c# 插入樹(shù)形數(shù)據(jù)#

This section contains aptitude questions and answers on C# data types (set 1).

本節(jié)包含有關(guān)C＃數(shù)據(jù)類型(集合1)的能力問(wèn)題和答案。

1) "int" is an alias of _________.

System.Int16

System.Int32

System.Int64

System.Byte

Answer & Explanation

Correct answer: 2
System.Int32

int is an alias of System.Int32 type, it takes 32 bits in the memory.

1) “ int”是_________的別名。

System.Int16

System.Int32

System.Int64

系統(tǒng)字節(jié)

答案與解釋

正確答案：2
System.Int32

int是System.Int32類型的別名，它在內(nèi)存中占用32位。

2) "char" is an alias of _________.

System.Char

System.String

System.Text

Character

Answer & Explanation

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_________的別名。

系統(tǒng)字符

System.String

系統(tǒng)文字

字符

答案與解釋

正確答案：1
系統(tǒng)字符

char是System.Char類型的別名，它在內(nèi)存中占用2個(gè)字節(jié)的空間。 ： C＃中的char關(guān)鍵字 。

3) A "byte" type variable stores the value between the range of ________.

-128 to +127

0 to 127

0 to 255

0 to 256

Answer & Explanation

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) “字節(jié)”類型變量存儲(chǔ)________范圍之間的值。

-128至+127

0至127

0至255

0至256

答案與解釋

正確答案：3
0至255

byte是System.Byte類型的別名，它在內(nèi)存中占用1個(gè)字節(jié)的空間。 ： C＃中的byte關(guān)鍵字 。

4) A "sbyte" type variable stores the value between the range of ________.

-128 to +127

0 to 127

0 to 255

0 to 256

Answer & Explanation

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”類型變量存儲(chǔ)________范圍之間的值。

-128至+127

0至127

0至255

0至256

答案與解釋

正確答案：1
-128至+127

sbyte代表有符號(hào)字節(jié)，它是System.SByte的別名，它在內(nèi)存中占用1個(gè)字節(jié)的空間。 ： C＃中的sbyte關(guān)鍵字 。

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

Answer & Explanation

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)以下程序的輸出是什么？

30

編譯錯(cuò)誤

運(yùn)行時(shí)錯(cuò)誤

沒(méi)有

答案與解釋

正確答案：2
編譯錯(cuò)誤：無(wú)法將類型'int'隱式轉(zhuǎn)換為'byte'

默認(rèn)情況下，算術(shù)運(yùn)算的結(jié)果為'int'。

要解決此問(wèn)題，請(qǐng)將表達(dá)式強(qiáng)制轉(zhuǎn)換為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

Answer & Explanation

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)以下程序的輸出是什么？

10

編譯錯(cuò)誤

運(yùn)行時(shí)錯(cuò)誤

沒(méi)有

答案與解釋

正確答案：2
編譯錯(cuò)誤：無(wú)法將類型'int'隱式轉(zhuǎn)換為'sbyte'

默認(rèn)情況下，算術(shù)運(yùn)算的結(jié)果為'int'。

要解決此問(wèn)題，請(qǐng)將表達(dá)式強(qiáng)制轉(zhuǎn)換為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

Answer & Explanation

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＃中正確的范圍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

答案與解釋

正確答案：3
-2,147,483,648至2,147,483,647

int的正確范圍是-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

Answer & Explanation

Correct answer: 4
0 to 4,294,967,295

The correct range of uint is from 0 to 4,294,967,295

8)C＃中正確的范圍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

答案與解釋

正確答案：4
0至4,294,967,295

uint的正確范圍是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

Answer & Explanation

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＃中正確的范圍是多少？

-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

答案與解釋

正確答案：1
-9,223,372,036,854,775,808至9,223,372,036,854,775,807

正確的long范圍是-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

Answer & Explanation

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，哪個(gè)是正確的范圍？

-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

答案與解釋

正確答案：2
0至18,446,744,073,709,551,615

正確的long范圍是從0到18,446,744,073,709,551,615

11) C# is developed by?

Anders Hejlsberg

Dennis richie

Ken Thompson

Bjarne Stroustrup

Answer & Explanation

Correct answer: 1
Anders Hejlsberg

C# is developed by Anders Hejlsberg.

11)C＃是由誰(shuí)開(kāi)發(fā)的？

安德斯·海斯伯格

丹尼斯·里奇

肯·湯普森

比尼亞·斯特魯斯特魯普(Bjarne Stroustrup)

答案與解釋

正確答案：1
安德斯·海斯伯格

C＃由Anders Hejlsberg開(kāi)發(fā)。

12) How many bytes of data can be store in a char variable?

1 byte

2 bytes

4 bytes

8 bytes

Answer & Explanation

Correct answer: 2
2 bytes

If we declare a variable of char type, it occupies 2 bytes space in memory.

12)char變量中可以存儲(chǔ)多少字節(jié)的數(shù)據(jù)？

1個(gè)字節(jié)

2字節(jié)

4字節(jié)

8字節(jié)

答案與解釋

正確答案：2
2字節(jié)

如果我們聲明一個(gè)char類型的變量，則它將在內(nèi)存中占用2個(gè)字節(jié)的空間。

13) What is the equivalent .NET type of float type in C#?

System.Single

System.Double

System.Decimal

System.float

Answer & Explanation

Correct answer: 1
System.Single

In C#.NET System.Single is the equivalent .NET type of float type.

13)C＃中浮點(diǎn)類型的等效.NET類型是什么？

單系統(tǒng)

系統(tǒng)雙

系統(tǒng)十進(jìn)制

系統(tǒng)浮動(dòng)

答案與解釋

正確答案：1
單系統(tǒng)

在C＃.NET中，Single是等效的.NET類型的float類型。

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

Answer & Explanation

Correct answer: 4
System.float

System.float is not available of .NET framework.

14)下面給出了以下選項(xiàng)，其中哪個(gè)不是有效的.NET類型？

單系統(tǒng)

系統(tǒng)雙

系統(tǒng)十進(jìn)制

系統(tǒng)浮動(dòng)

答案與解釋

正確答案：4
系統(tǒng)浮動(dòng)

.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

Answer & Explanation

Correct answer: 2
System.Double

In C#.NET System.Double is the equivalent .NET type of double type.

15)C＃中double類型的等效.NET類型是什么？

單系統(tǒng)

系統(tǒng)雙

系統(tǒng)十進(jìn)制

系統(tǒng)浮動(dòng)

答案與解釋

正確答案：2
系統(tǒng)雙

在C＃.NET中，System.Double是double類型的等效.NET類型。

16) What is the equivalent .NET type of decimal type in C#?

System.Single

System.Double

System.Decimal

System.float

Answer & Explanation

Correct answer: 3
System.Decimal

In C#.NET System.Decimal is the equivalent .NET type of decimal type.

16)什么是C＃中十進(jìn)制類型的等效.NET類型？

單系統(tǒng)

系統(tǒng)雙

系統(tǒng)十進(jìn)制

系統(tǒng)浮動(dòng)

答案與解釋

正確答案：3
系統(tǒng)十進(jìn)制

在C＃.NET中，System.Decimal是等效的十進(jìn)制類型的.NET類型。

17) What is the correct size of float type variable in C#?

32 bytes

16 bytes

4 bytes

8 bytes

Answer & Explanation

Correct answer: 3
4 bytes

In C# the size of a float variable is 4 bytes.

17)C＃中的float類型變量的正確大小是多少？

32字節(jié)

16字節(jié)

4字節(jié)

8字節(jié)

答案與解釋

正確答案：3
4字節(jié)

在C＃中，浮點(diǎn)變量的大小為4個(gè)字節(jié)。

18) What is the correct size of double type variable in C#?

32 bytes

16 bytes

4 bytes

8 bytes

Answer & Explanation

Correct answer: 4
8 bytes

In C# the size of a double variable is 8 bytes.

18)C＃中double類型變量的正確大小是多少？

32字節(jié)

16字節(jié)

4字節(jié)

8字節(jié)

答案與解釋

正確答案：4
8字節(jié)

在C＃中，雙精度變量的大小為8個(gè)字節(jié)。

19) What is the correct size of decimal type variable in C#?

32 bytes

16 bytes

4 bytes

8 bytes

Answer & Explanation

Correct answer: 2
16 bytes

In C# the size of a decimal variable is 16 bytes.

19)C＃中十進(jìn)制類型變量的正確大小是多少？

32字節(jié)

16字節(jié)

4字節(jié)

8字節(jié)

答案與解釋

正確答案：2
16字節(jié)

在C＃中，十進(jìn)制變量的大小為16個(gè)字節(jié)。

20) By default a real number is?

Float

Double

Decimal

Single

Answer & Explanation

Correct answer: 2
Double

By default, a real number is Double.

20)默認(rèn)情況下，實(shí)數(shù)是？

浮動(dòng)

雙

小數(shù)

單

答案與解釋

正確答案：2
雙

默認(rèn)情況下，實(shí)數(shù)為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'

Answer & Explanation

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)要將實(shí)數(shù)用于浮點(diǎn)型，我們需要在C＃中使用哪個(gè)字符作為后綴？

'f'或'F'

'M'或'm'

'D'或'd'

'K'或'k'

答案與解釋

正確答案：1
'f'或'F'

默認(rèn)情況下，實(shí)數(shù)為Double。 要對(duì)浮點(diǎn)類型使用實(shí)數(shù)，我們需要在實(shí)數(shù)后綴中使用'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'

Answer & Explanation

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)要將實(shí)數(shù)用于十進(jìn)制類型，我們需要在C＃中使用哪個(gè)字符作為后綴？

'f'或'F'

'M'或'm'

'D'或'd'

'K'或'k'

答案與解釋

正確答案：2
'M'或'm'

默認(rèn)情況下，實(shí)數(shù)為Double。 要將實(shí)數(shù)用于十進(jìn)制類型，我們需要在實(shí)數(shù)后綴中使用'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

Answer & Explanation

Correct answer: 2
Up to 7 digits

The precision of float numbers in C# is up to 7 digits.

23)C＃中浮點(diǎn)類型數(shù)字的精度是多少？

最多15位數(shù)字

最多7位數(shù)字

最多28位

最多20位

答案與解釋

正確答案：2
最多7位數(shù)字

C＃中浮點(diǎn)數(shù)的精度最高為7位數(shù)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

Answer & Explanation

Correct answer: 1
Up to 15 digits

The precision of double numbers in C# is up to 15 digits.

24)C＃中雙精度數(shù)字的精度是多少？

最多15位數(shù)字

最多7位數(shù)字

最多28位

最多20位

答案與解釋

正確答案：1
最多15位數(shù)字

C＃中雙精度數(shù)字的精度最高為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

Answer & Explanation

Correct answer: 3
Up to 28 digits

The precision of decimal numbers in C# is up to 28 digits.

25)C＃中十進(jìn)制類型數(shù)字的精度是多少？

最多15位數(shù)字

最多7位數(shù)字

最多28位

最多20位

答案與解釋

正確答案：3
最多28位

C＃中十進(jìn)制數(shù)字的精度最高為28位。

翻譯自: https://www.includehelp.com/dot-net/c-sharp-data-types-aptitude-questions-and-answers.aspx

c# 插入樹(shù)形數(shù)據(jù)#

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