Avichal solutions for Computer Applications [English] Class 10 ICSE chapter 1.3 - Values and Data Types [Latest edition]

What is meant by boolean variable? 

What is the difference between "true" and true?

State the escape sequence for horizontal tab. 

State the escape sequence for new line feed.

Is String type a primitive or non-primitive data type?

In what way float initialisation is different from double type initialisation?

What is a variable?

Differentiate between pure and impure type expressions.

Explain the term type conversion.

How is implicit conversion different from explicit conversion?

Give one example of a primitive data type. 

Give one example of a composite data type. 

State the values of n and ch. 

char c = 'A'
int n = c + 1;
char ch = (char)n;

What is a literal?

What are the types of casting shown in the following examples? 

double x = 15.2; int a = 12; 

int y = (int) x;

What is the type of casting shown in the following example?

double x = 15.2; int a = 12;

long b = a;

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

Name the primitive data type in Java that is :

A single 16-bit Unicode character whose default value is ‘\u0000’.

State one difference between the floating point literals float and double.

What is the default value of the primitive data type int?

What is the default value of the primitive data type float? 

Identify the literal given below:

0.5

Identify the literal given below.

'A'

Identify the literal given below.

false

Identify the literal given below.

"a"

Arrange the following primitive data types in an ascending order of their size:

1. char
2. byte
3. double
4. int

What is the type of casting shown by the following example: 

char c = (char) 120;

What is the type of casting shown by the following example?

int x = 't'; 

Write one difference between primitive data types and composite data types.

Match the following literals of Column A with the variables of Column B.

How many bytes a char data type occupies in the memory? 

Which of the following is a non-primitive data type? 

Which of the following is non-numeric data type?

Which of the following ASCII code range is applicable for lowercase letters? 

What is not an escape sequence?

There are 128 set of different characters used in a Java program.

The ASCII codes of uppercase letters range from 97 to 122.

A variable gives the exact representation of data. 

The data types int, float, char are called non-primitive types.

A String literal is assigned to a String variable.

A character literal is always enclosed in double quotes. 

String constant can be written by using a set of alphanumeric characters. 

An object is said to be a non-primitive data. 

The data type int stores fractional values.

Boolean type data is used to test a condition and results in either true or false. 

What is meant by data type? 

Name two types of data type.

Why is it necessary to define data type in Java programming? 

Define the following with an example:

Variable

Define the following with an example:

Constant

Define the following with an example:

Boolean data type

Define the following with an example:

Coercion

Define the following with an example:

Primitive data type

Define the following with an example:

Non-primitive data type

What is a token?

Name different types of tokens. 

Explain the term type casting.

Assign the following to a variable with suitable data type.

m = `22/7` 

Assign the following to a variable with suitable data type.

p = 1.4142135 (value of square root of 2)

Assign the following to a variable with suitable data type.

k = 0.00004545

Assign the following to a variable with suitable data type.

n = 24.50

Distinguish between Token and Identifier.

Distinguish between Character and Boolean literal.

Explain the term type conversion.

How is implicit conversion different from explicit conversion?

Classify the following as primitive or non-primitive data type:

char 

Classify the following as primitive or non-primitive data type.

arrays

Classify the following as primitive or non-primitive data type.

int

Classify the following as primitive or non-primitive data type.

classes

In what way is static initialisation of data type different from dynamic initialisation? 

Predict the return data type of 'r' and 'n' from the snippet:

1. int p; 
2. float m; 

r = p + m;
n = m / 3 * (Math.pow(4, 3)); 
System.out.println(r);
System.out.println(n);   

Give reason whether the following assignment is correct or not.

int m = 155;

Give reason whether the following assignment is correct or not.

float f = 0.002654132;

Give reason whether the following assignment is correct or not.

String str = 'Computer';

Give reason whether the following assignment is correct or not.

boolean p = false;

Give reason whether the following assignment is correct or not.

String b = "true";

Give reason whether the following assignment is correct or not.

char ch = "apps";

Give reason whether the following assignment is correct or not.

String st= "Application";

Give reason whether the following assignment is correct or not.

double n = 455.29044125;