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(1) In A full binary tree with A depth of 5, the number of leaf nodes is A) 32B) 31C) 16D) 15 (2) if A binary tree uses abdgcefh as its forward traversal access order and dgbaechf as its central traversal access order, the node access order for the subsequent traversal is A) bdgcefhaB) gdbecfhaC) bdgaechfD) gdbehfca (3) Some important programs (1) In A full binary tree with A depth of 5, the number of leaf nodes is A) 32 B) 31 C) 16 D) 15 (2) if A binary tree uses abdgcefh in the forward travers

inserted and deleted at the endpoint.D) nothing in common (2) It is known that the binary tree's post-order traversal sequence is dabec, the middle-order traversal sequence is debac, and its pre-order traversal sequence isA) acbedB) decabC) deabcD) cedba (3) What is not characteristic of a linked list?A) You do not have to estimate the storage space beforehand.B) Random Access to any elementC) insert and delete elements that do not need to be moved

Article Title: some technical information about NICs in Linux (1 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. For those who want to learn more about how NICs work, how to use existing drivers, and try to write their own drivers for NICs that are not currently supported, this information should be useful. If you do not have this idea, skip this section.

resources as they mature. However, Linux2.4 effectively curbed this trend. In a specific environment, Linux2.4 requires less memory. Of course, Linux2.4 includes more features than Linux2.2, and many new features require resources. 　　 Support for more System buses Linux2.2 supports all major bus in Intel hardware, including (E) ISA, VLB, PCI, and MCA. In addition, Linux2.4 supports ISA Plug-and-play device

This article turns from http://www.cnblogs.com/guoxiao/p/3583432.htmlRecently, I've been working on the runtime mechanism, and I think there's probably a lot of people who don't know that. I am here to share with you my understanding of the runtime mechanism.To understand runtime, we first understand the internal structure of classes and objects, and we will first describe the hierarchy of classes and objects in the lower OC.First, the definition of class and object is found from the runtime.h h

scrolls through the list with a finger or enters on a virtual keyboard, the Uikit generates time to transmit to the uiresponder response chain until an object in the chain handles the event. The corresponding core objects, such as: UIApplication, Uiwindow,uiview are inherited directly or indirectly from Uiresponder.2. Cocoa Object 2.1 Objective-c is an object-oriented languageObjective-c, like Java C + +, has encapsulation, inheritance, polymorphism, and reuse. However, unlike C + +, it has ove

a variety of ways, depending on their environment, and the range of support Rtti is different. The current common support methods include:A Visual C + + environment for rtti── such as,microsoft company is provided by the class library.provided by the C + + compiler (compiler)-for example, version,borland C + + 4.5.Provided by the Source code generator (code generator), such as the BELLVOBR system.Provided by the special preprocessor (preprocessor) of the OO database-for example, the poet system

of the program)1. Learning Objectives① understand the concept of reverse and ② master the X86 compilation basis, be able to read (reverse) Assembly code ③ Understanding of ISA (instruction set architecture) ④ understand the concept of function call stack frame, and can be debugged with GDB2. Key points of knowledgep104, p105:x86 addressing way of the definition of the three generations of P106:isa,

First, we will introduce several concepts about the runtime system: (1) ISA pointer: when an object is created, the first element in the memory layout is a pointer to the class structure, that is, Isa. Using the ISA pointer, an object can access its class structure and then access the inherited class structure. (2) SEL data type: it is the environment parameter f

An Introduction to objective-C Meta class First, let's have a look at the base class nsobject. @ Interface nsobject Class ISA; // point to Meta class, all instances of nsobject share the same Meta class. } + (Void) load; + (Void) initialize; -(ID) Init; + (ID) New;+ (ID) allocwithzone :( nszone *) zone;+ (ID) alloc;-(Void) dealloc; + (Class) superclass;+ (Class) class;... @ End Class is defined:Typedef struct objc_class * class;Struct objc_class {Cla

Readme.pam_warnReadme.pam_env Readme.pam_rootok Readme.pam_wheelReadme.pam_filter Readme.pam_securetty Readme.pam_xauth[Email protected] txts]#More Readme.pam_securettyPam_securetty:Allows root logins only if the user was logging in on a"Secure" TTY, as defined by the listing In/etc/securettyAlso checks to make sure That/etc/securetty is a plainFile and not world writable.-Elliot Lee, Red Hat software.July 25, 1996.[Email protected] txts]#More/etc/securettyConsoleVc/1Vc/2Vc/3Vc/4Vc/5Vc/6Vc/7Vc/

), and if you do not delete references to those objects after processing, you can cause an increasing number of unwanted object references in your application. After a program is started, the amount of heap usage is generally constant. As more and more objects are created, the amount of space in the heap becomes more and more, so the usage of the heap increases. The GC reclaims the space occupied by objects that are no longer needed. When a Java program begins to leak memory, the amount of heap

Java garbage collection mechanism.Advantages of 2.2 Objective-cObjective-c language has C + + Java and other object-oriented features, it is far from the advantages of the expression. The advantage of objective-c is that it is dynamic. There are three types of dynamic capabilities:Dynamic class-The runtime determines the object of the classDynamic binding-The runtime determines which method to invokeDynamic load--load a new module for a program at run time2.3 Dynamic capability-related

that you do not have to know whether an object can process messages before sending messages. If you send a message to him, the message may be processed or transferred to another Object for processing. A message does not have to correspond to a method. An object may implement a method to process multiple messages. During compilation, RunTime will convert the above Code: objc_msgSend(obj,@selector(makeText)); So in fact Objc_msgSend (obj, @ selector (makeText); and [obj makeText];Is equivalent

Program from 32bit to 64bit summary: First, the emergence of various "Objc_class$_sharesdk ", referenced from:Solution:Online version:-Check Targets->build settings->architectures.Change build active architectures only to NO.-Remove the arm64 parameter from the bottom valid architectures (but this does not support the 64-bit?). )Or:-Double-click Architectures, select Other, delete $(ARCH_STANDARD) , and then add ARMv7 and Armv7s (write on: $(ARCHS_STANDARD_32_BIT) ).-Clean and build.Personal sol

root bus is 0. In PC, the memory controller is usually integrated into the host/PCI bridge device chip. Therefore, the host/PCI bridge is also known as the "North Bridge chipset (North Bridge chipset )". 2). PCI/ISA Bridge: used to connect to the old ISA bus. In general, devices like the i8359a Interrupt Controller in PCI are also integrated into PCI/ISA bridge

Multiple choice questions 1:Set float a = 2, B = 4, C = 3;, the followingC LanguageWhich of the following statements is inconsistent with the calculation result of A + B + C?A. (A + B) * C/2B. (1/2) * (a + B) * CC. (A + B) * C * 1/2D. c/2 * (A + B)Reference answer: B, because all three variables A, B, and C are floating-point numbers, the result of B is 0, because 1/2 is 0. If it is changed to 1/2. 0 is correct. 2:To convert binary dataFileTail increaseDataTo open the file.A. "AB ″B. "RB +

Document directory 1.1. Cocoa framework 1.2. Foundation framework 1.3 UIKit framework 2.1 Objective-C is an object-oriented language 2.2 advantages of Objective-C 2.3 dynamic capability-related isa pointer 2.4 NSObject 2.5 Cocoa object Lifecycle The Cocoa framework is the basis of iOS applications. Understanding the Cocoa framework is of great help for developing iOS applications. 1. What is Cocoa? Cocoa is the operating environment for O

Processor Architecture ISA One processor supportsCommandAndByte encoding of commandsCalled itsInstruction Set architecture ISA. Although the performance and complexity of the processors manufactured by each vendor are constantly improved, different models are compatible at the ISA level. Therefore, ISA providesConcept

roughly describe what the Linux kernel has done for us (master), and then what we should do (times ). (1) What does Linux kernel do? Simply put, the Linux kernel mainly involves enumeration and configuration of PCI devices, which are completed at the beginning of the kernel. Enumeration: For the PCI bus, a device called the PCI bridge is used to connect the parent bus to the sub-bus. As a special PCI device, the PCI bridge mainly includes the following three types: (1) host/PCI Bridge: used to