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Nooreddin N.
Teaching at NYC universities for more than 4 years
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Java Programming
TutorMe
Question:

Why comparing two strings should be down using equals function rather than a == operator.

Nooreddin N.
Answer:

== operator checks the address of two strings, not the content of them. It works only if they refer to literal values (i.e. They are stored in the string literal pool). equals method is overridden in the String class to check the content of two strings.

Discrete Math
TutorMe
Question:

Write down a formula for the sequence $$3,4,6,9,13,18,24,31,38,...$$ Is your formula recursive or explicit?

Nooreddin N.
Answer:

$$a_1 = 3.$$ $$a_n = a_{n−1} + (n − 1).$$ This is a recursive formula.

C++ Programming
TutorMe
Question:

What are the main methods of passing the arguments to the functions?

Nooreddin N.
Answer:

Pass by value, pass by reference and pass by constant reference.

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