Visteon Hardware Design Engineer Interview Questions and Answers

A unique not null column can be used as a primary key, but not vice versa.

• Primary key must be unique and not null, but not all unique not null columns need to be primary keys.

• Primary key is used to identify each row uniquely, while unique not null column is used to ensure data integrity.

• A table can have multiple unique not null columns, but only one primary key.

Null cannot be equated as it represents absence of a value.

• Null is not equal to any value, including itself.

• Attempting to equate null can result in unexpected behavior.

• Null is often used to represent the absence of a value or unknown value.

Procedure overloading allows calling the correct procedure based on the number of parameters provided.

• Procedure overloading is based on the number of parameters.

• If calling with 2 arguments, the 2-parameter procedure is invoked.

• If calling with 3 arguments, the 3-parameter procedure is invoked.

• Passing a null as one of the parameters will still invoke the 3-parameter procedure if 3 arguments are provided.

Web service flow is the sequence of steps involved in the communication between a client and a server over the internet.

• Web service flow involves a client sending a request to a server

• The server processes the request and sends a response back to the client

• The response can be in various formats such as XML, JSON, or plain text

• Web service flow can be synchronous or asynchronous

• Examples of web services include RESTful API...read more

To check ports in Solaris or Linux machine, use the netstat command.

• Open the terminal and type 'netstat -an' to display all open ports.

• Use 'netstat -an | grep ' to check if a specific port is open.

• To check listening ports, use 'netstat -an | grep LISTEN'.

• For Solaris, use 'netstat -an | grep .' instead of '| grep '.

C++ program to reverse a string

• Use a loop to iterate through the string

• Swap the characters at the beginning and end of the string

• Continue swapping until the middle of the string is reached