JAVA CONCEPTS

Important Java Mcq 1

Which one of the following is not a Java feature?

a) Object-oriented

b) Use of pointers

c) Portable

d) Dynamic and Extensible

Answer:

b) Use of pointers

Explanation:

Pointers store and manage the addresses of dynamically allocated blocks of memory. It is not a Java feature. Java provides an efficient abstraction layer for development without using a pointer in Java. Features of Java Programming are Portable, Architectural Neutral, Object-Oriented, Robust, Secure, Dynamic and Extensible, etc.

Which of the following are true about flowlayout?

a. The default layout manager for an Applet is FlowLayout b. The default layout manager for an application is FlowLayout c. A layout manager must

A java exception is an instance of

a. RuntimeException b. Exception c. Error d. Throwable e. NumberFormatException Answer: d. Throwable Explanation: Every exception is represented by an instance of the class Throwable.

In which of the following package Exception class exist?

a) Java. util b) Java. file c) Java.io d) Java.lang Answer d) Java.lang

A constructor

a. Must have the same name as the class it is declared within. b. fIs used to create objects. c. May be declared private d. (a),