Practice Stack (15.2.2.4) - Collections and Generics

Practise this section

9 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does the push method do in a Stack?
Show hintHide hint
Think about adding a new book on top of a stack of books.
Question 2.
What does pop do in a Stack?
Show hintHide hint
Consider what happens if you remove the topmost book.
3Question 3.
What does the 'push' operation do in a stack?
- It adds an element to the bottom of the stack.
- It removes the top element.
- It adds an element to the top of the stack.
Show hintHide hint
Think about stacking items vertically.
4Question 4.
True or False: The peek operation removes the top element.
- True
- False
Show hintHide hint
Is it more like checking the time on a clock or taking it off the wall?
Question 5.
Implement a method in Java that checks for balanced parentheses in an expression using a Stack.
Show hintHide hint
Consider what happens when you find an opening or closing parenthesis.
Question 6.
Write a Java program that converts a decimal number to binary using a Stack.
Show hintHide hint
How do the remainders help in forming the binary number?

5 more questions in this section. Enroll free to practise them all.