my parents and younger sister.
Family of four: parents and younger sister
Close-knit family
Supportive family members
Regular family gatherings and activities
I am passionate about utilizing my technical skills to contribute to innovative projects and collaborate with a talented team.
Passionate about technology and innovation
Excited to work with a talented team
Looking for opportunities to utilize technical skills
Yes, this profile aligns with my career goal as a System Engineer.
My career goal is to work in the field of system engineering
I have relevant education and experience in system engineering
I am passionate about technology and problem-solving, which are key aspects of system engineering
I want to switch to explore new challenges and opportunities for growth in my career.
Seeking new challenges to enhance my skills and knowledge
Opportunity for career growth and advancement
Interested in working with new technologies or industries
The opportunity to work on complex systems and solve challenging problems in a dynamic environment.
Opportunity to work on complex systems
Solving challenging problems
Dynamic work environment
My family background is diverse and includes a mix of professions and interests.
My parents are both engineers, which inspired me to pursue a career in the same field.
I have siblings who are in the medical field, providing a different perspective on healthcare.
We have a strong emphasis on education and continuous learning in our family.
Family gatherings often involve discussions about technology, science, and current ev...
My problem-solving skills and attention to detail make me a perfect fit for this role.
Strong problem-solving skills
Attention to detail
Ability to work well under pressure
Experience with troubleshooting complex systems
Strong communication skills
I was interviewed before Mar 2021.
Round duration - 60 Minutes
Round difficulty - Medium
This round started with some questions from Programmable Logic Controllers or PLC followed by some basic questions from Intel 8051 Microcontroller.
PLCs are used to control machinery and automate processes in industrial settings.
Monitoring inputs from sensors
Executing control algorithms
Communicating with other devices
Logging data for analysis
Implementing safety functions
Examples: controlling a conveyor belt, regulating temperature in a furnace
Ladder logic programming is a graphical programming language used for PLCs, with basic elements like contacts, coils, timers, and counters.
Ladder logic consists of rungs, which are made up of inputs (contacts) and outputs (coils).
Contacts represent conditions that must be met for the output to be energized.
Coils are outputs that are energized when the conditions of the contacts are met.
Timers and counters are used to c...
PLC inputs and outputs include digital inputs, digital outputs, analog inputs, and analog outputs.
Digital inputs: used for receiving binary signals (on/off, high/low). Examples: push buttons, limit switches.
Digital outputs: used for sending binary signals. Examples: relays, solenoids.
Analog inputs: used for receiving continuous signals. Examples: temperature sensors, pressure transducers.
Analog outputs: used for sendin...
The S7 controller offers high performance and flexibility but can be complex to program and expensive.
Advantages: high performance, flexibility, scalability
Disadvantages: complexity in programming, expensive
Example: S7-1200 offers fast processing speeds and can be easily expanded with additional modules
Example: Programming for S7 controllers may require specialized training and expertise
The time stamp in S7-200 PLC is used to record the time when a specific event occurs.
Time stamp is a feature in S7-200 PLC that records the time when a specific event happens.
It helps in tracking the sequence of events and troubleshooting issues.
Time stamp can be used to monitor the performance of the PLC system.
Example: A time stamp can be recorded when a sensor detects a change in temperature.
Example: Time stamp can ...
Jnc stands for Jump and Call in the context of microcontrollers.
Jnc is an instruction used in microcontrollers to jump to a specified address if the carry flag is not set.
It is commonly used in conditional branching operations in microcontroller programming.
For example, in 8051 microcontroller assembly language, the instruction JNC label will jump to the specified label if the carry flag is not set.
The types of interrupts in the Intel 8051 microcontroller include external hardware interrupts, timer interrupts, and serial communication interrupts.
External hardware interrupts are triggered by external devices connected to the microcontroller.
Timer interrupts are generated by the internal timers of the microcontroller.
Serial communication interrupts occur when data is received or transmitted through the serial port.
...
Round duration - 50 Minutes
Round difficulty - Medium
This round was heavily inclined towards Operating System and Computer Networks and the interviewer asked questions revolving around the fundamentals of the subject.
A bootstrap program is a small program that initializes the operating system on a computer.
Bootstrap program is stored in ROM or EEPROM and is executed when the computer is powered on.
It loads the operating system kernel into memory and starts its execution.
Bootstrap program is responsible for setting up the initial state of the operating system.
Examples include BIOS (Basic Input/Output System) in PCs and UEFI (Unified
Demand paging is a memory management scheme where pages are only brought into memory when they are demanded by the program.
Pages are loaded into memory only when needed
Helps in reducing the amount of physical memory required
Improves overall system performance by allowing more processes to run simultaneously
Commonly used in virtual memory systems
Five essential UNIX commands are ls, cd, pwd, mkdir, and rm.
ls - list directory contents
cd - change directory
pwd - print working directory
mkdir - make directory
rm - remove files or directories
Different types of VPN include remote access VPN, site-to-site VPN, and client-to-site VPN.
Remote access VPN allows individual users to connect to a private network from a remote location.
Site-to-site VPN connects entire networks together over the internet.
Client-to-site VPN allows individual devices to connect to a private network.
Examples include OpenVPN, IPsec, and SSL VPN.
The OSI Reference Model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
The OSI Reference Model stands for Open Systems Interconnection Reference Model.
It consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer has specific functions and communicates with the adjacent layers for data trans...
TCP is a connection-oriented protocol that ensures reliable data delivery, while UDP is a connectionless protocol that focuses on speed.
TCP stands for Transmission Control Protocol and is used for reliable data transmission.
TCP establishes a connection between sender and receiver before data transfer.
TCP uses sequencing and acknowledgment to ensure data integrity.
UDP stands for User Datagram Protocol and is used for fa...
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.
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 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.
I applied via Approached by Company and was interviewed in Aug 2017. There were 5 interview rounds.
Some of the top questions asked at the Alstom Transportation Software Designer interview -
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Siemens
Bombardier Transportation
CRRC
GE Transportation