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Guide for LEX_AUTH_012975476940365824839: Infosys Certified Java SQL and Telecom

Quiz LEX_AUTH_012975476940365824839: Infosys Certified Java SQL and Telecom

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/ 10

Quiz

1/10
Java Basics
What is the default value of a boolean instance variable in Java?
Select the answer
1 correct answer
A.
true
B.
false
C.
0
D.
null

Quiz

2/10
Object-Oriented Programming
What is encapsulation in object-oriented programming?
Select the answer
1 correct answer
A.
Hiding implementation details by exposing only necessary interfaces
B.
Inheriting properties from a parent class
C.
Allowing one method to perform different behaviors
D.
Creating multiple objects from a single class

Quiz

3/10
Exception Handling
What is the parent class of all exceptions and errors in Java?
Select the answer
1 correct answer
A.
Exception
B.
RuntimeException
C.
Error
D.
Throwable

Quiz

4/10
Collections Framework
Which Java collection maintains insertion order and allows duplicate elements?
Select the answer
1 correct answer
A.
HashSet
B.
ArrayList
C.
TreeSet
D.
HashMap

Quiz

5/10
Java 8 Features
What is a lambda expression in Java?
Select the answer
1 correct answer
A.
A named class that implements a functional interface
B.
An anonymous function that can be passed as a method argument
C.
A method that runs asynchronously
D.
A type of loop for collections

Quiz

6/10
Multithreading and Concurrency
What is the primary difference between a process and a thread?
Select the answer
1 correct answer
A.
Threads have their own memory space; processes share memory
B.
Threads are heavier than processes
C.
Threads are independent; processes share the same memory space within a program
D.
Threads share the process's memory space; processes have separate memory spaces

Quiz

7/10
String Handling
Are String objects immutable in Java?
Select the answer
1 correct answer
A.
No, String can be modified using replace()
B.
Yes, String objects cannot be changed after creation
C.
Only string literals are immutable
D.
Only synchronized Strings are immutable

Quiz

8/10
Java I/O and Serialization
What is a stream in Java I/O?
Select the answer
1 correct answer
A.
A thread for handling I/O
B.
A sequential flow of data read from or written to a source/destination
C.
A database connection pool
D.
A synchronized buffer for file access

Quiz

9/10
Design Patterns in Java
What is the Singleton design pattern?
Select the answer
1 correct answer
A.
A pattern for creating multiple similar objects efficiently
B.
A pattern ensuring a class has exactly one instance with a global access point
C.
A pattern where one class delegates all work to a single helper class
D.
A pattern for single-method classes

Quiz

10/10
SQL Fundamentals
What does DML stand for in SQL?
Select the answer
1 correct answer
A.
Data Management Language
B.
Data Markup Language
C.
Data Manipulation Language
D.
Database Modification Language
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Info quiz:

  • Quiz name:LEX_AUTH_012975476940365824839: Infosys Certified Java SQL and Telecom
  • Total number of questions:400
  • Number of questions for the test:50
  • Pass score:80%

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