InfyTQ Java MCQ Questions 2023

InfyTQ Java Test Pattern

InfyTQ Java Test Pattern | Infosys Certification Test

Below are all the topics from which you will get questions in the Infosys Certification Test, make sure you are practicing all the topics, in order to clear this section.

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1. Which class acts as a root for all java classes?

String

String

14.76%

Object

Object

71.55%

Throwable

Throwable

6.5%

None of the above

None of the above

7.18%

For all java classes the most commonly required functionality is defined inside object class hence object class act as a root for all java classes.

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2. Using the concept of encapsulation security of the data is---------------

Ensured to some extent

Ensured to some extent

44.96%

Purely ensured

Purely ensured

52.13%

Not ensure

Not ensure

1.56%

Very low

Very low

1.35%

The concept of encapsulation can only ensure data security to some extent.

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3. ______is implemented as Combination of methods and attributes into a class

Encapsulation

Encapsulation

48.66%

Inheritance

Inheritance

19.44%

Polymorphism

Polymorphism

14.61%

Abstraction

Abstraction

17.29%

Encapsulation is implemented by combining methods and attributes into a class. The class acts like a container of encapsulating properties

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4. Predict the output

  public class Plant{

  private String name;

  public Plant(String name){ this.name=name;}

  public String getName(){return name;}

}

public class Tree extends Plant{

  public void growFruit(){}

  public void dropLeaves(){}

}

Which statement is true?

The code will compile without changes

The code will compile without changes

38.57%

The code will compile if public Tree() { Plant();} is added to the Tree class.

The code will compile if public Tree() { Plant();} is added to the Tree class.

24.66%

The code will compile if public Plant(){ Tree();} is added to the Plant class.

The code will compile if public Plant(){ Tree();} is added to the Plant class.

18.73%

The code will compile if public Plant(){ this("fern");} is added to the Plant class.

The code will compile if public Plant(){ this("fern");} is added to the Plant class.

18.04%

By default the child class constructor calls the zero argument constructor of the parent class.Therefore, we need to insert zero argument constructor inside parent class Plant.Also we can call only the same class or it’s parent class constructor but we can’t call child class constructor from parent.

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5. \z is used for _____ in regular expression in Java:

Matches end of the string using regular expression

Matches end of the string using regular expression

44.65%

Remove a part of string

Remove a part of string

10.96%

Put a tab space

Put a tab space

11.23%

There is no expression of this name.

There is no expression of this name.

33.15%

\z is used to match end of the entire string in regular expression in java

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6. Which of the following is not a kind of exception that is thrown by the JDBC method?

DataRounding

DataRounding

46.46%

SQL Exception

SQL Exception

18.61%

DataTruncation

DataTruncation

16.02%

SQL Warning

SQL Warning

18.9%

Data Rounding is not a kind of exception that is thrown by JDBc method

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7. What are the major components of the JDBC?

DriverManager, Statement, and ResultSet

DriverManager, Statement, and ResultSet

8.63%

DriverManager, Connection, Statement, and ResultSet

DriverManager, Connection, Statement, and ResultSet

25.4%

DriverManager, Driver, Connection, and Statement

DriverManager, Driver, Connection, and Statement

15.81%

DriverManager, Driver, Connection, Statement, and ResultSet

DriverManager, Driver, Connection, Statement, and ResultSet

50.16%

DriverManager, Driver, Connection, Statement, and ResultSet

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8. Vikas created an interface to use it in different parts of the program by implementing it.But he forgot to specify the access specifier for each contained method. What will be the access specifier of the methods that will be inherited/implemented?

Public

Public

71.41%

Private

Private

13.09%

Protected

Protected

8.24%

No modifier

No modifier

7.27%

Public is the correct answer

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9. In which of the following type of Base64 encoding, Output is mapped to a set of characters lying in A-Za-z0-9+/?

Simple

Simple

30.31%

URL

URL

28.05%

MIME

MIME

28.22%

None of the mentioned

None of the mentioned

13.41%

Output is mapped to a set of characters lying in A-Za-z0-9+/.

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10. How many objects can be referenced from the same variables?

One at a time

One at a time

60.4%

Many at a time

Many at a time

26.24%

Many using array name

Many using array name

12.73%

7 at max at same time

7 at max at same time

0.62%

There should not be any confusion in how many references can be made from a single variable. A single variable can only point to one object at a time. Even if it’s an array, the name of the array is used and is considered one object name only (representing first array element).

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Topic wise analytics for InfyTQ

Stats about this section

Number of Question 100%
Difficulty 80%
Importance 90%

Topic Wise Analysis

Introduction to Programming
Questions 0-2`
Difficulty 50%
Importance 60%
Control Structures
Questions 0-2
Difficulty 50%
Importance 60%
OOP Basics
Questions 0-2
Difficulty 60%
Importance 60%
Memory management
Questions 0-1
Difficulty 80%
Importance 90%
OOPS Concepts
Questions 1-3
Difficulty 80%
Importance 80%
Arrays and String
Questions 2-4
Difficulty 90%
Importance 90%
Debugging and Code Analysis
Questions 0-2
Difficulty 90%
Importance 80%
Static
Questions 0-1
Difficulty 60%
Importance 60%
Relationships
Questions 0-1
Difficulty 50%
Importance 30%
Polymorphism
Questions 0-2
Difficulty 50%
Importance 60%
Object and Wrapper classes
Questions 0-2
Difficulty 60%
Importance 80%
Abstract, final and Interfaces
Questions 0-2
Difficulty 80%
Importance 80%
Unit testing
Questions 0-1
Difficulty 60%
Importance 70%
Recursion
Questions 1-3
Difficulty 80%
Importance 90%
Regular exception
Questions 0-2
Difficulty 70%
Importance 80%

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November 2, 2023