HDFC Bank Data Analyst Interview Questions and Answers

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

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.

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.

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

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

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.