JAVA CONCEPTS

Important Java Mcq 1

Which is the correct constructor of gridlayout?

a. GridLayout(int a)

b. GridLayout(int num_rows, int num_columns)

c. GridLayout(int rows, int cols, int vert)

d. GridLayout(int hor)

Answer:

b. GridLayout(int num_rows, int num_columns)

Explanation:

All the

The GridLayout class is a layout manager that lays out a container’s components in a rectangular grid. The container is divided into equal-sized rectangles, and one component is placed in each rectangle. It has two constructors one is row and Another one is column.

Which of the following are not java Modifiers .

a) Public b) Private c) Friendly d) Protected Answer c) Friendly

Which interface should be implemented for sorting on the basis of many criteria?

a) Comparator b) Comparable c) Serializable d) None of the above Answer: a) Comparator

Which of these is not a fundamental feature of OOP?

a) Encapsulation b) Inheritance c) Instantiation d) Polymorphism Answer: c) Instantiation Explanation: OOP stands for Object-Oriented Programming. Procedural programming is about writing procedures or methods

What will be printed as the output of the following program?

a. l = 0 b. I = 1 c. l = 2 d. l = 3 Answer: b. I = 1 Explanation The execution goes