TRAY Interview Questions and Answers

Regex for email validation

• Start with a string of characters followed by @ symbol

• Followed by a string of characters and a period

• End with a string of characters with a length of 2-6 characters

• Allow for optional subdomains separated by periods

• Disallow special characters except for . and _ in username

Print prime numbers in a given range and optimize the solution.

• Use Sieve of Eratosthenes algorithm to generate prime numbers efficiently

• Start with a boolean array of size n+1, mark all as true

• Loop through the array and mark all multiples of each prime as false

• Print all the indexes that are still marked as true

Find angle between hour and minute hand in a clock given the time.

• Calculate the angle made by the hour hand with respect to 12 o'clock position

• Calculate the angle made by the minute hand with respect to 12 o'clock position

• Find the difference between the two angles and take the absolute value

• If the angle is greater than 180 degrees, subtract it from 360 degrees to get the smaller angle

To un-hash a string, use a reverse algorithm to convert the hash back to the original string.

• Create a reverse algorithm that takes the hash as input and outputs the original string

• Use the same logic as the hash function but in reverse order

• If the hash function used a specific algorithm, use the inverse of that algorithm to un-hash the string

My training project involved designing and implementing a network infrastructure for a medium-sized company.

• Researched and analyzed the company's requirements for network connectivity and security.

• Designed a network architecture that included routers, switches, firewalls, and VPNs.

• Configured and tested the network devices to ensure proper functionality.

• Implemented security measures such as access control lists and intr...read more

Mobile apps work by running code on the device to perform specific tasks and interact with the user.

• Mobile apps are developed using programming languages like Java, Swift, or Kotlin.

• Apps are installed on the device and run locally, utilizing the device's resources.

• They can access device features like camera, GPS, and sensors.

• Apps communicate with servers or APIs to fetch data or perform actions.

• User interactions trigge...read more

Big Data refers to large and complex sets of data that cannot be easily managed or processed using traditional methods.

• Big Data is characterized by the 3Vs: Volume, Velocity, and Variety.

• Volume refers to the vast amount of data generated and collected from various sources.

• Velocity refers to the speed at which data is generated and needs to be processed in real-time.

• Variety refers to the different types and formats of d...read more

SMAC stands for Social, Mobile, Analytics, and Cloud.

• SMAC is a combination of four technologies that are transforming businesses and industries.

• Social refers to the use of social media platforms for communication and collaboration.

• Mobile refers to the use of mobile devices and applications for accessing information and services.

• Analytics refers to the use of data analysis tools and techniques to gain insights and make ...read more

I am a system engineer with expertise in designing and maintaining complex computer systems.

• Experienced in configuring and troubleshooting network devices

• Proficient in scripting languages like Python and Bash

• Skilled in virtualization technologies such as VMware and Hyper-V

• Knowledgeable in cloud computing platforms like AWS and Azure

• Familiar with ITIL best practices for service management