This is the 21st day of my participation in the August More Text Challenge

Difficulty level: Easy

The program

Program a

1) What is the output of the following program?

public class Test
{
	private static float temp(a)
	{
		public static float sum = 21;
		return(--(sum));
	}
	public static void main(String[] args)
	{
		Test test = newTest(); System.out.println(test.temp()); }}Copy the code

A) 21 B) 20 C) compilation error D) runtime error

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Program 2

2) What is the output of the following program?

public class Test
{
	public static void main(String[] args)
	{
		int value = 3, sum = 6 + -- value;
		
		intdata = --value + ++value / sum++ * value++ + ++sum % value--; System.out.println(data); }}Copy the code

a) 1

b) 2

c) 0

d) 3

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Application of three

3) What is the output of the following program?

public class Test
{
	public static void main(String[] args)
	{
		int temp = 40;
		if(temp == 30 && temp/0= =4)
		{
			System.out.println(1);
		}
		else
		{
			System.out.println(2); }}}Copy the code

A) 1 b) 2 c). Java lang. ArithmeticException runtime exception d) compile errors due to be divided exactly by 0

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Application of four

4) What is the output of the following program?

public class Test
{
	public static void main(String[] args)
	{
		int temp = 9;
		int data = 8; System.out.println(temp & data); }}Copy the code

a) 9

b) 8

c) 1000

d) 1001

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Application of five

5) What is the output of the following program?

public class Test
{
	public static void main(String[] args)
	{
		int temp = null;
		Integer data = null;
		System.out.println(temp + ""+ data); }}Copy the code

A) null NULL B) compile error due to temperature C) compile error due to data d) runtime error

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The second part is the output and analysis of the program

Output and parsing

Program one output

The answer:

(c)Copy the code

Description:

Static variables are associated with classes and are therefore not allowed in the body of a method.

Program two output

The answer:

(b)Copy the code

Description:

Refer to the operator precedence rules in Java.

Program three output

The answer:

(b)
Copy the code

Description:

The && operator evaluates from left to right. If the first expression of the && operator evaluates to false, the second operator is not evaluated. There is no compilation error because dividing by 0 is a runtime exception.

Procedure 4 Answer

Answer:

(b)
Copy the code

Description:

The & operator is the logical bitwise sum operator in Java. The sum of 9(1001) and 8(1000) is 1000, which is 8.

Procedure 5 Answer

Answer:

(b)
Copy the code

Description:

Temp is a primitive data type. Null values cannot be assigned to raw data types. Data is an instance of the Integer class, so null values can be held.

That’s all for this article

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