NBC Bearings Data Engineer Interview Questions and Answers

Based on dynamic programming

Q1. What is static variable?
Ans. 
Static variable is a variable that is associated with a class rather than with any object instance of the class.
• Static variables are declared using the 'static' keyword.

• They retain their values throughout the program's execution.

• They are initialized only once at the start of the program.

• Static variables are shared among all instances of a class.

• Example: 'static int count = 0;' declares a static variable 'count' with in
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Q2. What is constructor
Ans. 
A constructor is a special type of method that is automatically called when an object is created in a class.
• Constructors have the same name as the class they belong to

• They do not have a return type

• They can be used to initialize object properties

• Example: public class Car { public Car() { // constructor code here } }
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Palindrome of string

Simple and easy questions for me

Q1. Whats is H lookup?
Ans. 
HLOOKUP is a function in Excel used to search for a value in the top row of a table and return a value in the same column from a specified row.
• HLOOKUP stands for Horizontal Lookup.

• It is used to search for a value in the top row of a table and return a value in the same column from a specified row.

• Syntax: =HLOOKUP(lookup_value, table_array, row_index_num, [range_lookup])

• Example: =HLOOKUP(100, A1:D4, 3, FALSE) will searc...read more
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Q2. What is v lookup?
Ans. 
VLOOKUP is a function in Excel used to search for a value in a table and return a corresponding value from another column.
• VLOOKUP stands for 'Vertical Lookup'.

• It is commonly used in Excel to search for a value in the leftmost column of a table and return a value in the same row from a specified column.

• The function requires four arguments: the value to search for, the range of cells to search in, the column index number...read more
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An interview with advanced Excel question

Moderate level aptitude but cutoff was at 75%

Q1. Mainly c, aptitude
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It was MCQ based test which involves basic Aptitude questions on the topics like data interpolation, permutation combination and also involved basic questions over Analog and digital electronics system, control system and communication system which usually we learn in 2nd year of the engineering

Q1. Capacitor behaviour in ac/dc circuit?
Ans. 
Capacitors store and release electrical energy in AC/DC circuits.
• Capacitors block DC current while allowing AC current to pass through

• Capacitors store energy in an electric field when connected to a DC circuit

• Capacitors release stored energy in the form of AC current when connected to an AC circuit
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Q2. Diode working principle and breakdown mechanism ?
Ans. 
A diode is a semiconductor device that allows current to flow in one direction only. Breakdown can occur due to excessive voltage or current.
• Diode allows current to flow in one direction due to its PN junction

• Breakdown can occur due to excessive voltage (avalanche breakdown) or excessive current (thermal breakdown)

• Zener diodes are designed to operate in breakdown region for voltage regulation
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Q3. What is thevnins theorem?
Ans. 
Thevenin's theorem states that any linear electrical network can be replaced by an equivalent circuit consisting of a single voltage source and a single series resistor.
• The theorem simplifies complex circuits into simpler equivalent circuits for analysis.

• It helps in determining the voltage and current across any component in the network.

• The equivalent Thevenin voltage is the open-circuit voltage at the terminals of the...read more
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Q4. Stabilloty analysis in control system?
Ans. 
Stability analysis in control systems involves assessing the stability of a system's behavior over time.
• Stability analysis is crucial in ensuring that a control system operates predictably and reliably.

• Methods such as root locus, Bode plot, and Nyquist plot are commonly used for stability analysis.

• Stability criteria, such as the Nyquist stability criterion or Routh-Hurwitz criterion, are used to determine system stabil...read more
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Q5. Explain the project
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Basics

Data structures

Q1. Where do you see yourself in 5 years?
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Q2. Why are you looking for a change?
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Q3. Why should we hire you?
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