Data Types & Variables

Test 5

12 questions|30 marks

This test will assess your understanding of Data Types & Variables

Question 1

2 marks

Select the primitive data type in Java that is 64-bit integer and is used when you need a range of values wider than those provided by int

double

short

char

long

Question 2

2 marks

These primitive data types arranged in ascending order of their size will be

byte, double, char, int

byte, char, int, double

byte, int, char, double

char, byte, int, double

Question 3

2 marks

int res = 'A'; What is the value of res?

Question 4

2 marks

Memory capacity (storage size) of short and float data types in bytes are

4 bytes & 2 bytes

2 bytes & 2 bytes

2 bytes & 4 bytes

4 bytes & 4 bytes

Question 5

2 marks

Which of the following statements correctly assigns boolean literal true to a variable of boolean data type?

boolean present = 'true';

boolean present = "true";

boolean present = true;

None of the statements are correct

Question 6

4 marks

Identify these literals - 0.5, 'A', false, "A"

Floating point literal, String literal, Boolean literal, Character literal

Floating point literal, Boolean literal, String literal, Character literal

Floating point literal, Character literal, String literal, Boolean literal

Floating point literal, Character literal, Boolean literal, String literal

Question 7

1 marks

Name of a variable can be an identifier or a keyword

True

False

Question 8

2 marks

What is meant by uninitialized variables?

We have declared the variable but not assigned any value to it yet

We have changed the value of the variable

We have not declared the variable yet

We have declared the variable and assigned it a value

Question 10

1 marks

Scope of a local variable is the code block within which it is declared

True

False

Question 11

5 marks

Incase of nested scope

Variables declared in outer scope are not accessible to code in the inner scopeVariables declared in the inner scope are not accessible outside the inner blockInside the inner scope it is ok to declare a variable with the same name as one in the outer scopeVariables declared in the inner scope are accessible outside the inner blockVariables declared in outer scope are accessible to code in the inner scope

Question 12

2 marks

Which is the correct declaration of the constant PI of type double?

double PI = 3.14159;

double PI final = 3.14159;

double final PI = 3.14159;

final double PI = 3.14159;

Test 5

12 questions|30 marks

Question 1

2 marks

Question 2

2 marks

Question 3

2 marks

Question 4

2 marks

Question 5

2 marks

Question 6

4 marks

Question 7

1 marks

Question 8

2 marks

Question 9

5 marks

Question 10

1 marks

Question 11

5 marks

Question 12

2 marks