Answer:
they send electrical signals to the buzzer. The buzzer changes those electrical signals into sound. You hear the buzzer sound and know that someone is calling you.
Explanation:
Answer:
There is an error in "String s=s1-s2 ";
Explanation:
In java programming, we can subtract subtract two strings variable with "-" operator.Java programming does not support an overload of the '-' operator.In java, we can use only "+" operator to append two strings variable.There is no such method to subtract strings in java.Therefore in the given code String s=s1-s2 will give an "bad operand type" error because we can not subtract one string variable from the second string variable.
I beleive all of the above for question one
Answer:
ASCII character set.
Explanation:
ASCII is an acronym for American Standard Code for Information Interchange and it was developed from a telegraph code. It is typically a character encoding standard that comprises of seven-bit (7-bit) set of codes.
ASCII character set is the character encoding standard that enables up to 128 different commonly used characters, numbers and symbols to be used in electronic communication systems. The ASCII character set is only used for encoding English language and it comprises of both the lower case and upper case letters of the 26 alphabets, number 0 to 9 and symbols.
