Johnson Controls Engineering Associate 3 Interview Questions and Answers

A sorting algorithm is a method of arranging elements in a specific order.

• Sorting algorithms can be categorized as comparison-based or non-comparison-based.

• Common sorting algorithms include bubble sort, insertion sort, selection sort, merge sort, quicksort, and heapsort.

• Efficiency of sorting algorithms is measured by their time complexity, space complexity, and stability.

• Example: Sorting an array of strings in alphabet

Implement stack data structure

• Use an array or linked list to store elements

• Push operation adds element to top of stack

• Pop operation removes element from top of stack

• Peek operation returns top element without removing it

Global variables are accessible from any part of the program and can be modified by any function.

• Global variables are declared outside of any function.

• They can be accessed and modified by any function in the program.

• If a function modifies the value of a global variable, the new value is visible to all other functions.

• Global variables can be useful for sharing data between functions.

• However, overuse of global variables

Program to transpose a matrix

• Iterate through rows and columns of the matrix

• Swap the elements at (i,j) and (j,i) positions

• Return the transposed matrix

Pre and post fix operators are used to increment or decrement a value before or after it is used in an expression.

• Pre-fix operator (++x) increments the value of x and returns the new value.

• Post-fix operator (x++) returns the value of x and then increments it.

• Both operators can be used with variables of numeric data types.

• They can also be used with pointers to increment or decrement the memory address they point to.

Power supply is an electronic device that provides electrical energy to an electrical load.

• Power supply converts AC voltage to DC voltage.

• It regulates voltage and current to protect the device from damage.

• Types of power supply include linear, switching, and battery.

• Examples of power supply include wall adapters, computer power supplies, and batteries.

BM stands for Blade Material. Nozzle is a device that directs or controls the flow of a fluid.

• BM refers to the material used to make the blades of a fan. It can be plastic, metal, or wood.

• Nozzle is a component that is used to control the flow of a fluid, such as air or water. It can be found in various devices, such as a garden hose or a spray bottle.

• In a fan, the nozzle is the part that directs the air flow in a speci...read more

Designing a blower for industrial use requires consideration of factors such as air flow rate, pressure, power consumption, and noise level.

• Determine the required air flow rate and pressure for the specific application

• Select an appropriate blower type (centrifugal, axial, etc.) based on the requirements

• Calculate the power consumption and efficiency of the blower

• Consider noise level and implement noise reduction measure...read more