Walker Digital Table Systems Interview Questions and Answers

Q1. Design Memory allocator for user space programs like malloc.
Ans. 
Design a memory allocator for user space programs like malloc.
• The allocator should manage memory efficiently and avoid fragmentation.

• It should support multiple threads and handle concurrent requests.

• Consider using techniques like buddy allocation or slab allocation.

• Implement features like memory alignment and garbage collection.

• Test the allocator thoroughly to ensure correctness and performance.
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Q2. System Programming concepts.
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Q1. Operating System Internals, Device Driver, Arm Architecture.
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Q1. System Programming Concepts, Domain specific(GPU, graphics) concepts related to computer graphics
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Q1. Domain(GPU) Specific Concepts, Virtual Memory address alignment question and system concepts.
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Q1. Generic HR round
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Q1. -what is the four-wheel drive?
Ans. 
Four-wheel drive is a system that powers all four wheels of a vehicle simultaneously for better traction and control.
• It is commonly used in off-road vehicles and SUVs.

• It provides better traction and control on slippery or uneven surfaces.

• Four-wheel drive can be engaged or disengaged depending on the driving conditions.

• It is different from all-wheel drive, which powers all four wheels all the time.

• Examples of vehicles w...read more
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Q2. - the significance of differential in a vehicle?
Ans. 
Differential in a vehicle allows wheels to rotate at different speeds, enabling smooth turns and preventing tire wear.
• Differential is a mechanism that splits torque between wheels on an axle

• It allows wheels to rotate at different speeds while maintaining power to both wheels

• Without differential, the wheels would be forced to rotate at the same speed, making turns difficult and causing tire wear

• Examples of vehicles with...read more
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Q3. - difference in diesel and petrol engine
Ans. 
Diesel engines use compression ignition while petrol engines use spark ignition.
• Diesel engines are more fuel-efficient than petrol engines.

• Petrol engines have higher power output than diesel engines.

• Diesel engines produce more torque than petrol engines.

• Diesel engines are more durable and have longer lifespan than petrol engines.

• Petrol engines are quieter and smoother than diesel engines.

• Diesel engines emit more pollut...read more
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Q4. - significance of piston rings
Ans. 
Piston rings are crucial components in internal combustion engines that prevent oil and fuel from leaking into the combustion chamber.
• Piston rings create a seal between the piston and cylinder wall, allowing the engine to build compression and power.

• They also help regulate oil consumption and prevent excessive oil from entering the combustion chamber.

• Piston rings can wear out over time, leading to decreased engine perf...read more
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Q5. Sprung and unsprung mass
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Q1. Will ask about operations and pnl
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Q2. Discuss about bsc and its parameters
Ans. 
BSc is an undergraduate academic degree awarded for completing a program in science or related field.
• BSc stands for Bachelor of Science

• It is a 3-4 year undergraduate degree program

• The program includes theoretical and practical knowledge in science and related fields

• The parameters of BSc may vary depending on the university and the program chosen

• Some common parameters include credit hours, GPA, and course requirements

• Ex...read more
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Q1. Tell me about yourself
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Q2. Basic to Advance level Questions on SQL Like views , index , stored Procedure etc.
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Q3. Basic Excel Question like Vlookup, Hlookup etc.
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Q4. Basic Finance questions like Stock, Sensex.
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Q5. What is your Family Background.
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Q6. What is your Strength and Weakness?
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