Forwarded from TechShiksha by Badkul Technology (spring boot and microservices admin)
Which of the following statements about Java interfaces is true?
Anonymous Quiz
15%
An interface can be instantiated using the new keyword.
19%
An interface can contain instance variables.
26%
An interface can have method implementations.
40%
An interface can extend multiple other interfaces.
Which of the following statements is true about checked and unchecked exceptions in Java?
Anonymous Quiz
68%
Checked exceptions are checked at compile-time, while unchecked exceptions are checked at runtime.
14%
Checked exceptions are checked at runtime, while unchecked exceptions are checked at compile-time.
11%
Checked exceptions and unchecked exceptions are both checked at compile-time.
7%
Checked exceptions and unchecked exceptions are both checked at runtime.
👍5
Which of the following is a new feature introduced in Java 17?
Anonymous Quiz
24%
records
20%
switch expression
38%
lambda expression
19%
Generics
👏7
What is the purpose of a while loop?
Anonymous Quiz
30%
To iterate over a collection of elements
7%
To declare variables in a program
58%
To execute a block of code multiple times
5%
To handle exceptions in a program
👍7
In a while loop, when is the loop condition checked?
Anonymous Quiz
39%
Before each iteration
23%
After each iteration
31%
Before the loop starts
8%
After the loop ends
👍3👌2
Which of the following statements correctly creates a two-dimensional array with 3 rows and 4 columns?
Anonymous Quiz
68%
int[][] matrix = new int[3][4];
9%
int[3, 4] matrix = new int[][];
13%
int[3][4] matrix = new int[];
10%
int[][] matrix = new int[]{3, 4};
👏7
Learn Constructors in java, along with interview questions
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Interview Questions on Constructors in Java
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Which of the following statements about constructors in object-oriented programming is true?
Anonymous Quiz
10%
Constructors are used to destroy objects.
11%
Constructors can have a return type.
12%
Constructors are called explicitly by the programmer.
66%
Constructors are automatically invoked when an object is created.
👏4👍1
Which of the following statements is true about the loop body in a while loop?
Anonymous Quiz
22%
It must always execute at least once
11%
It will always execute
65%
It executes based on the condition
2%
It is optional
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🔥7👍1
Interface methods in Java are by default:
Anonymous Quiz
63%
public
14%
private
9%
protected
14%
final
👍2
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❤6👍4
Which of the following is an example of a predefined interface in Java?
Anonymous Quiz
38%
Comparable
23%
ArrayList
30%
Scanner
9%
Math
🥰3👏2😁2