PICL Mechanical Engg. Design Interview Questions and Answers

Q1. Bitwise operation and memory layout in c
Ans. 
Bitwise operations are used to manipulate individual bits in memory. Memory layout in C refers to how data is stored in memory.
• Bitwise operations include AND, OR, XOR, and NOT.

• They are often used for tasks like setting or clearing specific bits, checking if a bit is set, or toggling bits.

• Memory layout in C determines how variables are stored in memory, including their size, alignment, and order.

• It is important to under...read more
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Q2. Explain few terms in LTE
Ans. 
LTE stands for Long-Term Evolution, a standard for wireless communication in mobile networks.
• LTE is a 4G wireless communication technology

• It provides high-speed data transmission and low latency

• LTE uses OFDMA for downlink and SC-FDMA for uplink

• LTE supports multiple antennas for improved signal quality (MIMO)

• LTE Advanced (LTE-A) is an enhanced version with higher data rates and capacity
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Q3. In one path goes wrong in mimo does snr and data both or any one goes bad
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Pointer and linked list

Pure technical on kernel programming

Q1. Pure technical questions on background project
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Q2. Mutex semaphore and spinlock
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Q3. How you will achieve multi threaded programming
Ans. 
Multi-threaded programming can be achieved by creating multiple threads that run concurrently.
• Identify the tasks that can be executed in parallel

• Create threads using threading libraries in the chosen programming language

• Synchronize the threads to avoid race conditions and deadlocks

• Use locks, semaphores, and mutexes to manage shared resources

• Optimize the performance by balancing the workload among threads
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Q1. Why you want to join this company
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Q1. This was more like shortlisting round with manager. Asked about resume and previous work experience. Not much Technical questions.
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Q1. Python programming questions, Basics
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Q2. Python oops concepts
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Q3. What is module in Python
Ans. 
A module in Python is a file containing Python code, which can define functions, classes, and variables.
• Modules help organize Python code into reusable components

• Modules can be imported into other Python scripts using the 'import' keyword

• Examples of modules in Python include math, random, and os
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Q4. Python memory management
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Q5. Basic Devops questions
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Q1. Get your basic coding skills right
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Q2. Snippets for all concepts
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Q1. Give a code and write coding or debug
Ans. 
Provide a code snippet and explain how to debug it
• Identify the specific error message or issue in the code

• Check for syntax errors, missing brackets, or typos

• Use debugging tools like console.log or breakpoints to track the flow of the code
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Q1. Explain storage variables in C?
Ans. 
Storage variables in C are used to store data temporarily during program execution.
• Storage variables in C are declared using data types like int, float, char, etc.

• They can be stored in different memory locations like stack, heap, or data segment.

• Variables declared outside functions have global scope and are stored in data segment.

• Variables declared inside functions have local scope and are stored in stack memory.

• Dynami...read more
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Q2. Take two numbers, reverse both, then perform addition and reverse again?
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Q3. First three kinds of sorting
Ans. 
The first three kinds of sorting are bubble sort, selection sort, and insertion sort.
• Bubble sort compares adjacent elements and swaps them if they are in the wrong order.

• Selection sort selects the smallest element and swaps it with the first element, then selects the second smallest element and swaps it with the second element, and so on.

• Insertion sort builds the final sorted array one item at a time by inserting each
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Q4. Output questions based on pointers in C
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Q1. Excel questions
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Q2. Usecase of if, vlookup, sumif, excercise for data cleaning and proper function
Ans. 
Using if, vlookup, sumif for data cleaning and proper function in Excel
• Use IF function to create conditional statements for data cleaning

• Use VLOOKUP function to search for a value in a table and return a corresponding value

• Use SUMIF function to sum values based on a specific condition

• Exercise: Use IF function to categorize data into different groups based on a condition

• Exercise: Use VLOOKUP function to retrieve employe...read more
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