Broadcom Interview Questions and Answers

Compression ratio can be tweaked by adjusting the volume of the combustion chamber. This affects fuel efficiency and power output.

• Compression ratio is the ratio of the volume of the combustion chamber at its largest to its smallest.

• Increasing compression ratio can improve fuel efficiency and power output, but too high a ratio can cause engine knocking.

• Factors that impact compression ratio include the size and shape of ...read more

I have observed hold and setup violations in my design and took necessary actions.

• I used static timing analysis (STA) to identify hold and setup violations.

• I fixed hold violations by adding delay cells or increasing clock period.

• I fixed setup violations by reducing delay or decreasing clock period.

• I also checked for false paths and multi-cycle paths.

• I re-ran STA after fixing violations to ensure timing closure.

• I docume...read more

Explanation of purpose of occ controllers, scan enable signals, lock up latch and arrangement of negative and positive edge triggered flops.

• The purpose of occ controllers is to manage the clock signals in a design and ensure proper timing.

• Scan enable signals are used for testing and debugging purposes.

• Pipelined signals are used for faster data transfer while non-pipelined signals are used for simpler designs.

• Lock up la...read more

Resetting a tap controller without trst signals and finding coverage gaps.

• For resetting a tap controller without trst signals, we can use a power-on reset circuit or a watchdog timer.

• To find coverage gaps, we can use code coverage analysis tools like CodeSonar, Coverity, or LDRA.

• We can also use dynamic analysis tools like Valgrind or Purify to find runtime errors and coverage gaps.

• Manual testing and peer code reviews c...read more

Merge overlapping intervals in a list to create a consolidated list of intervals.

• Sort the intervals by their start times.

• Iterate through the sorted intervals and compare the current interval with the last merged interval.

• If they overlap, merge them by updating the end time of the last merged interval.

• If they don't overlap, add the current interval to the merged list.

• Example: Given intervals [[1,3],[2,6],[8,10],[15,18]]...read more

Maximize profit by buying and selling stocks multiple times with given prices.

• You can buy and sell stocks multiple times.

• Profit is made by buying before selling.

• Example: Prices = [7, 1, 5, 3, 6, 4] -> Buy at 1, sell at 5, profit = 4.

• You can also buy at 3 and sell at 6 for additional profit.

• Total profit = 4 + 3 = 7.

Runtime polymorphism in C++ is achieved through virtual functions, vptr (virtual pointer), and vtable (virtual table).

• Runtime polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Virtual functions are declared in a base class and overridden in derived classes to achieve polymorphism.

• vptr is a pointer that points to the vtable of an object, allowing dynamic binding of virtual ...read more

I primarily use C++17, but I am familiar with earlier versions as well.

• I am comfortable working with features introduced in C++17 such as structured bindings and constexpr if

• I have experience with earlier versions like C++11 and C++14

• I stay updated with the latest features and improvements in C++ standards

Yes, I have used Windows API's extensively in my previous projects.

• I have used Windows API's for tasks such as creating windows, handling messages, and interacting with system resources.

• Examples include using functions like CreateWindow, SendMessage, and ReadFile.

• I have also worked with specific Windows API's like Winsock for networking and WinINet for internet-related tasks.

dynamic_cast is a C++ operator used for safe downcasting of pointers and references in polymorphic classes.

• dynamic_cast is used to safely downcast a pointer or reference from a base class to a derived class.

• It can fail if the object being casted is not of the target type, in which case it returns a null pointer for pointers or throws a std::bad_cast exception for references.

• Dynamic_cast can only be used with pointers o...read more

Union in C++ is a data structure that allows storing different data types in the same memory location.

• Unions are similar to structures but all members share the same memory location.

• Only one member of a union can be accessed at a time.

• Unions are useful when you need to store different data types in the same memory space.

• Example: union MyUnion { int i; float f; };

• Example: MyUnion u; u.i = 10; // Accessing integer member...read more

Weak pointer is a type of smart pointer in C++ that does not control the lifetime of the object it points to.

• Weak pointers are used to break circular references in shared pointers.

• They do not increase the reference count of the object.

• They are used in scenarios where the object may be deleted while there are still weak pointers pointing to it.

Processes and threads are units of execution in a computer system. Memory is allocated to processes. Mutex and semaphore are synchronization mechanisms. Core refers to a processing unit in a multi-core system. Context switching is the process of switching between different processes or threads.

• Processes are independent units of execution with their own memory space and resources.

• Threads are lightweight units of executi...read more

Transformer rating depends on the type of transformer, such as power rating, voltage rating, and current rating.

• Transformer rating includes power rating, voltage rating, and current rating

• Power rating is the maximum power that the transformer can handle

• Voltage rating is the maximum voltage that the transformer can handle

• Current rating is the maximum current that the transformer can handle