Altiostar Member Technical Staff Interview Questions and Answers

Structs store data in a contiguous block of memory, while pointers store memory addresses.

• Structs store data in a sequential manner in memory

• Pointers store memory addresses of variables

• Example: struct Person { char name[20]; int age; }; Person p; int *ptr = &p.age;

Structure padding is the insertion of empty bytes between structure members to ensure proper alignment.

• Padding is added to align data types on memory boundaries for efficiency.

• It helps in optimizing memory access and improving performance.

• For example, a structure with int, char, and double members may have padding to align them properly.

A scheduler is a function that manages the execution of tasks or processes.

• Inputs: tasks or processes to be scheduled, priority or order of execution

• Output: schedule or order in which tasks or processes will be executed

• Functioning: determines the order of execution based on predefined criteria or algorithms

SPS stands for Scheduling Policy Subsystem. It is responsible for managing the scheduling of processes in an operating system.

• SPS is a component of the operating system that handles process scheduling.

• It determines the order in which processes are executed on the CPU.

• SPS uses various scheduling algorithms to make decisions.

• Some common scheduling algorithms include First-Come, First-Served (FCFS), Round Robin, and ...read more

CQI plays a crucial role in downlink MCS selection.

• CQI stands for Channel Quality Indicator.

• It is a measurement of the quality of the wireless channel between the base station and the user equipment.

• Based on the CQI, the base station determines the appropriate modulation and coding scheme (MCS) for downlink transmission.

• Higher CQI values indicate better channel conditions and allow for higher MCS with higher data ...read more

Storage classes in C define the scope and lifetime of variables.

• There are four storage classes in C: auto, register, static, and extern.

• Auto variables are local to the block they are declared in and have automatic storage duration.

• 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 ...read more