Qualcomm L2 Engineer Interview Questions, Process, and Tips

Q1. It was an online assessment, technical questions based on manufacturing, design, quality control,SOM.
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It was an online ph test

Q1. Basic question from my field
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Q2. Speed and feed formula
Ans. 
Speed and feed formula is used in machining to determine the optimal cutting parameters for a specific material and tool.
• Speed and feed formula calculates the spindle speed (RPM) and feed rate (IPM) for a given material and tool combination.

• The formula takes into account factors such as material type, tool diameter, and desired surface finish.

• For example, the formula for calculating spindle speed is: RPM = (CS x 4) / D...read more
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Q3. Difference and least count of various measuring instrument
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Difference and least count of measuring instruments
• Difference: Range of values that can be measured by the instrument

• Least count: Smallest change in the quantity being measured that can be detected by the instrument

• Examples: Vernier caliper - Difference: 0-150mm, Least count: 0.02mm; Micrometer screw gauge - Difference: 0-25mm, Least count: 0.01mm
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Q1. Basic of CNC functions
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Q2. Types of pneumatics n hydralics systems
Ans. 
Pneumatics and hydraulics systems are used in engineering for power transmission and control.
• Pneumatics systems use compressed air to transmit power, commonly used in industries for automation and control.

• Hydraulics systems use pressurized liquid (usually oil) to transmit power, commonly used in heavy machinery like excavators and hydraulic presses.

• Pneumatics systems are generally faster but less powerful than hydrauli...read more
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Q3. What are major and minor breakdown attended and described the solutions
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Major breakdowns include server crashes, while minor breakdowns may involve software glitches.
• Major breakdown: Server crash - Solution: Restart server and investigate root cause

• Minor breakdown: Software glitch - Solution: Update software or restart application

• Major breakdown: Network failure - Solution: Check network connections and troubleshoot

• Minor breakdown: Printer jam - Solution: Clear jammed paper and reset print
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Q4. Parameter and keep reply related questions
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Q5. Questions about auditing
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Q6. Questions about Projects done in previous company
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Q1. Self intro about me
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Q2. Salary related questions
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions on OOPS and OS mainly.

Q1. What are Little Endian and Big Endian in the context of computer architecture?
Ans. 
Little Endian and Big Endian refer to the order in which bytes are stored in computer memory.
• Little Endian stores the least significant byte first, while Big Endian stores the most significant byte first.

• Little Endian is commonly used in x86 architecture, while Big Endian is used in architectures like SPARC and PowerPC.

• Endianness can affect data transmission between systems with different byte orders.
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Q2. Write a program to determine if your system is little-endian or big-endian.
Ans. 
Program to determine system's endianness
• Check the endianness by storing a multi-byte integer and checking the byte order

• Use bitwise operations to extract the least significant byte

• If the least significant byte is at the lowest memory address, it's little-endian

• If the least significant byte is at the highest memory address, it's big-endian
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Q3. What is the volatile keyword in programming?
Ans. 
The volatile keyword in programming is used to indicate that a variable's value can be changed unexpectedly.
• Volatile keyword is used in multithreaded programming to prevent compiler optimizations on variables that can be changed by other threads.

• It tells the compiler not to cache the variable's value in a register, ensuring that every access is made to the variable's memory location.

• Commonly used in embedded systems pr...read more
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Q4. What is the use of a function pointer in C?
Ans. 
Function pointers in C are used to store the address of functions, allowing for dynamic function calls and callbacks.
• Function pointers can be used to implement callbacks in event-driven programming.

• They can be used to switch between different functions at runtime.

• Function pointers are commonly used in implementing data structures like function pointers in an array of function pointers.

• Example: void (*funcPtr)(int) = &a
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Q5. Design a data structure to implement multi-threading.
Ans. 
Design a data structure for multi-threading
• Use a thread-safe queue to manage tasks for each thread

• Implement a lock or semaphore to control access to shared resources

• Consider using condition variables for synchronization

• Use atomic operations for shared variables to prevent race conditions
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Q6. What does a kernel do?
Ans. 
The kernel is the core component of an operating system that manages system resources and provides a bridge between software and hardware.
• Manages system resources such as CPU, memory, and I/O devices

• Provides a bridge between software applications and hardware components

• Handles tasks such as process scheduling, memory management, and device drivers

• Controls communication between hardware and software layers
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Q7. What is a storage class in programming?
Ans. 
A storage class in programming defines the scope and lifetime of variables.
• Storage classes include auto, register, static, and extern.

• Auto variables are created when a function is called and destroyed when the function ends.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared outside of any function and can be accessed
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.