c# 插入树形数据#_C#数据类型能力问题 套装1
c# 插入树形数据#
This section contains aptitude questions and answers on C# data types (set 1).
本节包含有关C#数据类型(集合1)的能力问题和答案。
1) "int" is an alias of _________.System.Int16
System.Int32
System.Int64
System.Byte
Correct answer: 2
System.Int32
int is an alias of System.Int32 type, it takes 32 bits in the memory.
1) “ int”是_________的别名。System.Int16
System.Int32
System.Int64
系统字节
正确答案:2
System.Int32
int是System.Int32类型的别名,它在内存中占用32位。
2) "char" is an alias of _________.System.Char
System.String
System.Text
Character
Correct answer: 1
System.Char
char is an alias of System.Char type, it takes 2 bytes space in the memory. Read more: char keyword in C#.
2) “ char”是_________的别名。系统字符
System.String
系统文字
字符
正确答案:1
系统字符
char是System.Char类型的别名,它在内存中占用2个字节的空间。 : C#中的char关键字 。
3) A "byte" type variable stores the value between the range of ________.-128 to +127
0 to 127
0 to 255
0 to 256
Correct answer: 3
0 to 255
byte is an alias of System.Byte type, it takes 1 byte space in the memory. Read more: byte keyword in C#.
3) “字节”类型变量存储________范围之间的值。-128至+127
0至127
0至255
0至256
正确答案:3
0至255
byte是System.Byte类型的别名,它在内存中占用1个字节的空间。 : C#中的byte关键字 。
4) A "sbyte" type variable stores the value between the range of ________.-128 to +127
0 to 127
0 to 255
0 to 256
Correct answer: 1
-128 to +127
sbyte stands for signed byte, it's an alias of System.SByte, it takes 1-byte space in the memory. Read more: sbyte keyword in C#.
4) “ sbyte”类型变量存储________范围之间的值。-128至+127
0至127
0至255
0至256
正确答案:1
-128至+127
sbyte代表有符号字节,它是System.SByte的别名,它在内存中占用1个字节的空间。 : C#中的sbyte关键字 。
5) What will be the output of the following program? static void Main(string[] args) {byte a = 10;byte b = 20;byte sum = a + b;Console.WriteLine(sum); }30
Compilation error
Run time error
None
Correct answer: 2
Compilation error: Cannot implicitly convert type 'int' to 'byte'
By default, Arithmetic operation evaluates to 'int'.
To fix this problem, cast the expression as byte sum = (byte) (a+b);
5)以下程序的输出是什么?30
编译错误
运行时错误
没有
正确答案:2
编译错误:无法将类型'int'隐式转换为'byte'
默认情况下,算术运算的结果为'int'。
要解决此问题,请将表达式强制转换为byte sum =(byte)(a + b);
6) What will be the output of the following program? static void Main(string[] args) {sbyte a = -10;sbyte b = 20;sbyte sum = a + b;Console.WriteLine(sum); }10
Compilation error
Run time error
None
Correct answer: 2
Compilation error: Cannot implicitly convert type 'int' to 'sbyte'
By default, Arithmetic operation evaluates to 'int'.
To fix this problem, cast the expression as sbyte sum = (sbyte) (a+b);
6)以下程序的输出是什么?10
编译错误
运行时错误
没有
正确答案:2
编译错误:无法将类型'int'隐式转换为'sbyte'
默认情况下,算术运算的结果为'int'。
要解决此问题,请将表达式强制转换为sbyte sum =(sbyte)(a + b);
7) Which is the correct range int in C#?0 to 255
-32,768 to 32,767
-2,147,483,648 to 2,147,483,647
0 to 4,294,967,295
Correct answer: 3
-2,147,483,648 to 2,147,483,647
The correct range of int is from -2,147,483,648 to 2,147,483,647
7)C#中正确的范围int是什么?0至255
-32,768至32,767
-2,147,483,648至2,147,483,647
0至4,294,967,295
正确答案:3
-2,147,483,648至2,147,483,647
int的正确范围是-2,147,483,648到2,147,483,647
8) Which is the correct range uint in C#?0 to 255
-32,768 to 32,767
-2,147,483,648 to 2,147,483,647
0 to 4,294,967,295
Correct answer: 4
0 to 4,294,967,295
The correct range of uint is from 0 to 4,294,967,295
8)C#中正确的范围uint是什么?0至255
-32,768至32,767
-2,147,483,648至2,147,483,647
0至4,294,967,295
正确答案:4
0至4,294,967,295
uint的正确范围是0到4,294,967,295
9) Which is the correct range long in C#?-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
0 to 18,446,744,073,709,551,615
-2,147,483,648 to 2,147,483,647
0 to 4,294,967,295
Correct answer: 1
-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
The correct range of long is from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
9)C#中正确的范围是多少?-9,223,372,036,854,775,808至9,223,372,036,854,775,807
0至18,446,744,073,709,551,615
-2,147,483,648至2,147,483,647
0至4,294,967,295
正确答案:1
-9,223,372,036,854,775,808至9,223,372,036,854,775,807
正确的long范围是-9,223,372,036,854,775,808至9,223,372,036,854,775,807
10) Which is the correct range ulong in C#?-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
0 to 18,446,744,073,709,551,615
-2,147,483,648 to 2,147,483,647
0 to 4,294,967,295
Correct answer: 2
0 to 18,446,744,073,709,551,615
The correct range of long is from 0 to 18,446,744,073,709,551,615
10)在C#中,哪个是正确的范围?-9,223,372,036,854,775,808至9,223,372,036,854,775,807
0至18,446,744,073,709,551,615
-2,147,483,648至2,147,483,647
0至4,294,967,295
正确答案:2
0至18,446,744,073,709,551,615
正确的long范围是从0到18,446,744,073,709,551,615
11) C# is developed by?Anders Hejlsberg
Dennis richie
Ken Thompson
Bjarne Stroustrup
Correct answer: 1
Anders Hejlsberg
C# is developed by Anders Hejlsberg.
11)C#是由谁开发的?安德斯·海斯伯格
丹尼斯·里奇
肯·汤普森
比尼亚·斯特鲁斯特鲁普(Bjarne Stroustrup)
正确答案:1
安德斯·海斯伯格
C#由Anders Hejlsberg开发。
12) How many bytes of data can be store in a char variable?1 byte
2 bytes
4 bytes
8 bytes
Correct answer: 2
2 bytes
If we declare a variable of char type, it occupies 2 bytes space in memory.
12)char变量中可以存储多少字节的数据?1个字节
2字节
4字节
8字节
正确答案:2
2字节
如果我们声明一个char类型的变量,则它将在内存中占用2个字节的空间。
13) What is the equivalent .NET type of float type in C#?System.Single
System.Double
System.Decimal
System.float
Correct answer: 1
System.Single
In C#.NET System.Single is the equivalent .NET type of float type.
13)C#中浮点类型的等效.NET类型是什么?单系统
系统双
系统十进制
系统浮动
正确答案:1
单系统
在C#.NET中,Single是等效的.NET类型的float类型。
14) There are following options are given below, which of them is not a valid .NET Type?System.Single
System.Double
System.Decimal
System.float
Correct answer: 4
System.float
System.float is not available of .NET framework.
14)下面给出了以下选项,其中哪个不是有效的.NET类型?单系统
系统双
系统十进制
系统浮动
正确答案:4
系统浮动
.NET框架不提供System.float。
15) What is the equivalent .NET type of double type in C#?System.Single
System.Double
System.Decimal
System.float
Correct answer: 2
System.Double
In C#.NET System.Double is the equivalent .NET type of double type.
15)C#中double类型的等效.NET类型是什么?单系统
系统双
系统十进制
系统浮动
正确答案:2
系统双
在C#.NET中,System.Double是double类型的等效.NET类型。
16) What is the equivalent .NET type of decimal type in C#?System.Single
System.Double
System.Decimal
System.float
Correct answer: 3
System.Decimal
In C#.NET System.Decimal is the equivalent .NET type of decimal type.
16)什么是C#中十进制类型的等效.NET类型?单系统
系统双
系统十进制
系统浮动
正确答案:3
系统十进制
在C#.NET中,System.Decimal是等效的十进制类型的.NET类型。
17) What is the correct size of float type variable in C#?32 bytes
16 bytes
4 bytes
8 bytes
Correct answer: 3
4 bytes
In C# the size of a float variable is 4 bytes.
17)C#中的float类型变量的正确大小是多少?32字节
16字节
4字节
8字节
正确答案:3
4字节
在C#中,浮点变量的大小为4个字节。
18) What is the correct size of double type variable in C#?32 bytes
16 bytes
4 bytes
8 bytes
Correct answer: 4
8 bytes
In C# the size of a double variable is 8 bytes.
18)C#中double类型变量的正确大小是多少?32字节
16字节
4字节
8字节
正确答案:4
8字节
在C#中,双精度变量的大小为8个字节。
19) What is the correct size of decimal type variable in C#?32 bytes
16 bytes
4 bytes
8 bytes
Correct answer: 2
16 bytes
In C# the size of a decimal variable is 16 bytes.
19)C#中十进制类型变量的正确大小是多少?32字节
16字节
4字节
8字节
正确答案:2
16字节
在C#中,十进制变量的大小为16个字节。
20) By default a real number is?Float
Double
Decimal
Single
Correct answer: 2
Double
By default, a real number is Double.
20)默认情况下,实数是?浮动
双
小数
单
正确答案:2
双
默认情况下,实数为Double。
21) To use real number for float type, what character we need to use as a suffix in C#?'f' or 'F'
'M' or 'm'
'D' or 'd'
'K' or 'k'
Correct answer: 1
'f' or 'F'
By default, a real number is Double. To use real number for float type, we need to use 'F'/'f' in suffix of real number.
21)要将实数用于浮点型,我们需要在C#中使用哪个字符作为后缀?'f'或'F'
'M'或'm'
'D'或'd'
'K'或'k'
正确答案:1
'f'或'F'
默认情况下,实数为Double。 要对浮点类型使用实数,我们需要在实数后缀中使用'F'/'f'。
22) To use real number for decimal type, what character we need to use as a suffix in C#?'f' or 'F'
'M' or 'm'
'D' or 'd'
'K' or 'k'
Correct answer: 2
'M' or 'm'
By default, a real number is Double. To use real number for decimal type, we need to use 'M'/'m' in suffix of real number.
22)要将实数用于十进制类型,我们需要在C#中使用哪个字符作为后缀?'f'或'F'
'M'或'm'
'D'或'd'
'K'或'k'
正确答案:2
'M'或'm'
默认情况下,实数为Double。 要将实数用于十进制类型,我们需要在实数后缀中使用'M'/'m'。
23) What is the precision of a float type number in C#?Up to 15 digits
Up to 7 digits
Up to 28 digits
Up to 20 digits
Correct answer: 2
Up to 7 digits
The precision of float numbers in C# is up to 7 digits.
23)C#中浮点类型数字的精度是多少?最多15位数字
最多7位数字
最多28位
最多20位
正确答案:2
最多7位数字
C#中浮点数的精度最高为7位数字。
24) What is the precision of a double type number in C#?Up to 15 digits
Up to 7 digits
Up to 28 digits
Up to 20 digits
Correct answer: 1
Up to 15 digits
The precision of double numbers in C# is up to 15 digits.
24)C#中双精度数字的精度是多少?最多15位数字
最多7位数字
最多28位
最多20位
正确答案:1
最多15位数字
C#中双精度数字的精度最高为15位。
25) What is the precision of a decimal type number in C#?Up to 15 digits
Up to 7 digits
Up to 28 digits
Up to 20 digits
Correct answer: 3
Up to 28 digits
The precision of decimal numbers in C# is up to 28 digits.
25)C#中十进制类型数字的精度是多少?最多15位数字
最多7位数字
最多28位
最多20位
正确答案:3
最多28位
C#中十进制数字的精度最高为28位。
翻译自: https://www.includehelp.com/dot-net/c-sharp-data-types-aptitude-questions-and-answers.aspx
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