C++ Institute CLP-12-01 問題練習

Question No : 1
What system call is used to obtain error number information?

• A.close()
• B.errno
• C.access()
• D.read()

答えを確認する

正解:
Explanation:
errno is a variable that stores the error number from system calls indicating the type of error that occurred.

Question No : 2
Which function is used to accept a connection from a client in socket programming?

• A.recv()
• B.send()
• C.connect()
• D.accept()

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正解:
Explanation:
The "accept" function is used to accept a connection from a client in socket programming.

Question No : 3
Which of the following C standards introduced the _Bool keyword for boolean data types?

• A.C11
• B.C89
• C.C99
• D.C95

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正解:
Explanation:
C11 introduced the _Bool keyword for boolean data types.

Question No : 4
What function is used to concatenate two strings in C?

• A.strcat()
• B.strncpy()
• C.memcpy()
• D.strcpy()

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正解:
Explanation:
strcat() is used to concatenate two strings in C.

Question No : 5
What is the purpose of the "connect" function in socket programming?

• A.To accept incoming connections
• B.To close a connection
• C.To send data to a server
• D.To establish a connection with a remote host

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正解:
Explanation:
The "connect" function in socket programming is used to establish a connection with a remote host.

Question No : 6
Which type of concurrency model is used by POSIX threads (pthread) in C programming?

• A.Preemptive
• B.Co-operative
• C.Single-threaded
• D.Multi-threaded

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正解:
Explanation:
POSIX threads (pthread) in C programming use a multi-threaded concurrency model.

Question No : 7
In <stdarg.h>, what data type is used to declare a variable which represents the argument list?

• A.va_float
• B.va_list
• C.va_int
• D.va_char

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正解:
Explanation:
The va_list data type is used to declare a variable representing the argument list.

Question No : 8
What is the purpose of the new C11 keyword _Generic?

• A.To specify the alignment of data structures
• B.To declare variables with a generic data type
• C.To provide generic error handling in functions
• D.To define generic functions that can operate on different data types

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正解:
Explanation:
The new C11 keyword _Generic allows the definition of generic functions that can operate on different data types.

Question No : 9
Which system call is used to check the accessibility of a file in C programming?

• A.access()
• B.errno
• C.close()
• D.open()

答えを確認する

正解:
Explanation:
The access() system call is used to check the accessibility of a file in C programming.

Question No : 10
Which C11 keyword is used to indicate a function that never returns?

• A._Noreturn
• B._Pragma
• C._Alignof
• D._Bool

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正解:
Explanation:
The _Noreturn keyword in C11 is used to indicate a function that never returns control to its caller.

Question No : 11
What is the purpose of the function socket() in network socket programming?

• A.To establish a connection with a remote server
• B.To create a new socket
• C.To send data over the network
• D.To bind a socket to a specific network address

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正解:
Explanation:
The function socket() is used to create a new socket in network socket programming.

Question No : 12
In the context of managing Unix and Windows processes, what is a PID?

• A.Priority In Dispatch
• B.Program Identifier
• C.Process Identification Number
• D.Process Indicator

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正解:
Explanation:
PID stands for Process Identification Number in managing Unix and Windows processes.

Question No : 13
Which protocol is commonly used for network socket programming?

• A.TCP
• B.DNS
• C.SSH
• D.HTML

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正解:
Explanation:
TCP (Transmission Control Protocol) is commonly used for network socket programming.

Question No : 14
What is the purpose of using memory alignment techniques in specialized programming considerations?

• A.Memory alignment is a security measure against buffer overflows
• B.Memory alignment is exclusively used in high-level languages
• C.Memory alignment is used to optimize data access and improve performance
• D.Memory alignment techniques have no impact on program performance

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正解:
Explanation:
Using memory alignment techniques in specialized programming considerations helps optimize data access, enhance performance, and ensure that memory accesses conform to hardware requirements.

Question No : 15
Which data type in C has the largest size?

• A.long
• B.float
• C.double
• D.int

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正解:
Explanation:
The double data type in C typically has a larger size than int, long, or float.