Logic Fruit Technologies Firmware Engineer Interview Questions and Answers

Q1. About my project
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Q2. In depth knowledge of matlab/simulink
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C program to find address of pointer

Q1. What is the difference between structure and union
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Structure is a data type that allows storing different data types in a single variable, while union is a data type that allows storing only one value at a time.
• Structure allows storing multiple data types in a single variable, while union allows storing only one value at a time

• In structure, each member has its own memory location, while in union all members share the same memory location

• Example: struct Person { char na...read more
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Q2. What is the volatile keyword and it's purpose
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The volatile keyword is used in C/C++ to indicate that a variable may be changed unexpectedly by external factors.
• Used to prevent compiler optimizations that assume the variable's value will not change.

• Commonly used for variables shared between threads or accessed by interrupt service routines.

• Example: volatile int sensorValue; // variable updated by hardware interrupts
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Linked list , data structures

Q1. Explain about yourself
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Q2. Asked past experience
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Q1. Basic C concepts like pointers, strings, array, patterns
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Q1. Question about pattern displaying.
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Q1. Why we should use auto keyword in local scope only
Ans. 
Using auto keyword in local scope only ensures type safety and avoids unintended side effects.
• Auto keyword deduces the type of the variable from its initializer expression.

• Using auto in local scope avoids unintended type conversions and promotes type safety.

• Auto keyword should not be used for function parameters or class members.

• Example: auto x = 10; // x is deduced as int

• Example: auto y = 3.14; // y is deduced as doub
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Q2. Why the default value of reg keyword is garbage value only
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The default value of reg keyword is garbage value due to performance optimization.
• Garbage value is faster to assign than initializing to a specific value.

• Initializing to a specific value would require additional instructions and memory access.

• The value of reg keyword is expected to be overwritten before use.

• Garbage value can help in detecting uninitialized variables during testing.

• Example: int x; // x will have a garba
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Q1. Bitwise operation , data structures, C
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Q1. Why are looking for change
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Q1. Storage classes
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Q2. Coding ques on c
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Q3. Single linked list
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