CG Power and Industrial Solutions Data Engineer Interview Questions and Answers

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.

DCS, PLC and SCADA systems use various communication protocols such as Modbus, Profibus, Ethernet/IP, etc.

• DCS systems use protocols like Modbus, Profibus, HART, Foundation Fieldbus, etc.

• PLC systems use protocols like Modbus, Ethernet/IP, Profinet, DeviceNet, etc.

• SCADA systems use protocols like Modbus, DNP3, OPC, IEC 60870-5, etc.

• Each protocol has its own advantages and disadvantages, and the choice of protocol depends...read more

Safety action refers to any action taken to prevent or mitigate potential hazards or risks.

• Safety actions can include implementing safety protocols and procedures, providing safety equipment and training, conducting safety audits and inspections, and addressing safety concerns raised by employees or customers.

• Examples of safety actions include installing guardrails on a construction site, providing personal protective ...read more