Tech Mahindra Interview Questions and Answers

A while loop checks the condition before executing the code block, while a do while loop executes the code block once before checking the condition.

• While loop: Condition is checked before entering the loop.

• Do while loop: Code block is executed at least once before checking the condition.

• Example: while (condition) { // code block } vs. do { // code block } while (condition);

Embedded C programming is a specialized skill used in developing software for embedded systems.

• Embedded C is a variant of the C programming language specifically designed for embedded systems.

• It is used to write code for microcontrollers, sensors, and other hardware devices.

• Embedded C programming requires knowledge of low-level hardware interactions and memory management.

• Example: Writing code to control a robotic arm using a microcontroller.

Boost converter is a type of DC-DC converter that steps up the input voltage to a higher output voltage.

• Boost converter uses an inductor, a diode, a capacitor, and a switch to increase the voltage level.

• During the switch on-time, energy is stored in the inductor. During the switch off-time, the energy is transferred to the output.

• The output voltage is higher than the input voltage due to the energy transfer process.

• Boost converters are commonly used in applications where a hi...read more

Timers and counters are essential in embedded systems for tasks like scheduling, measuring time intervals, generating waveforms, and counting events.

• Timers are used for scheduling tasks at specific intervals, generating PWM signals, and measuring time durations.

• Counters are used for counting external events like pulses, frequency measurement, and capturing input signals.

• Timers and counters are crucial for real-time applications, communication protocols, and controlling hardwa...read more

Different types of loops in C include for, while, and do-while loops.

• For loop: Used when the number of iterations is known. Example: for(int i=0; i<5; i++) {}

• While loop: Used when the number of iterations is unknown. Example: while(condition) {}

• Do-while loop: Similar to while loop but guarantees at least one execution. Example: do {} while(condition);