Petronas Interview Questions and Answers

Q1. Questions about AWS services
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Q2. Data manipulation using Python
Ans. 
Python is commonly used for data manipulation tasks due to its powerful libraries like Pandas and NumPy.
• Use Pandas library for data manipulation tasks in Python

• Pandas provides data structures like DataFrame for easy manipulation

• Use NumPy for numerical operations on data arrays

• Example: df['new_column'] = df['column1'] + df['column2']
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Interview questions for legal executive position at a Real Estate firm in Bangalore karnataka

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Q1. Explain OS layer
Ans. 
The OS layer is the software layer that manages hardware resources and provides a platform for running applications.
• Manages hardware resources such as CPU, memory, and storage

• Provides a platform for running applications and managing processes

• Handles input/output operations and communication between hardware and software

• Examples include Windows, macOS, Linux, iOS, Android
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Q2. How does Firewall work
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A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
• Acts as a barrier between a trusted internal network and untrusted external network

• Filters traffic based on rules set by network administrators

• Can be hardware-based or software-based

• Can block or allow traffic based on IP addresses, ports, protocols, etc.

• Examples include Cisco AS
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Q3. Explain TCP three-way handshake method
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TCP three-way handshake is a method used to establish a connection between a client and a server in a TCP/IP network.
• Client sends a SYN packet to the server to initiate the connection

• Server responds with a SYN-ACK packet to acknowledge the request

• Client sends an ACK packet back to the server to confirm the connection

• Connection is now established and data transfer can begin
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Q1. Tell me about yourself?
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Q2. One of the biggest Achivement?
Ans. 
One of my biggest achievements was successfully leading a team to complete a complex project ahead of schedule and under budget.
• Led a team to complete a complex project ahead of schedule

• Managed resources effectively to stay under budget

• Received recognition for successful project completion
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Q1. Tell me about refrigeration cycle
Ans. 
Refrigeration cycle is a process in which a refrigerant absorbs heat from a low-temperature space and rejects it in a high-temperature space.
• The refrigeration cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• The refrigerant starts as a low-pressure gas in the evaporator where it absorbs heat from the space being cooled.

• The compressor then compresses the refrigerant into a h...read more
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Q2. How work of four stroke cycle engine?
Ans. 
Four stroke cycle engine works by completing four distinct processes - intake, compression, power, and exhaust strokes.
• Intake stroke: Air-fuel mixture is drawn into the cylinder as the piston moves downward.

• Compression stroke: The intake valve closes and the piston compresses the mixture, preparing it for ignition.

• Power stroke: The spark plug ignites the compressed mixture, causing an explosion that drives the piston d...read more
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Q3. How you handle when you set back?
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