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HDFC Bank Data Analyst Interview Questions and Answers

Updated 8 Nov 2024

Q1. What is multicollinearity and what are its effects?

Ans.

Multicollinearity is a phenomenon where two or more independent variables in a regression model are highly correlated.

  • It can lead to unstable and unreliable estimates of regression coefficients.

  • It can make it difficult to determine the individual effect of each independent variable on the dependent variable.

  • It can also result in inflated standard errors and p-values, making it difficult to identify statistically significant variables.

  • It can be detected using methods such as c...read more

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Q2. Which language understand the computer?

Ans.

Computers understand machine language, which is a set of binary codes representing instructions that the computer can execute.

  • Computers understand machine language, which consists of binary code representing instructions.

  • High-level programming languages like Python, Java, C++ are used to write code that is then translated into machine language.

  • Compilers and interpreters are used to convert high-level code into machine language for the computer to understand.

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Q3. What is the advantage or lstm over rnn.

Ans.

LSTM has better memory retention than RNN.

  • LSTM can remember long-term dependencies better than RNN.

  • LSTM has a gating mechanism that controls the flow of information.

  • LSTM can handle vanishing gradient problem better than RNN.

  • LSTM is more suitable for tasks that require long-term memory, such as speech recognition and language translation.

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Q4. What does BIOS works for?

Ans.

BIOS works as a firmware that initializes hardware components during the boot process of a computer.

  • BIOS stands for Basic Input/Output System

  • It is responsible for initializing and testing hardware components like the CPU, memory, and storage devices

  • BIOS also provides the necessary instructions for the operating system to boot up

  • It is stored on a ROM chip on the motherboard

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Q5. What is the machine language?

Ans.

Machine language is the lowest-level programming language that directly corresponds to instructions executed by a computer's CPU.

  • Machine language consists of binary code representing instructions that can be executed by a computer's central processing unit (CPU)

  • It is the lowest-level programming language and is specific to the type of CPU being used

  • Machine language is difficult for humans to read and write, as it is composed of strings of 0s and 1s

  • Examples of machine language...read more

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Q6. What is Ram? What is Rom?

Ans.

RAM stands for Random Access Memory, a type of computer memory that can be accessed randomly. ROM stands for Read-Only Memory, a type of memory that stores data permanently.

  • RAM is volatile memory used by the computer to store data and program instructions temporarily.

  • ROM is non-volatile memory that stores firmware and cannot be easily modified or deleted.

  • RAM is faster but loses data when power is turned off, while ROM is slower but retains data even when power is off.

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Q7. what is indexing

Ans.

Indexing is a technique used to optimize the performance of databases by creating a data structure that allows for quick retrieval of data.

  • Indexing involves creating a data structure that maps the values of a particular column in a database table to their physical storage locations on disk.

  • It helps in speeding up data retrieval operations by allowing the database to quickly locate the rows that satisfy a certain condition without having to scan the entire table.

  • Examples of in...read more

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Interview Process at HDFC Bank Data Analyst

based on 11 interviews
3 Interview rounds
Resume Shortlist Round
Aptitude Test Round
Technical Round
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